| Common Name | Scientific Name | Code |
| n/a | Aleurites moluccana (L.) Willd. var. katoi O.& I. Deg. & B.C. Stone | ALMOK2 |
| n/a | Antidesma ?kapuae Rock (pro sp.) [platyphyllum ? pulvinatum] | ANKA |
| n/a | Chamaesyce ?keyensis Small [garberi ? porteriana] | CHKE |
| n/a | Chamaesyce pergamena (Small) Small | CHPE14 |
| n/a | Chamaesyce torralbasii (Urban) Millsp. [excluded] | CHTO6 |
| n/a | Claoxylon marianum M?ll. Arg. | CLMA25 |
| n/a | Croton corylifolius Lam. [excluded] | CRCO40 |
| n/a | Croton saipanense Hosok. | CRSA16 |
| n/a | Ditrysinia Raf. | DITRY |
| n/a | Drypetes dolichocarpa Kaneh. | DRDO3 |
| n/a | Euphorbia ?gayeri Boros & So? ex So? [cyparissias ? ?tommasiniana] | EUGA7 |
| n/a | Euphorbia breoni Nois. | EUBR16 |
| n/a | Euphorbia candelabrum Kotschy | EUCA29 |
| n/a | Euphorbia chamissonis (Klotzsch & Garcke) Boiss. | EUCH14 |
| n/a | Euphorbia decaryi Guillaumin | EUDE17 |
| n/a | Euphorbia decaryi Guillaumin var. capsaintemariensis (Rauh) Cremers | EUDEC2 |
| n/a | Euphorbia josei Oudejans [excluded] | EUJO4 |
| n/a | Euphorbia milii Desmoul. var. splendens (Bojer) Ursch & Leandri | EUMIS |
| n/a | Euphorbia palustris L. | EUPA25 |
| n/a | Euphorbia reinwardtiana Steud. | EURE17 |
| n/a | Euphorbia valida N.E. Br. | EUVA5 |
| n/a | Euphorbia woodii N.E. Br. | EUWO5 |
| n/a | Excoecaria agallocha L. | EXAG |
| n/a | Excoecaria L. | EXCOE |
| n/a | Garcia Rohr | GARCI3 |
| n/a | Glochidion J.R. & G. Forst. | GLOCH |
| n/a | Glochidion marianum M?ll. Arg. | GLMA9 |
| n/a | Glochidion ponapense Hosokawa | GLPO2 |
| n/a | Jatropha spathula Muell. Arg. | JASP |
| n/a | Macaranga thompsonii Merr. | MATH3 |
| n/a | Melanolepis multiglandulosa (Reinw. ex Blume) Rchb. f. & Zoll. | MEMU10 |
| n/a | Melanolepis multiglandulosa (Reinw. ex Blume) Rchb. f. & Zoll. var. glabrata (M?ll. Arg.) Fosberg | MEMUG |
| n/a | Melanolepis Rchb. f. & Zoll. | MELAN10 |
| n/a | Microstachys Juss. | MICRO21 |
| n/a | Phyllanthus marianus M?ll. Arg. | PHMA31 |
| n/a | Phyllanthus saffordii Merr. | PHSA15 |
| n/a | Sapium japonicum (Siebold & Zucc.) Pax & K. Hoffm. | SAJA8 |
| 'akoko | Chamaesyce arnottiana (Endl.) O.& I. Deg. | CHAR17 |
| 'ekoko | Chamaesyce celastroides (Boiss.) Croizat & Deg. | CHCE |
| 'ekoko | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. amplectens (Sherff) O.& I. Deg. | CHCEA |
| 'ekoko | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. celastroides | CHCEC |
| 'ekoko | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. hanapepensis (Sherff) O.& I. Deg. | CHCEH |
| 'ekoko | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. kaenana (Sherff) O.& I. Deg. | CHCEK |
| 'ekoko | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. laehiensis (O.& I. Deg. & Sherff) Koutnik | CHCEL |
| 'ekoko | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. lorifolia (Gray) O.& I. Deg. | CHCEL2 |
| 'ekoko | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. stokesii (Forbes) O.& I. Deg. | CHCES |
| 'ekoko | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. tomentella (Boiss.) Koutnik | CHCET |
| Abrams's sandmat | Chamaesyce abramsiana (L.C. Wheeler) Koutnik | CHAB2 |
| Acalypha amentacea ssp. wilkesiana | Acalypha wilkesiana Muell.-Arg. | ACWI |
| Acalypha aristata | Acalypha arvensis Poepp. | ACAR16 |
| Acalypha californica | Acalypha pringlei S. Wats. | ACPR |
| Acalypha deamii | Acalypha rhomboidea Raf. var. deamii (Weatherby) Weatherby | ACRHD |
| Acalypha deamii | Acalypha virginica L. var. deamii Weatherby | ACVID |
| Acalypha gracilens | Acalypha gracilens Gray var. delzii L. Mill. | ACGRD |
| Acalypha gracilens | Acalypha gracilens Gray var. fraseri (Muell.-Arg.) Weatherby | ACGRF |
| Acalypha gracilens | Acalypha virginica L. var. gracilens (Gray) Muell.-Arg. | ACVIG |
| Acalypha mexicana | Acalypha indica L. var. mexicana (Muell.-Arg.) Pax & K. Hoffmann | ACINM |
| Acalypha monococca | Acalypha gracilens Gray ssp. monococca (Engelm. ex Gray) G.L. Webster | ACGRM2 |
| Acalypha monococca | Acalypha gracilens Gray var. monococca Engelm. ex Gray | ACGRM |
| Acalypha monococca | Acalypha virginica L. var. monococca (Gray) Muell.-Arg. | ACVIM |
| Acalypha monostachya | Acalypha hederacea Torr. | ACHE |
| Acalypha ostryifolia | Acalypha caroliniana Ell. | ACCA8 |
| Acalypha phleoides | Acalypha lindheimeri Muell.-Arg. | ACLI |
| Acalypha phleoides | Acalypha lindheimeri Muell.-Arg. var. major Pax & K. Hoffmann | ACLIM |
| Acalypha poiretii | Acalypha indica Vell., non L. | ACIN |
| Acalypha rhomboidea | Acalypha virginica L. var. rhomboidea (Raf.) Cooperrider | ACVIR |
| achiotillo | Alchornea latifolia Sw. | ALLA |
| Adelia ricinella | Ricinella ricinella (L.) Britt. & P. Wilson | RIRI |
| Alabama croton | Croton alabamensis E.A. Sm. ex Chapman | CRAL3 |
| Alabama croton | Croton alabamensis E.A. Sm. ex Chapman var. alabamensis | CRALA |
| Alabama croton | Croton alabamensis E.A. Sm. ex Chapman var. texensis Ginzbarg | CRALT |
| Albanian spurge | Euphorbia characias L. | EUCH13 |
| alchornea | Alchornea Sw. | ALCHO |
| alchorneopsis | Alchorneopsis Muell.-Arg. | ALCHO2 |
| aleurites | Aleurites J.R. & G. Forst. | ALEUR |
| Aleurites moluccana | Aleurites javanica Gand. | ALJA7 |
| Aleurites moluccana | Aleurites triloba Forster & Forster f. | ALTR10 |
| alkali sandmat | Chamaesyce astyla (Engelm. ex Boiss.) Millsp. | CHAS2 |
| alpine sandmat | Chamaesyce olowaluana (Sherff) Croizat & Deg. | CHOL3 |
| amansa guapo | Savia sessiliflora (Sw.) Willd. | SASE6 |
| American ipecac | Euphorbia ipecacuanhae L. | EUIP |
| annual mercury | Mercurialis annua L. | MEAN |
| annual toothleaf | Stillingia spinulosa Torr. | STSP |
| Antidesma bunius | Antidesma bunias (L.) Spreng. [orthographic error] | ANBU5 |
| Antidesma platyphyllum var. hillebrandii | Antidesma platyphyllum Mann var. subamplexicaule Sherff | ANPLS |
| Antidesma platyphyllum var. platyphyllum | Antidesma platyphyllum Mann var. hamakuaense Fosberg | ANPLH |
| Antidesma platyphyllum var. platyphyllum | Antidesma pulvinatum Hbd. var. contractum O. Deg. & Sherff | ANPUC |
| Antidesma platyphyllum var. platyphyllum | Antidesma pulvinatum Hbd. var. leiogonum Sherff | ANPUL |
| Argythamnia adenophora | Ditaxis adenophora (Gray) Pax & K. Hoffman | DIAD5 |
| Argythamnia aphoroides | Ditaxis aphoroides (Muell.-Arg.) Pax | DIAP2 |
| Argythamnia astroplethos | Argythamnia astroplethes Ingram [orthographic error] | ARAS |
| Argythamnia astroplethos | Chiropetalum astroplethos (Ingram) A.R. Sm. & Govaerts | CHAS7 |
| Argythamnia blodgettii | Ditaxis blodgettii (Torr.) Pax | DIBL2 |
| Argythamnia brandegeei | Argythamnia brandegei Millsp. var. brandegei Millsp. [superfluous autonym; orthographic variant] | ARBRB3 |
| Argythamnia brandegeei | Ditaxis brandegei (Millsp.) Rose & Standl. [excluded] | DIBR13 |
| Argythamnia brandegeei var. intonsa | Ditaxis brandegeei (Millsp.) Rose & Standl. var. intonsa I.M. Johnston | DIBRI |
| Argythamnia californica | Ditaxis californica (Brandeg.) Heller | DICA13 |
| Argythamnia californica | Ditaxis serrata (Torr.) Heller var. californica (Brandeg.) V.W. Steinmann & R.S. Felger | DISEC |
| Argythamnia claryana | Argythamnia adenophora auct. non Gray [misapplied] | ARAD5 |
| Argythamnia claryana | Ditaxis adenophora auct. non (Gray) Pax & K. Hoffman [misapplied] | DIAD4 |
| Argythamnia claryana | Ditaxis claryana (Jepson) G.L. Webster | DICL4 |
| Argythamnia cyanophylla | Ditaxis cyanophylla Woot. & Standl. | DICY4 |
| Argythamnia cyanophylla | Ditaxis diversiflora Clokey | DIDI10 |
| Argythamnia fasciculata | Ditaxis fasciculata Vahl ex A. Juss. | DIFA5 |
| Argythamnia humilis var. humilis | Ditaxis humilis (Engelm. & Gray) Pax | DIHU |
| Argythamnia humilis var. laevis | Argythamnia laevis Torr. | ARLA16 |
| Argythamnia humilis var. laevis | Ditaxis laevis (Torr.) Heller | DILA14 |
| Argythamnia humilis var. leiosperma | Ditaxis humilis (Engelm. & Gray) Pax var. leiosperma (Waterfall) A.R. Sm. & Govaerts | DIHUL |
| Argythamnia lanceolata | Ditaxis lanceolata (Benth.) Pax & K. Hoffmann | DILA15 |
| Argythamnia mercurialina var. mercurialina | Ditaxis mercurialina (Nutt.) Coult. | DIME3 |
| Argythamnia neomexicana | Ditaxis neomexicana (Muell.-Arg.) Heller | DINE2 |
| Argythamnia serrata | Ditaxis serrata (Torr.) Heller | DISE11 |
| Argythamnia simulans | Ditaxis simulans A.R. Sm. & Govaerts | DISI10 |
| Arizona manihot | Manihot davisiae Croizat | MADA2 |
| Arizona nettlespurge | Jatropha cinerea (Ortega) Muell.-Arg. | JACI |
| Arizona sandmat | Chamaesyce arizonica (Engelm.) Arthur | CHAR18 |
| arrow poision plant | Sebastiania bilocularis S. Wats. | SEBI9 |
| ashy sandmat | Chamaesyce cinerascens (Engelm.) Small | CHCI2 |
| Australian acalypha | Acalypha australis L. | ACAU6 |
| baccaurea | Baccaurea Lour. | BACCA |
| baccaurea | Baccaurea ramiflora Lour. | BARA4 |
| Baccaurea ramiflora | Baccaurea sapida (Roxb.) Muell. Arg. | BASA8 |
| Bahama maidenbush | Savia bahamensis Britt. | SABA6 |
| Barbados nut | Jatropha curcas L. | JACU2 |
| bastard copperleaf | Acalypha chamaedryfolia (Lam.) Muell.-Arg. | ACCH2 |
| bastard hogberry | Margaritaria nobilis L. f. | MANO |
| beach sandmat | Chamaesyce degeneri (Sherff) Croizat & Deg. | CHDE6 |
| beechleaf croton | Croton betulinus Vahl | CRBE4 |
| beetle spurge | Euphorbia eriantha Benth. | EUER2 |
| bellyache bush | Jatropha gossypiifolia L. | JAGO |
| bellyache bush | Jatropha gossypiifolia L. var. elegans (Pohl) Muell.-Arg. | JAGOE |
| bellyache bush | Jatropha gossypiifolia L. var. gossypiifolia | JAGOG |
| Bentham's hevea | Hevea benthamiana Muell. Arg. | HEBE2 |
| Berlandier's nettlespurge | Jatropha cathartica Ter?n & Berl. | JACA3 |
| Bernardia dichotoma | Adelia bernardia L. | ADBE2 |
| Bernardia myricifolia | Bernardia incana Morton | BEIN |
| Bernardia myricifolia | Tyria myricifolia Scheele | TYMY |
| Berteron's sandmat | Chamaesyce berteriana (Balbis ex Spreng.) Millsp. | CHBE6 |
| betonyleaf noseburn | Tragia betonicifolia Nutt. | TRBE4 |
| bignay | Antidesma bunius (L.) Sprengel | ANBU3 |
| birdseed leaf-flower | Phyllanthus pudens L.C. Wheeler | PHPU6 |
| bishopwood | Bischofia Blume | BISCH |
| blackfoot sandmat | Chamaesyce angusta (Engelm.) Small | CHAN5 |
| blackseed spurge | Euphorbia bilobata Engelm. | EUBI4 |
| Blodgett's silverbush | Argythamnia blodgettii (Torr.) Chapman | ARBL2 |
| bluntleaf silverbush | Argythamnia stahlii Urban | ARST7 |
| Bonpland's croton | Croton bonplandianus Baill. | CRBO4 |
| boquillas sandmat | Chamaesyce golondrina (L.C. Wheeler) Shinners | CHGO3 |
| branched noseburn | Tragia ramosa Torr. | TRRA5 |
| breynia | Breynia J.R. & G. Forst. | BREYN |
| Breynia disticha | Breynia nivosa (Bull) Small | BRNI2 |
| Breynia disticha | Phyllanthus nivosus Bull | PHNI4 |
| bristlecup sandmat | Chamaesyce chaetocalyx (Boiss.) Woot. & Standl. | CHCH5 |
| bristlecup sandmat | Chamaesyce chaetocalyx (Boiss.) Woot. & Standl. var. chaetocalyx | CHCHC3 |
| bristlecup sandmat | Chamaesyce chaetocalyx (Boiss.) Woot. & Standl. var. triligulata (L.C. Wheeler) Mayfield | CHCHT |
| broadleaf spurge | Euphorbia platyphyllos L. | EUPL |
| broom silverbush | Argythamnia fasciculata (Vahl ex A. Juss.) Muell.-Arg. | ARFA |
| brush noseburn | Tragia glanduligera Pax & K. Hoffmann | TRGL |
| bush croton | Croton fruticulosus Engelm. ex Torr. | CRFR |
| bushweed | Flueggea Willd. | FLUEG |
| cafeillo | Drypetes alba Poit. | DRAL5 |
| Caliche sandmat | Chamaesyce velleriflora (Klotzsch & Garcke) Millsp. | CHVE11 |
| California copperleaf | Acalypha californica Benth. | ACCA3 |
| California croton | Croton californicus Muell.-Arg. | CRCA5 |
| California croton | Croton californicus Muell.-Arg. var. californicus | CRCAC |
| California croton | Croton californicus Muell.-Arg. var. tenuis (S. Wats.) Ferguson | CRCAT |
| California silverbush | Argythamnia californica Brandeg. | ARCA19 |
| candelabra Tree | Euphorbia cooperi N.E. Br. ex A. Berger | EUCO41 |
| candelilla | Euphorbia antisyphilitica Zucc. | EUAN3 |
| Caperonia palustris | Croton palustris L. | CRPA17 |
| cardinal's feather | Acalypha radians Torr. | ACRA |
| Caribbean myrtlecroton | Bernardia dichotoma (Willd.) Muell.-Arg. | BEDI2 |
| Carolina leaf-flower | Phyllanthus caroliniensis Walt. | PHCA9 |
| Carolina leaf-flower | Phyllanthus caroliniensis Walt. ssp. caroliniensis | PHCAC |
| Carolina leaf-flower | Phyllanthus caroliniensis Walt. ssp. saxicola (Small) G.L. Webster | PHCAS |
| Carrizo Mountain sandmat | Chamaesyce pediculifera (Engelm.) Rose & Standl. | CHPE9 |
| carry me seed | Phyllanthus amarus Schumacher & Thonn. | PHAM5 |
| cascarilla | Croton eluteria (L.) Sw. | CREL7 |
| cassava | Manihot esculenta Crantz | MAES |
| cassava | Manihot P. Mill. | MANIH |
| castorbean | Ricinus communis L. | RICO3 |
| cataract vaupesia | Vaupesia cataractarum R. E. Schultes | VACA12 |
| catch me if you can | Acalypha amentacea Roxb. | ACAM2 |
| catnip noseburn | Tragia nepetifolia Cav. | TRNE |
| catnip noseburn | Tragia nepetifolia Cav. var. dissecta Muell.-Arg. | TRNED |
| ceara rubbertree | Manihot glaziovii Muell.-Arg. | MAGL5 |
| cedro macho | Hyeronima clusioides (Tul.) Griseb. | HYCL |
| Chamaesyce ?keyensis | Chamaesyce porteriana Small var. keyensis (Small) Burch | CHPOK |
| Chamaesyce ?keyensis | Euphorbia porteriana (Small) Oudejans var. keyensis (Small) Oudejans | EUPOK |
| Chamaesyce abramsiana | Euphorbia abramsiana L.C. Wheeler | EUAB |
| Chamaesyce acuta | Euphorbia acuta Engelm. nom. illeg. | EUAC |
| Chamaesyce acuta | Euphorbia georgei Oudejans | EUGE3 |
| Chamaesyce adenoptera ssp. pergamena | Chamaesyce monensis Millsp. | CHMO3 |
| Chamaesyce adenoptera ssp. pergamena | Euphorbia adenoptera Bertol. ssp. pergamena (Small) Oudejans | EUADP |
| Chamaesyce adenoptera ssp. pergamena | Euphorbia pergamena Small | EUPE11 |
| Chamaesyce albomarginata | Euphorbia albomarginata Torr. & Gray | EUAL4 |
| Chamaesyce angusta | Euphorbia angusta Engelm. | EUAN2 |
| Chamaesyce arizonica | Chamaesyce versicolor (Greene) J.B.S. Norton | CHVE8 |
| Chamaesyce arizonica | Euphorbia arizonica Engelm. | EUAR2 |
| Chamaesyce arizonica | Euphorbia versicolor Greene | EUVE5 |
| Chamaesyce arnottiana | Anisophyllum virgatum Klotzsch & Garcke | ANVI9 |
| Chamaesyce arnottiana | Chamaesyce hookeri (Steud.) Arthur | CHHO5 |
| Chamaesyce arnottiana | Euphorbia arnottiana Endl. | EUAR4 |
| Chamaesyce arnottiana | Euphorbia hookeri Steud. | EUHO2 |
| Chamaesyce arnottiana | Euphorbia hookeri Steud. var. typica Sherff | EUHOT |
| Chamaesyce arnottiana | Euphorbia myrtifolia Hook. & Arn. | EUMY4 |
| Chamaesyce articulata | Chamaesyce linearis (Retz.) Millsp. | CHLI8 |
| Chamaesyce articulata | Chamaesyce vahlii (Willd. ex Klotzsch & Garcke) P. Wilson | CHVA5 |
| Chamaesyce articulata | Euphorbia articulata Brum. | EUAR5 |
| Chamaesyce articulata | Euphorbia linearis Retz. | EULI4 |
| Chamaesyce astyla | Euphorbia astyla Engelm. ex Boiss. | EUAS2 |
| Chamaesyce atrococca | Chamaesyce atrococca (Heller) Croizat & Deg. var. kilaueana (Sherff) O.& I. Deg. | CHATK |
| Chamaesyce atrococca | Chamaesyce atrococca (Heller) Croizat & Deg. var. kokeeana (Sherff) O.& I. Deg. | CHATK2 |
| Chamaesyce atrococca | Euphorbia atrococca Heller | EUAT2 |
| Chamaesyce atrococca | Euphorbia atrococca Heller var. kilaueana Sherff | EUATK |
| Chamaesyce atrococca | Euphorbia atrococca Heller var. kokeeana Sherff | EUATK2 |
| Chamaesyce atrococca | Euphorbia atrococca Heller var. typica Sherff | EUATT |
| Chamaesyce atrococca | Euphorbia celastroides Boiss. var. pseudoniuensis O. Deg. & Sherff | EUCEP |
| Chamaesyce atrococca | Euphorbia multiformis Hook. & Arn. var. mohihiensis Sherff | EUMUM3 |
| Chamaesyce berteriana | Euphorbia berteriana Balbis ex Spreng. | EUBE3 |
| Chamaesyce berteriana | Euphorbia stipitata Millsp. | EUST8 |
| Chamaesyce blodgettii | Chamaesyce chiogenes Small | CHCH4 |
| Chamaesyce blodgettii | Chamaesyce nashii Small | CHNA4 |
| Chamaesyce blodgettii | Euphorbia blodgettii Engelm. ex A.S. Hitchc. | EUBL |
| Chamaesyce blodgettii | Euphorbia chiogenes (Small) Oudejans | EUCH6 |
| Chamaesyce bombensis | Chamaesyce ammannioides (Kunth) Small | CHAM5 |
| Chamaesyce bombensis | Chamaesyce ingallsii Small | CHIN9 |
| Chamaesyce bombensis | Euphorbia ammannioides Kunth | EUAM2 |
| Chamaesyce bombensis | Euphorbia bombensis Jacq. | EUBO9 |
| Chamaesyce capitellata | Chamaesyce pycnanthema (Engelm.) Millsp. | CHPY3 |
| Chamaesyce capitellata | Euphorbia capitellata Engelm. | EUCA6 |
| Chamaesyce capitellata | Euphorbia pycnanthema Engelm. | EUPY |
| Chamaesyce carunculata | Euphorbia carunculata Waterfall | EUCA7 |
| Chamaesyce celastroides var. amplectens | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. halawana (Sherff) O.& I. Deg. | CHCEH2 |
| Chamaesyce celastroides var. amplectens | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. ingrata (O. Deg. & Sherff) O.& I. Deg. | CHCEI |
| Chamaesyce celastroides var. amplectens | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. kohalana (Sherff) O.& I. Deg. | CHCEK2 |
| Chamaesyce celastroides var. amplectens | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. saxicola (O. Deg. & Sherff) O.& I. Deg. | CHCES2 |
| Chamaesyce celastroides var. amplectens | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. waikoluensis (Sherff) O.& I. Deg. | CHCEW |
| Chamaesyce celastroides var. amplectens | Chamaesyce multiformis (Gaud. ex Hook. & Arn.) Croizat & Deg. var. manoana (Sherff) O.& I. Deg. | CHMUM3 |
| Chamaesyce celastroides var. amplectens | Euphorbia celastroides Boiss. var. amplectens Sherff | EUCEA |
| Chamaesyce celastroides var. amplectens | Euphorbia celastroides Boiss. var. halawana Sherff | EUCEH |
| Chamaesyce celastroides var. amplectens | Euphorbia celastroides Boiss. var. ingrata O. Deg. & Sherff | EUCEI |
| Chamaesyce celastroides var. amplectens | Euphorbia celastroides Boiss. var. kohalana Sherff | EUCEK3 |
| Chamaesyce celastroides var. amplectens | Euphorbia celastroides Boiss. var. saxicola O. Deg. & Sherff | EUCES |
| Chamaesyce celastroides var. amplectens | Euphorbia celastroides Boiss. var. waikoluensis Sherff | EUCEW |
| Chamaesyce celastroides var. amplectens | Euphorbia multiformis Hook. & Arn. var. manoana Sherff | EUMUM |
| Chamaesyce celastroides var. celastroides | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. hathewayi Sherff | CHCEH3 |
| Chamaesyce celastroides var. celastroides | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. haupuana (Sherff) O.& I. Deg. | CHCEH4 |
| Chamaesyce celastroides var. celastroides | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. humbertii (Sherff) O.& I. Deg. | CHCEH5 |
| Chamaesyce celastroides var. celastroides | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. nematopoda (Sherff) O.& I. Deg. | CHCEN |
| Chamaesyce celastroides var. celastroides | Euphorbia celastroides Boiss. | EUCE |
| Chamaesyce celastroides var. celastroides | Euphorbia celastroides Boiss. var. haupuana Sherff | EUCEH4 |
| Chamaesyce celastroides var. celastroides | Euphorbia celastroides Boiss. var. humbertii Sherff | EUCEH5 |
| Chamaesyce celastroides var. celastroides | Euphorbia celastroides Boiss. var. nematopoda Sherff | EUCEN2 |
| Chamaesyce celastroides var. celastroides | Euphorbia celastroides Boiss. var. typica Sherff | EUCET |
| Chamaesyce celastroides var. hanapepensis | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. nelsonii (St. John) Raju & Rao | CHCEN3 |
| Chamaesyce celastroides var. hanapepensis | Euphorbia celastroides Boiss. var. hanapepensis Sherff | EUCEH2 |
| Chamaesyce celastroides var. hanapepensis | Euphorbia celastroides Boiss. var. nelsonii St. John | EUCEN |
| Chamaesyce celastroides var. hanapepensis | Euphorbia rivularis Heller | EURI2 |
| Chamaesyce celastroides var. kaenana | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. niuensis (Sherff) O.& I. Deg. | CHCEN2 |
| Chamaesyce celastroides var. kaenana | Euphorbia celastroides Boiss. var. kaenana Sherff | EUCEK |
| Chamaesyce celastroides var. kaenana | Euphorbia celastroides Boiss. var. niuensis Sherff | EUCEN3 |
| Chamaesyce celastroides var. laehiensis | Euphorbia celastroides Boiss. var. laehiensis O.& I. Deg. & Sherff | EUCEL |
| Chamaesyce celastroides var. lorifolia | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. mauiensis (Sherff) O.& I. Deg. | CHCEM |
| Chamaesyce celastroides var. lorifolia | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. odonatoides (O. Deg. & Sherff) O.& I. Deg. | CHCEO |
| Chamaesyce celastroides var. lorifolia | Euphorbia celastroides Boiss. var. lorifolia (Gray) Sherff | EUCEL2 |
| Chamaesyce celastroides var. lorifolia | Euphorbia celastroides Boiss. var. mauiensis Sherff | EUCEM |
| Chamaesyce celastroides var. lorifolia | Euphorbia celastroides Boiss. var. odonatoides O. Deg. & Sherff | EUCEO |
| Chamaesyce celastroides var. lorifolia | Euphorbia lorifolia (Gray) Hbd. | EULO5 |
| Chamaesyce celastroides var. lorifolia | Euphorbia multiformis Hook. & Arn. var. lorifolia Gray | EUMUL |
| Chamaesyce celastroides var. stokesii | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. kealiana (Sherff) O.& I. Deg. | CHCEK3 |
| Chamaesyce celastroides var. stokesii | Chamaesyce celastroides (Boiss.) Croizat & Deg. var. moomomiana (Sherff) O.& I. Deg. | CHCEM2 |
| Chamaesyce celastroides var. stokesii | Euphorbia celastroides Boiss. var. kealiana Sherff | EUCEK2 |
| Chamaesyce celastroides var. stokesii | Euphorbia celastroides Boiss. var. moomomiana Sherff | EUCEM2 |
| Chamaesyce celastroides var. stokesii | Euphorbia celastroides Boiss. var. stokesii (Forbes) Sherff | EUCES2 |
| Chamaesyce celastroides var. tomentella | Chamaesyce multiformis (Gaud. ex Hook. & Arn.) Croizat & Deg. var. kaalana (Sherff) O.& I. Deg. | CHMUK |
| Chamaesyce celastroides var. tomentella | Chamaesyce multiformis (Gaud. ex Hook. & Arn.) Croizat & Deg. var. perdita (Sherff) O.& I. Deg. | CHMUP |
| Chamaesyce celastroides var. tomentella | Chamaesyce multiformis (Gaud. ex Hook. & Arn.) Croizat & Deg. var. tomentella (Boiss.) O.& I. Deg. | CHMUT |
| Chamaesyce celastroides var. tomentella | Euphorbia celastroides Boiss. var. tomentella (Boiss.) Oudejans | EUCET2 |
| Chamaesyce celastroides var. tomentella | Euphorbia multiformis Hook. & Arn. var. kaalana Sherff | EUMUK |
| Chamaesyce celastroides var. tomentella | Euphorbia multiformis Hook. & Arn. var. perdita Sherff | EUMUP |
| Chamaesyce celastroides var. tomentella | Euphorbia multiformis Hook. & Arn. var. tomentella Boiss. | EUMUT |
| Chamaesyce celastroides var. tomentella | Euphorbia oahuensis Skottsberg | EUOA2 |
| Chamaesyce chaetocalyx var. chaetocalyx | Chamaesyce fendleri (Torr. & Gray) Small var. chaetocalyx (Boiss.) Shinners | CHFEC |
| Chamaesyce chaetocalyx var. chaetocalyx | Euphorbia chaetocalyx (Boiss.) Tidestrom | EUCH10 |
| Chamaesyce chaetocalyx var. chaetocalyx | Euphorbia fendleri Torr. & Gray var. chaetocalyx Boiss. | EUFEC |
| Chamaesyce chaetocalyx var. triligulata | Chamaesyce fendleri (Torr. & Gray) Small var. triligulata (L.C. Wheeler) Shinners | CHFET |
| Chamaesyce chaetocalyx var. triligulata | Euphorbia chaetocalyx (Boiss.) Tidestrom var. triligulata (L.C. Wheeler) M.C. Johnston | EUCHT |
| Chamaesyce chaetocalyx var. triligulata | Euphorbia fendleri Torr. & Gray var. triligulata L.C. Wheeler | EUFET |
| Chamaesyce cinerascens | Euphorbia cinerascens Engelm. | EUCI2 |
| Chamaesyce clusiifolia | Anisophyllum nodosum Klotzsch & Garcke | ANNO3 |
| Chamaesyce clusiifolia | Chamaesyce forbesii (Sherff) Croizat & Deg. | CHFO5 |
| Chamaesyce clusiifolia | Euphorbia clusiifolia Hook. & Arn. | EUCL3 |
| Chamaesyce clusiifolia | Euphorbia forbesii Sherff | EUFO |
| Chamaesyce conferta | Euphorbia conferta (Small) B.E. Sm. | EUCO12 |
| Chamaesyce cordifolia | Euphorbia cordifolia Ell. | EUCO9 |
| Chamaesyce cowellii | Euphorbia cowellii (Millsp. ex Britt.) Oudejans | EUCO21 |
| Chamaesyce cumulicola | Euphorbia cumulicola (Small) Oudejans | EUCU4 |
| Chamaesyce degeneri | Anisophyllum cordatum (Meyen) Klotzsch & Garcke | ANCO22 |
| Chamaesyce degeneri | Chamaesyce cordata (Klotzsch & Garcke) Arthur | CHCO18 |
| Chamaesyce degeneri | Chamaesyce degeneri (Sherff) Croizat & Deg. var. molokaiensis (Sherff) O. Deg. & Croizat | CHDEM |
| Chamaesyce degeneri | Euphorbia cordata Klotzsch & Garcke | EUCO22 |
| Chamaesyce degeneri | Euphorbia degeneri Sherff | EUDE5 |
| Chamaesyce degeneri | Euphorbia degeneri Sherff var. molokaiensis Sherff | EUDEM |
| Chamaesyce degeneri | Euphorbia degeneri Sherff var. typica Sherff | EUDET |
| Chamaesyce deltoidea ssp. adhaerens | Chamaesyce adhaerens Small | CHAD2 |
| Chamaesyce deltoidea ssp. adhaerens | Chamaesyce deltoidea (Engelm. ex Chapman) Small var. adhaerens (Small) Burch | CHDEA3 |
| Chamaesyce deltoidea ssp. deltoidea | Euphorbia deltoidea Engelm. ex Chapman | EUDE6 |
| Chamaesyce deltoidea ssp. pinetorum | Chamaesyce pinetorum Small | CHPI3 |
| Chamaesyce deltoidea ssp. pinetorum | Euphorbia smallii Oudejans | EUSM |
| Chamaesyce deltoidea ssp. serpyllum | Chamaesyce serpyllum Small | CHSE10 |
| Chamaesyce deltoidea ssp. serpyllum | Euphorbia deltoidea Engelm. ex Chapman var. serpyllum (Small) Oudejans | EUDES |
| Chamaesyce deppeana | Anisophyllum californicum Klotzsch & Garcke | ANCA17 |
| Chamaesyce deppeana | Chamaesyce festiva (Sherff) Croizat & Deg. | CHFE4 |
| Chamaesyce deppeana | Euphorbia deppeana Boiss. | EUDE7 |
| Chamaesyce deppeana | Euphorbia festiva Sherff | EUFE5 |
| Chamaesyce deppeana | Euphorbia pauciflora Nutt. ex Seem., non Dufour | EUPA7 |
| Chamaesyce dioica | Chamaesyce indivisa (Engelm.) Millsp. | CHIN10 |
| Chamaesyce dioica | Euphorbia indivisa (Engelm.) Tidestrom | EUIN3 |
| Chamaesyce fendleri | Euphorbia fendleri Torr. & Gray | EUFE2 |
| Chamaesyce fendleri | Euphorbia fendleri Torr. & Gray var. typica L.C. Wheeler | EUFET2 |
| Chamaesyce florida | Euphorbia florida Engelm. | EUFL2 |
| Chamaesyce garberi | Chamaesyce adicioides Small | CHAD3 |
| Chamaesyce garberi | Chamaesyce brachypoda Small | CHBR5 |
| Chamaesyce garberi | Chamaesyce mosieri Small | CHMO5 |
| Chamaesyce garberi | Euphorbia garberi Engelm. ex Chapman | EUGA |
| Chamaesyce geyeri var. geyeri | Euphorbia geyeri Engelm. & Gray | EUGE |
| Chamaesyce geyeri var. wheeleriana | Euphorbia geyeri Engelm. & Gray var. wheeleriana Warnock & M.C. Johnston | EUGEW |
| Chamaesyce glyptosperma | Euphorbia glyptosperma Engelm. | EUGL3 |
| Chamaesyce golondrina | Euphorbia golondrina L.C. Wheeler | EUGO3 |
| Chamaesyce gracillima | Euphorbia gracillima S. Wats. | EUGR3 |
| Chamaesyce halemanui | Chamaesyce remyi (Gray ex Boiss.) Croizat & Deg. var. leptopoda (Sherff) O.& I. Deg. | CHREL |
| Chamaesyce halemanui | Chamaesyce remyi (Gray ex Boiss.) Croizat & Deg. var. molesta (Sherff) O.& I. Deg. | CHREM |
| Chamaesyce halemanui | Chamaesyce remyi (Gray ex Boiss.) Croizat & Deg. var. wilkesii (Sherff) O.& I. Deg. | CHREW |
| Chamaesyce halemanui | Euphorbia halemanui Sherff | EUHA3 |
| Chamaesyce halemanui | Euphorbia remyi Gray ex Boiss. var. leptopoda Sherff | EUREL |
| Chamaesyce halemanui | Euphorbia remyi Gray ex Boiss. var. molesta Sherff | EUREM |
| Chamaesyce halemanui | Euphorbia remyi Gray ex Boiss. var. wilkesii Sherff | EUREW3 |
| Chamaesyce herbstii | Chamaesyce forbesii (Sherff) Croizat & Deg. var. grandifolia Hbd. | CHFOG |
| Chamaesyce herbstii | Chamaesyce rockii (Forbes) Croizat & Deg. var. grandifolia (Hbd.) Koutnik | CHROG |
| Chamaesyce herbstii | Euphorbia herbstii (W.L. Wagner) Oudejans | EUHE6 |
| Chamaesyce herbstii | Euphorbia rockii Forbes var. grandifolia (Hbd.) Oudejans | EUROG |
| Chamaesyce hirta | Euphorbia hirta L. | EUHI |
| Chamaesyce hirta | Euphorbia pilulifera auct. non L. [misapplied] | EUPI7 |
| Chamaesyce hooveri | Euphorbia hooveri L.C. Wheeler | EUHO |
| Chamaesyce humistrata | Euphorbia humistrata Engelm. ex Gray | EUHU |
| Chamaesyce hypericifolia | Chamaesyce glomerifera Millsp. | CHGL10 |
| Chamaesyce hypericifolia | Euphorbia bifida auct. non Hook. & Arn. [misapplied] | EUBI5 |
| Chamaesyce hypericifolia | Euphorbia glomerifera (Millsp.) L.C. Wheeler | EUGL14 |
| Chamaesyce hypericifolia | Euphorbia hypericifolia L. | EUHY3 |
| Chamaesyce hyssopifolia | Chamaesyce brasiliensis (Lam.) Small | CHBR7 |
| Chamaesyce hyssopifolia | Euphorbia brasiliensis Lam. | EUBR3 |
| Chamaesyce hyssopifolia | Euphorbia hyssopifolia L. | EUHY2 |
| Chamaesyce jejuna | Euphorbia jejuna M.C. Johnston & Warnock | EUJE |
| Chamaesyce kuwaleana | Euphorbia kuwaleana O. Deg. & Sherff | EUKU |
| Chamaesyce laredana | Euphorbia laredana Millsp. | EULA2 |
| Chamaesyce lasiocarpa | Euphorbia lasiocarpa Klotzsch | EULA6 |
| Chamaesyce lata | Euphorbia lata Engelm. | EULA3 |
| Chamaesyce maculata | Chamaesyce mathewsii Small | CHMA10 |
| Chamaesyce maculata | Chamaesyce supina (Raf.) Hara | CHSU13 |
| Chamaesyce maculata | Chamaesyce tracyi Small | CHTR10 |
| Chamaesyce maculata | Euphorbia maculata L. | EUMA7 |
| Chamaesyce maculata | Euphorbia supina Raf. | EUSU |
| Chamaesyce melanadenia | Euphorbia melanadenia Torr. | EUME3 |
| Chamaesyce mendezii | Euphorbia mendezii Boiss. | EUME6 |
| Chamaesyce mesembrianthemifolia | Chamaesyce buxifolia (Lam.) Small | CHBU4 |
| Chamaesyce mesembrianthemifolia | Euphorbia buxifolia Lam. | EUBU |
| Chamaesyce mesembrianthemifolia | Euphorbia mesembrianthemifolia Jacq. | EUME7 |
| Chamaesyce micromera | Euphorbia micromera Boiss. ex Engelm. | EUMI3 |
| Chamaesyce missurica | Chamaesyce missurica (Raf.) Shinners var. calcicola Shinners | CHMIC |
| Chamaesyce missurica | Chamaesyce missurica (Raf.) Shinners var. petaloidea (Engelm.) Dorn | CHMIP |
| Chamaesyce missurica | Chamaesyce nuttallii (Engelm.) Small | CHNU3 |
| Chamaesyce missurica | Chamaesyce petaloidea (Engelm.) Small | CHPE7 |
| Chamaesyce missurica | Chamaesyce zygophylloides (Boiss.) Small | CHZY |
| Chamaesyce missurica | Euphorbia missurica Raf. | EUMI5 |
| Chamaesyce missurica | Euphorbia missurica Raf. var. intermedia (Engelm.) L.C. Wheeler | EUMII |
| Chamaesyce missurica | Euphorbia missurica Raf. var. petaloidea (Engelm.) Dorn | EUMIP |
| Chamaesyce missurica | Euphorbia nuttallii (Engelm.) Small | EUNU2 |
| Chamaesyce missurica | Euphorbia petaloidea Engelm. | EUPE14 |
| Chamaesyce multiformis var. microphylla | Euphorbia multiformis Hook. & Arn. var. microphylla Boiss. | EUMUM2 |
| Chamaesyce multiformis var. microphylla | Euphorbia multiformis Hook. & Arn. var. tenuior Gray | EUMUT2 |
| Chamaesyce multiformis var. multiformis | Anisophyllum multiforme (Hook. & Arn.) Klotzsch & Garcke | ANMU7 |
| Chamaesyce multiformis var. multiformis | Chamaesyce arnottiana (Endl.) O.& I. Deg. var. integrifolia (Hbd.) O.& I. Deg. | CHARI |
| Chamaesyce multiformis var. multiformis | Chamaesyce hillebrandii (Levl.) Croizat & Deg. | CHHI7 |
| Chamaesyce multiformis var. multiformis | Chamaesyce hillebrandii (Levl.) Croizat & Deg. var. palikeana (O. Deg. & Sherff) O.& I. Deg. | CHHIP |
| Chamaesyce multiformis var. multiformis | Chamaesyce hillebrandii (Levl.) Croizat & Deg. var. waimanoana (Sherff) O.& I. Deg. | CHHIW |
| Chamaesyce multiformis var. multiformis | Euphorbia arnottiana Endl. var. integrifolia (Hbd.) St. John | EUARI |
| Chamaesyce multiformis var. multiformis | Euphorbia hillebrandii Levl. | EUHI3 |
| Chamaesyce multiformis var. multiformis | Euphorbia hillebrandii Levl. var. palikeana O. Deg. & Sherff | EUHIP |
| Chamaesyce multiformis var. multiformis | Euphorbia hillebrandii Levl. var. typica Sherff | EUHIT |
| Chamaesyce multiformis var. multiformis | Euphorbia hillebrandii Levl. var. waimanoana Sherff | EUHIW |
| Chamaesyce multiformis var. multiformis | Euphorbia hookeri Steud. var. integrifolia Hbd. | EUHOI |
| Chamaesyce multiformis var. multiformis | Euphorbia multiformis Hook. & Arn. | EUMU2 |
| Chamaesyce multiformis var. multiformis | Euphorbia multiformis Hook. & Arn. var. typica Sherff | EUMUT3 |
| Chamaesyce nutans | Chamaesyce maculata auct. non (L.) Small [misapplied] | CHMA11 |
| Chamaesyce nutans | Chamaesyce preslii (Guss.) Arthur | CHPR9 |
| Chamaesyce nutans | Euphorbia maculata auct. non L. [misapplied] | EUMA14 |
| Chamaesyce nutans | Euphorbia nutans Lag. | EUNU |
| Chamaesyce nutans | Euphorbia preslii Guss. | EUPR6 |
| Chamaesyce ocellata ssp. arenicola | Chamaesyce ocellata (Dur. & Hilg.) Millsp. var. arenicola (Parish) N.& P. Holmgren | CHOCA2 |
| Chamaesyce ocellata ssp. arenicola | Euphorbia ocellata Dur. & Hilg. ssp. arenicola (Parish) Oudejans | EUOCA2 |
| Chamaesyce ocellata ssp. arenicola | Euphorbia ocellata Dur. & Hilg. var. arenicola (Parish) Jepson | EUOCA |
| Chamaesyce ocellata ssp. arenicola | Euphorbia ocellata Dur. & Hilg. var. kirbyi J.T. Howell | EUOCK |
| Chamaesyce ocellata ssp. ocellata | Euphorbia ocellata Dur. & Hilg. | EUOC3 |
| Chamaesyce ocellata ssp. rattanii | Euphorbia ocellata Dur. & Hilg. var. rattanii (S. Wats.) L.C. Wheeler | EUOCR |
| Chamaesyce olowaluana | Chamaesyce olowaluana (Sherff) Croizat & Deg. var. gracilis (Rock) O.& I. Deg. | CHOLG |
| Chamaesyce olowaluana | Chamaesyce olowaluana (Sherff) Croizat & Deg. var. lepidofolia (O. Deg. & Sherff) O.& I. Deg. | CHOLL |
| Chamaesyce olowaluana | Euphorbia lorifolia (Gray) Hbd. var. gracilis Rock | EULOG |
| Chamaesyce olowaluana | Euphorbia olowaluana Sherff | EUOL |
| Chamaesyce olowaluana | Euphorbia olowaluana Sherff var. gracilis (Rock) Sherff | EUOLG |
| Chamaesyce olowaluana | Euphorbia olowaluana Sherff var. lepidofolia O. Deg. & Sherff | EUOLL2 |
| Chamaesyce olowaluana | Euphorbia olowaluana Sherff var. typica Sherff | EUOLT |
| Chamaesyce ophthalmica | Chamaesyce gemella (Lag.) Small | CHGE3 |
| Chamaesyce ophthalmica | Euphorbia gemella Lag. | EUGE4 |
| Chamaesyce ophthalmica | Euphorbia hirta L. var. procumbens (DC.) N.E. Br. | EUHIP2 |
| Chamaesyce ophthalmica | Euphorbia ophthalmica Pers. | EUOP |
| Chamaesyce parishii | Euphorbia parishii Greene | EUPA5 |
| Chamaesyce parryi | Euphorbia parryi Engelm. | EUPA6 |
| Chamaesyce pediculifera | Euphorbia pediculifera Engelm. | EUPE4 |
| Chamaesyce perennans | Euphorbia perennans (Shinners) Warnock & M.C. Johnston | EUPE7 |
| Chamaesyce platysperma | Euphorbia platysperma Engelm. ex S. Wats. | EUPL2 |
| Chamaesyce polycarpa | Chamaesyce polycarpa (Benth.) Millsp. ex Parish var. hirtella (Boiss.) Millsp. ex Parish | CHPOH |
| Chamaesyce polycarpa | Euphorbia polycarpa Benth. | EUPO3 |
| Chamaesyce polycarpa | Euphorbia polycarpa Benth. var. hirtella Boiss. | EUPOH |
| Chamaesyce polygonifolia | Euphorbia polygonifolia L. | EUPO4 |
| Chamaesyce porteriana var. porteriana | Euphorbia porteriana (Small) Oudejans | EUPO8 |
| Chamaesyce porteriana var. scoparia | Chamaesyce scoparia Small | CHSC7 |
| Chamaesyce porteriana var. scoparia | Euphorbia porteriana (Small) Oudejans var. scoparia (Small) Oudejans | EUPOS2 |
| Chamaesyce prostrata | Euphorbia chamaesyce auct. non L. [misapplied] | EUCH7 |
| Chamaesyce prostrata | Euphorbia prostrata Ait. | EUPR3 |
| Chamaesyce remyi var. hanaleiensis | Euphorbia remyi Gray ex Boiss. var. hanaleiensis Sherff | EUREH |
| Chamaesyce remyi var. kauaiensis | Euphorbia remyi Gray ex Boiss. var. kauaiensis O. Deg. & Sherff | EUREK2 |
| Chamaesyce remyi var. remyi | Chamaesyce remyi (Gray ex Boiss.) Croizat & Deg. var. kahiliana (Sherff) O.& I. Deg. | CHREK2 |
| Chamaesyce remyi var. remyi | Chamaesyce remyi (Gray ex Boiss.) Croizat & Deg. var. lydgatei (Sherff) O.& I. Deg. | CHREL2 |
| Chamaesyce remyi var. remyi | Chamaesyce remyi (Gray ex Boiss.) Croizat & Deg. var. olokelensis (Skottsberg & Sherff) O.& I. Deg. | CHREO |
| Chamaesyce remyi var. remyi | Chamaesyce remyi (Gray ex Boiss.) Croizat & Deg. var. pteropoda (Sherff) O.& I. Deg. | CHREP |
| Chamaesyce remyi var. remyi | Chamaesyce remyi (Gray ex Boiss.) Croizat & Deg. var. wahiawana (Sherff) O.& I. Deg. | CHREW3 |
| Chamaesyce remyi var. remyi | Chamaesyce remyi (Gray ex Boiss.) Croizat & Deg. var. waimeana (Sherff) O.& I. Deg. | CHREW2 |
| Chamaesyce remyi var. remyi | Euphorbia remyi Gray ex Boiss. | EURE6 |
| Chamaesyce remyi var. remyi | Euphorbia remyi Gray ex Boiss. var. kahiliana Sherff | EUREK |
| Chamaesyce remyi var. remyi | Euphorbia remyi Gray ex Boiss. var. lydgatei Sherff | EUREL2 |
| Chamaesyce remyi var. remyi | Euphorbia remyi Gray ex Boiss. var. olokelensis Skottsberg & Sherff | EUREO |
| Chamaesyce remyi var. remyi | Euphorbia remyi Gray ex Boiss. var. pteropoda Sherff | EUREP |
| Chamaesyce remyi var. remyi | Euphorbia remyi Gray ex Boiss. var. wahiawana Sherff | EUREW |
| Chamaesyce remyi var. remyi | Euphorbia remyi Gray ex Boiss. var. waimeana Sherff | EUREW2 |
| Chamaesyce revoluta | Euphorbia revoluta Engelm. | EURE4 |
| Chamaesyce rockii | Euphorbia rockii Forbes | EURO6 |
| Chamaesyce serpens | Euphorbia serpens Kunth | EUSE4 |
| Chamaesyce serpyllifolia ssp. hirtella | Euphorbia serpyllifolia Pers. ssp. hirtella (Engelm. ex S. Wats.) Oudejans | EUSEH |
| Chamaesyce serpyllifolia ssp. hirtella | Euphorbia serpyllifolia Pers. var. hirtella (Engelm. ex S. Wats.) L.C. Wheeler | EUSEH2 |
| Chamaesyce serpyllifolia ssp. serpyllifolia | Chamaesyce albicaulis (Rydb.) Rydb. | CHAL12 |
| Chamaesyce serpyllifolia ssp. serpyllifolia | Chamaesyce neomexicana (Greene) Standl. | CHNE9 |
| Chamaesyce serpyllifolia ssp. serpyllifolia | Euphorbia neomexicana Greene | EUNE5 |
| Chamaesyce serpyllifolia ssp. serpyllifolia | Euphorbia serpyllifolia Pers. | EUSE5 |
| Chamaesyce serrula | Euphorbia serrula Engelm. | EUSE6 |
| Chamaesyce setiloba | Euphorbia setiloba Engelm. ex Torr. | EUSE7 |
| Chamaesyce simulans | Chamaesyce polycarpa (Benth.) Millsp. ex Parish var. simulans (L.C. Wheeler) Shinners | CHPOS2 |
| Chamaesyce simulans | Euphorbia polycarpa Benth. var. simulans L.C. Wheeler | EUPOS |
| Chamaesyce simulans | Euphorbia simulans (L.C. Wheeler) Warnock & M.C. Johnston | EUSI5 |
| Chamaesyce skottsbergii var. skottsbergii | Chamaesyce skottsbergii (Sherff) Croizat & Deg. var. audens (Sherff) O.& I. Deg. | CHSKA |
| Chamaesyce skottsbergii var. skottsbergii | Chamaesyce skottsbergii (Sherff) Croizat & Deg. var. kalaeloana (Sherff) O.& I. Deg. | CHSKK |
| Chamaesyce skottsbergii var. skottsbergii | Euphorbia skottsbergii Sherff | EUSK |
| Chamaesyce skottsbergii var. skottsbergii | Euphorbia skottsbergii Sherff var. audens Sherff | EUSKA |
| Chamaesyce skottsbergii var. skottsbergii | Euphorbia skottsbergii Sherff var. kalaeloana Sherff | EUSKK |
| Chamaesyce skottsbergii var. skottsbergii | Euphorbia skottsbergii Sherff var. typica Sherff | EUSKT |
| Chamaesyce skottsbergii var. vaccinioides | Chamaesyce multiformis (Gaud. ex Hook. & Arn.) Croizat & Deg. var. haleakalana (Sherff) O.& I. Deg. | CHMUH |
| Chamaesyce skottsbergii var. vaccinioides | Chamaesyce multiformis (Gaud. ex Hook. & Arn.) Croizat & Deg. var. kapuleiensis (O. Deg. & Sherff) O. Deg. & Sherff | CHMUK2 |
| Chamaesyce skottsbergii var. vaccinioides | Euphorbia multiformis Hook. & Arn. var. haleakalana Sherff | EUMUH |
| Chamaesyce skottsbergii var. vaccinioides | Euphorbia multiformis Hook. & Arn. var. kapuleiensis O. Deg. & Sherff | EUMUK2 |
| Chamaesyce sparsiflora | Chamaesyce multiformis (Gaud. ex Hook. & Arn.) Croizat & Deg. var. sparsiflora (Heller) O.& I. Deg. | CHMUS |
| Chamaesyce sparsiflora | Euphorbia multiformis Hook. & Arn. var. sparsiflora (Heller) Sherff | EUMUS |
| Chamaesyce sparsiflora | Euphorbia sparsiflora Heller | EUSP2 |
| Chamaesyce stictospora | Euphorbia stictospora Engelm. | EUST4 |
| Chamaesyce theriaca | Euphorbia theriaca L.C. Wheeler | EUTH |
| Chamaesyce thymifolia | Anisophyllum thymifolium (L.) Klotzsch & Garcke | ANTH4 |
| Chamaesyce thymifolia | Euphorbia thymifolia L. | EUTH2 |
| Chamaesyce torralbasii | Euphorbia torralbasii Urban [excluded] | EUTO12 |
| Chamaesyce trachysperma | Euphorbia trachysperma Engelm. | EUTR2 |
| Chamaesyce turpinii | Chamaesyce albescens (Urban) Millsp. | CHAL13 |
| Chamaesyce turpinii | Chamaesyce anegadensis Millsp. | CHAN7 |
| Chamaesyce turpinii | Chamaesyce garheana (Boiss.) Millsp. | CHGA4 |
| Chamaesyce turpinii | Chamaesyce portoricensis (Urban) Millsp. | CHPO11 |
| Chamaesyce turpinii | Euphorbia garheana Boiss. [orthographic variant] | EUGA3 |
| Chamaesyce turpinii | Euphorbia garkeana Boiss. | EUGA8 |
| Chamaesyce turpinii | Euphorbia portoricensis Urban | EUPO10 |
| Chamaesyce turpinii | Euphorbia portoricensis Urban var. albescens Urban | EUPOA |
| Chamaesyce turpinii | Euphorbia turpinii Boiss. | EUTU |
| Chamaesyce vallis-mortae | Euphorbia vallis-mortae (Millsp.) J.T. Howell | EUVA |
| Chamaesyce vermiculata | Chamaesyce rafinesquei (Greene) Arthur | CHRA4 |
| Chamaesyce vermiculata | Euphorbia vermiculata Raf. | EUVE |
| Chamaesyce villifera | Euphorbia villifera Scheele | EUVI2 |
| Chamaesyce villifera | Euphorbia villifera Scheele var. nuda Engelm. ex Boiss. | EUVIN |
| chamber bitter | Phyllanthus urinaria L. | PHUR |
| Chapman's spurge | Euphorbia ?chapmanii Oudejans | EUCH5 |
| Charleston Mountain silverbush | Argythamnia cyanophylla (Woot. & Standl.) Ingram | ARCY |
| chaya | Cnidoscolus chayamansa McVaugh | CNCH |
| chekkurmanis | Sauropus androgynus (L.) Merr. | SAAN13 |
| chestnutleaf false croton | Caperonia castaneifolia (L.) St.-Hil. | CACA41 |
| chinalaurel | Antidesma L. | ANTID |
| Chinese caps | Euphorbia crenulata Engelm. | EUCR2 |
| Chinese tallow | Triadica Loureiro | TRIAD2 |
| Chinese tallow | Triadica sebifera (L.) Small | TRSE6 |
| Chiricahua Mountain sandmat | Chamaesyce florida (Engelm.) Millsp. | CHFL3 |
| christplant | Euphorbia milii Des Moulins | EUMI9 |
| chrozophora | Chrozophora A. Juss. | CHROZ |
| Chrozophora tinctoria | Croton tinctoria L. | CRTI4 |
| claoxylon | Claoxylon A. Juss. | CLAOX |
| Claoxylon sandwicense | Claoxylon helleri Sherff | CLHE2 |
| Claoxylon sandwicense | Claoxylon sandwicense Muell.-Arg. var. degeneri Sherff | CLSAD |
| Claoxylon sandwicense | Claoxylon sandwicense Muell.-Arg. var. glabrescens (Sherff) Sherff | CLSAG |
| Claoxylon sandwicense | Claoxylon sandwicense Muell.-Arg. var. hillebrandii Sherff | CLSAH |
| Claoxylon sandwicense | Claoxylon sandwicense Muell.-Arg. var. magnifolium Sherff | CLSAM |
| Claoxylon sandwicense | Claoxylon sandwicense Muell.-Arg. var. tomentosum Hbd. | CLSAT |
| cliff spurge | Euphorbia misera Benth. | EUMI4 |
| cnidoscolus | Cnidoscolus Pohl | CNIDO |
| cnidoscolus | Cnidoscolus urens (L.) Arthur | CNUR |
| Cnidoscolus aconitifolius | Jatropha aconitifolia Miller | JAAC2 |
| Cnidoscolus texanus | Jatropha texana Muell.-Arg. | JATE4 |
| Cnidoscolus urens | Jatropha urens L. | JAUR |
| Cnidoscolus urens var. stimulosus | Bivonea stimulosa (Michx.) Raf. | BIST3 |
| Cnidoscolus urens var. stimulosus | Cnidoscolus stimulosus (Michx.) Engelm. & Gray | CNST |
| Cnidoscolus urens var. stimulosus | Jatropha stimulosa Michx. | JAST2 |
| coastal beach sandmat | Chamaesyce mesembrianthemifolia (Jacq.) Dugand | CHME7 |
| coastal dune sandmat | Chamaesyce cumulicola Small | CHCU4 |
| coastal sand spurge | Euphorbia exserta (Small) Coker | EUEX6 |
| coastal sandmat | Chamaesyce skottsbergii (Sherff) Croizat & Deg. | CHSK |
| coastal sandmat | Chamaesyce skottsbergii (Sherff) Croizat & Deg. var. skottsbergii | CHSKS |
| coastal sandmat | Chamaesyce skottsbergii (Sherff) Croizat & Deg. var. vaccinioides (Sherff) Koutnik | CHSKV |
| codiaeum | Codiaeum Juss. | CODIA |
| Codiaeum variegatum | Codiaeum variegatum (L.) A. Juss. var. pictum (Lodd.) Muell. Arg. | COVAP |
| common bushweed | Flueggea virosa (Roxb. ex Willd.) Voigt | FLVI2 |
| common threeseed mercury | Acalypha rhomboidea Raf. | ACRH |
| Contura Creek sandmat | Chamaesyce ocellata (Dur. & Hilg.) Millsp. | CHOC |
| Contura Creek sandmat | Chamaesyce ocellata (Dur. & Hilg.) Millsp. ssp. arenicola (Parish) Thorne | CHOCA |
| Contura Creek sandmat | Chamaesyce ocellata (Dur. & Hilg.) Millsp. ssp. ocellata | CHOCO |
| copperleaf | Acalypha L. | ACALY |
| coralbush | Jatropha multifida L. | JAMU |
| Cortez's croton | Croton cortesianus Kunth | CRCO9 |
| Cory's croton | Croton coryi Croizat | CRCO10 |
| Cowell's sandmat | Chamaesyce cowellii Millsp. ex Britt. | CHCO8 |
| croton | Croton heterocarpus Muell. Arg. | CRHE4 |
| croton | Croton L. | CROTO |
| croton | Croton ripensis Kanehira & Hatusima | CRRI8 |
| Croton argenteus | Julocroton argenteus (L.) Didr. | JUAR |
| Croton californicus var. californicus | Croton californicus Muell.-Arg. var. longipes (M.E. Jones) Ferguson | CRCAL |
| Croton californicus var. californicus | Croton californicus Muell.-Arg. var. mohavensis Ferguson | CRCAM |
| Croton californicus var. californicus | Croton longipes M.E. Jones | CRLO8 |
| Croton capitatus var. lindheimeri | Croton capitatus Michx. var. albinoides (Ferguson) Shinners | CRCAA |
| Croton capitatus var. lindheimeri | Croton engelmannii Ferguson | CREN3 |
| Croton capitatus var. lindheimeri | Croton engelmannii Ferguson var. albinoides Ferguson | CRENA |
| Croton capitatus var. lindheimeri | Croton lindheimeri (Engelm. & Gray) Engelm. & Gray ex Wood | CRLI10 |
| Croton cascarilla | Croton linearis Jacq. | CRLI4 |
| Croton flavens | Croton flavens L. var. rigidus Muell.-Arg. | CRFLR |
| Croton flavens | Croton rigidus (Muell.-Arg.) Britt. | CRRI2 |
| Croton glandulosus var. floridanus | Croton fergusonii Small | CRFE4 |
| Croton glandulosus var. floridanus | Croton floridanus Ferguson | CRFL14 |
| Croton glandulosus var. glandulosus | Croton arenicola Small | CRAR3 |
| Croton humilis | Croton berlandieri Torr. | CRBE3 |
| Croton incanus | Croton torreyanus auct. non Muell.-Arg. [misapplied] | CRTO5 |
| Croton michauxii | Crotonopsis linearis Michx. | CRLI3 |
| Croton nummulariifolius | Croton microcarpus auct. non Muell.-Arg. [misapplied] | CRMI17 |
| Croton pottsii var. pottsii | Croton corymbulosus Engelm. | CRCO24 |
| Croton setigerus | Eremocarpus setigerus (Hook.) Benth. | ERSE3 |
| Croton trinitatis | Croton miquelensis Ferguson | CRMI6 |
| Croton willdenowii | Crotonopsis elliptica Willd. | CREL2 |
| Cuban copperleaf | Acalypha setosa A. Rich. | ACSE |
| Curtis's spurge | Euphorbia curtisii Engelm. | EUCU3 |
| cushion spurge | Euphorbia epithymoides L. | EUEP |
| cypress spurge | Euphorbia cyparissias L. | EUCY2 |
| dalechampia | Dalechampia L. | DALEC |
| dark noseburn | Tragia nigricans Bush | TRNI |
| Darlington's glade spurge | Euphorbia purpurea (Raf.) Fern. | EUPU4 |
| David's spurge | Euphorbia davidii Subils | EUDA5 |
| Deam's threeseed mercury | Acalypha deamii (Weatherby) Ahles | ACDE4 |
| Death Valley sandmat | Chamaesyce vallis-mortae Millsp. | CHVA4 |
| desert myrtlecroton | Bernardia obovata I.M. Johnston | BEOB |
| desert silverbush | Argythamnia claryana Jepson | ARCL2 |
| desertmountain manihot | Manihot angustiloba (Torr.) Muell.-Arg. | MAAN5 |
| Ditrysinia fruticosa | Sebastiania fruticosa (Bartr.) Fern. | SEFR |
| Ditrysinia fruticosa | Sebastiania ligustrina (Michx.) Muell.-Arg. | SELI7 |
| ditta | Ditta Griseb. | DITTA |
| dixie sandmat | Chamaesyce bombensis (Jacq.) Dugand | CHBO7 |
| dogtooth noseburn | Tragia amblyodonta (Muell.-Arg.) Pax & K. Hoffmann | TRAM9 |
| dove weed | Croton setigerus Hook. | CRSE11 |
| Drummond's leaf-flower | Phyllanthus abnormis Baill. | PHAB |
| Drummond's leaf-flower | Phyllanthus abnormis Baill. var. abnormis | PHABA |
| drypetes | Drypetes Vahl | DRYPE |
| dwarf sandmat | Chamaesyce jejuna (M.C. Johnston & Warnock) Shinners | CHJE |
| dwarf spurge | Euphorbia exigua L. | EUEX3 |
| eggleaf spurge | Euphorbia oblongata Griseb. | EUOB4 |
| Elliott's croton | Croton elliottii Chapman | CREL3 |
| emblic | Phyllanthus emblica L. | PHEM2 |
| Euphorbia ?chapmanii | Euphorbia nudicaulis Chapman | EUNU3 |
| Euphorbia bifurcata | Euphorbia delicatula auct. non Boiss. & Millsp. [misapplied] | EUDE8 |
| Euphorbia bifurcata | Euphorbia wootonii Oudejans | EUWO |
| Euphorbia bifurcata | Zygophyllidium delicatulum Woot. & Standl. | ZYDE2 |
| Euphorbia brachycera | Euphorbia brachycera Engelm. var. robusta (Engelm.) Dorn | EUBRR |
| Euphorbia brachycera | Euphorbia lurida Engelm. | EULU |
| Euphorbia brachycera | Euphorbia montana Engelm. | EUMO10 |
| Euphorbia brachycera | Euphorbia odontadenia Boiss. | EUOD2 |
| Euphorbia brachycera | Euphorbia robusta (Engelm.) Small ex. Britt. & Br. | EURO5 |
| Euphorbia brachycera | Tithymalus brachycera (Engelm.) Small | TIBR |
| Euphorbia brachycera | Tithymalus montanus (Engelm.) Small | TIMO |
| Euphorbia brachycera | Tithymalus robustus (Engelm.) Small | TIRO2 |
| Euphorbia chamaesula | Tithymalus chamaesula (Boiss.) Woot. & Standl. | TICH |
| Euphorbia commutata | Euphorbia commutata Engelm. ex Gray var. erecta J.B.S. Norton | EUCOE |
| Euphorbia commutata | Galarhoeus commutatus (Engelm. ex Gray) Small | GACO8 |
| Euphorbia commutata | Galarhoeus commutatus (Engelm. ex Gray) Small var. erectus (J.B.S. Norton) Small | GACOE2 |
| Euphorbia commutata | Tithymalus commutatus (Engelm. ex Gray) Klotzsch & Garcke | TICO3 |
| Euphorbia corollata | Euphorbia corollata L. var. angustifolia Ell. | EUCOA |
| Euphorbia corollata | Euphorbia marilandica Greene | EUMA16 |
| Euphorbia corollata | Tithymalopsis corollata (L.) Klotzsch | TICO4 |
| Euphorbia corollata | Tithymalopsis marilandica (Greene) Small | TIMA2 |
| Euphorbia corollata | Tithymalopsis olivacea Small | TIOL |
| Euphorbia crenulata | Tithymalus crenulatus (Engelm.) Heller | TICR |
| Euphorbia cuphosperma | Euphorbia dentata Michx. var. cuphosperma (Engelm.) Fern. | EUDEC |
| Euphorbia cuphosperma | Poinsettia cuphosperma Engelm. | POCU8 |
| Euphorbia cuphosperma | Poinsettia dentata (Michx.) Klotzsch & Garcke var. cuphosperma (Engelm.) Mohlenbrock | PODEC |
| Euphorbia curtisii | Tithymalopsis curtisii (Engelm.) Small | TICU |
| Euphorbia curtisii | Tithymalopsis eriogonoides Small | TIER2 |
| Euphorbia cyathophora | Euphorbia barbellata Engelm. | EUBA12 |
| Euphorbia cyathophora | Euphorbia graminifolia Michx. | EUGR18 |
| Euphorbia cyathophora | Euphorbia havanensis Willd. ex Boiss. | EUHA10 |
| Euphorbia cyathophora | Euphorbia heterophylla L. var. barbellata (Engelm.) Holz. | EUHEB |
| Euphorbia cyathophora | Euphorbia heterophylla L. var. cyathophora (Murr.) Griseb. | EUHEC |
| Euphorbia cyathophora | Euphorbia heterophylla L. var. graminifolia (Michx.) Engelm. | EUHEG |
| Euphorbia cyathophora | Poinsettia barbellata Small | POBA12 |
| Euphorbia cyathophora | Poinsettia cyathophora (Murr.) Klotzsch & Garcke | POCY5 |
| Euphorbia cyathophora | Poinsettia cyathophora (Murr.) Klotzsch & Garcke var. graminifolia (Michx.) Mohlenbrock | POCYG |
| Euphorbia cyathophora | Poinsettia graminifolia (Michx.) Millsp. | POGR25 |
| Euphorbia cyathophora | Poinsettia havanensis (Willd. ex Boiss.) Small | POHA9 |
| Euphorbia cyparissias | Galarhoeus cyparissias (L.) Small ex Rydb. | GACY2 |
| Euphorbia cyparissias | Tithymalus cyparissias (L.) Hill | TICY |
| Euphorbia davidii | Euphorbia dentata auct. non Michx. [misapplied] | EUDE16 |
| Euphorbia davidii | Euphorbia dentata Michx. var. gracillima Millsp. | EUDEG |
| Euphorbia davidii | Euphorbia dentata Michx. var. lancifolia Farw. | EUDEL2 |
| Euphorbia decaryi var. capsaintemariensis | Euphorbia cap-saintemariensis Rauh | EUCA28 |
| Euphorbia dentata var. dentata | Anisophyllum dentatum (Michx.) Haw. | ANDE14 |
| Euphorbia dentata var. dentata | Euphorbia dentata Michx. var. linearis Engelm. ex Boiss. | EUDEL3 |
| Euphorbia dentata var. dentata | Euphorbia dentata Michx. var. rigida Engelm. | EUDER |
| Euphorbia dentata var. dentata | Euphorbia herronii Riddell | EUHE11 |
| Euphorbia dentata var. dentata | Poinsettia dentata (Michx.) Klotzsch & Garcke | PODE7 |
| Euphorbia discoidalis | Tithymalopsis discoidalis (Chapman) Small | TIDI3 |
| Euphorbia esula var. esula | Euphorbia intercedens Podp. | EUIN10 |
| Euphorbia esula var. esula | Euphorbia podperae Croizat | EUPO9 |
| Euphorbia esula var. esula | Euphorbia pseudovirgata (Schur) So? | EUPS2 |
| Euphorbia esula var. esula | Galarhoeus esula (L.) Rydb. | GAES |
| Euphorbia esula var. esula | Tithymalus esula (L.) Hill | TIES |
| Euphorbia esula var. uralensis | Euphorbia esula L. ssp. tommasiniana (Bertol.) Kuzmanov | EUEST |
| Euphorbia esula var. uralensis | Euphorbia esula L. var. orientalis Boiss. | EUESO |
| Euphorbia esula var. uralensis | Euphorbia uralensis Fisch. ex Link | EUUR3 |
| Euphorbia esula var. uralensis | Euphorbia virgata Waldst. & Kit., non Desf. | EUVI7 |
| Euphorbia esula var. uralensis | Tithymalus uralensis (Fisch. ex Link) Prokhanov | TIUR2 |
| Euphorbia exserta | Euphorbia gracilior Cronq. | EUGR8 |
| Euphorbia exserta | Euphorbia gracilis Boiss. | EUGR9 |
| Euphorbia exserta | Tithymalopsis exserta Small | TIEX |
| Euphorbia exserta | Tithymalopsis gracilis (Boiss.) Small | TIGR2 |
| Euphorbia exstipulata | Euphorbia exstipulata Engelm. var. exstipulata Engelm. [superfluous autonym] | EUEXE3 |
| Euphorbia exstipulata | Euphorbia exstipulata Engelm. var. lata Warnock & M.C. Johnston | EUEXL |
| Euphorbia falcata | Tithymalus falcatus (L.) Klotzsch & Garcke | TIFA2 |
| Euphorbia floridana | Galarhoeus floridanus (Chapman) Small | GAFL4 |
| Euphorbia helioscopia | Galarhoeus helioscopius (L.) Haw. | GAHE8 |
| Euphorbia helioscopia | Tithymalus helioscopius (L.) Hill | TIHE3 |
| Euphorbia herniarifolia | Euphorbia hernariifolia Willd. [orthographic variant] | EUHE8 |
| Euphorbia heterophylla | Euphorbia geniculata Ortega | EUGE5 |
| Euphorbia heterophylla | Euphorbia prunifolia Jacq. | EUPR5 |
| Euphorbia heterophylla | Poinsettia geniculata (Ortega) Klotzsch & Garcke | POGE2 |
| Euphorbia heterophylla | Poinsettia heterophylla (L.) Klotzsch & Garcke | POHE11 |
| Euphorbia hexagona | Zygophyllidium hexagonum (Nutt. ex Spreng.) Small | ZYHE |
| Euphorbia inundata | Galarhoeus inundatus (Torr. ex Chapman) Small | GAIN3 |
| Euphorbia ipecacuanhae | Euphorbia arundelana Bartlett | EUAR8 |
| Euphorbia ipecacuanhae | Tithymalopsis arundelana (Bartlett) Small | TIAR2 |
| Euphorbia ipecacuanhae | Tithymalopsis ipecacuanhae (L.) Small | TIIP |
| Euphorbia lathyris | Euphorbia lathyrus L. [orthographic variant] | EULA15 |
| Euphorbia lathyris | Galarhoeus lathyris (L.) Haw. | GALA10 |
| Euphorbia lathyris | Tithymalus lathyris (L.) Hill | TILA3 |
| Euphorbia lucida | Galarhoeus lucidus (Waldst. & Kit.) Rydb. | GALU3 |
| Euphorbia lucida | Tithymalus lucidus (Waldst. & Kit.) Klotzsch & Garcke | TILU2 |
| Euphorbia macropus | Euphorbia plummerae S. Wats. [orthographic variant] | EUPL4 |
| Euphorbia macropus | Euphorbia plummeriae S. Wats. | EUPL9 |
| Euphorbia marginata | Agaloma marginata (Pursh) A.& D. L?ve | AGMA7 |
| Euphorbia marginata | Dichrophyllum marginatum (Pursh) Klotzsch & Garcke | DIMA13 |
| Euphorbia marginata | Lepadena marginata (Pursh) Nieuwl. | LEMA11 |
| Euphorbia mercurialina | Tithymalopsis mercurialina (Michx.) Small | TIME3 |
| Euphorbia myrsinites | Tithymalus myrsinites (L.) Hill | TIMY2 |
| Euphorbia oerstediana | Dichylium oerstedianum (Klotzsch & Garcke) Britt. | DIOE |
| Euphorbia peplus | Galarhoeus peplus (L.) Rydb. | GAPE3 |
| Euphorbia peplus | Tithymalus peplus (L.) Hill | TIPE2 |
| Euphorbia petiolaris | Aklema petiolaris (Sims) Millsp. | AKPE |
| Euphorbia pinetorum | Euphorbia deltoidea Engelm. ex Chapman ssp. pinetorum (Small) Oudejans | EUDEP |
| Euphorbia pinetorum | Poinsettia pinetorum Small | POPI6 |
| Euphorbia platyphyllos | Galarhoeus platyphyllos (L.) Small | GAPL |
| Euphorbia platyphyllos | Tithymalus platyphyllos (L.) Hill | TIPL3 |
| Euphorbia polyphylla | Tithymalopsis polyphylla (Engelm. ex Holz.) Small | TIPO3 |
| Euphorbia pubentissima | Euphorbia apocynifolia Small | EUAP2 |
| Euphorbia pubentissima | Euphorbia corollata L. var. mollis Millsp. | EUCOM |
| Euphorbia pubentissima | Euphorbia corollata L. var. paniculata Boiss. | EUCOP |
| Euphorbia pubentissima | Euphorbia corollata L. var. zinniiflora (Small) Ahles | EUCOZ |
| Euphorbia pubentissima | Euphorbia paniculata Ell., non Desf. | EUPA8 |
| Euphorbia pubentissima | Euphorbia zinniiflora Small | EUZI |
| Euphorbia pubentissima | Tithymalopsis apocynifolia (Small) Small | TIAP |
| Euphorbia pubentissima | Tithymalopsis paniculata (Boiss.) Small | TIPA4 |
| Euphorbia pubentissima | Tithymalopsis zinniiflora (Small) Small | TIZI |
| Euphorbia pulcherrima | Poinsettia pulcherrima (Willd. ex Klotzsch) Graham | POPU10 |
| Euphorbia purpurea | Euphorbia darlingtonii Gray | EUDA2 |
| Euphorbia purpurea | Galarhoeus darlingtonii (Gray) Small | GADA |
| Euphorbia purpurea | Tithymalus darlingtonii (Gray) Small | TIDA |
| Euphorbia radians | Poinsettia radians (Benth.) Klotzsch & Garcke | PORA11 |
| Euphorbia schizoloba | Euphorbia incisa Engelm. | EUIN2 |
| Euphorbia schizoloba | Euphorbia incisa Engelm. var. incisa Engelm. [superfluous autonym] | EUINI |
| Euphorbia schizoloba | Euphorbia incisa Engelm. var. mollis (J.B.S. Norton) L.C. Wheeler | EUINM |
| Euphorbia schizoloba | Tithymalus incisa (Engelm.) J.B.S. Norton | TIIN2 |
| Euphorbia schizoloba | Tithymalus incisa (Engelm.) J.B.S. Norton var. mollis J.B.S. Norton | TIINM |
| Euphorbia segetalis | Galarhoeus austrinus (Small) Small | GAAU |
| Euphorbia segetalis | Tithymalus austrinus Small | TIAU |
| Euphorbia spathulata | Euphorbia alta J.B.S. Norton | EUAL5 |
| Euphorbia spathulata | Euphorbia arkansana Engelm. & Gray | EUAR6 |
| Euphorbia spathulata | Euphorbia dictyosperma Fisch. & C.A. Mey. | EUDI6 |
| Euphorbia spathulata | Euphorbia obtusata Pursh | EUOB3 |
| Euphorbia spathulata | Galarhoeus arkansanus (Engelm. & Gray) Small ex Rydb. | GAAR8 |
| Euphorbia spathulata | Galarhoeus obtusatus (Pursh) Small | GAOB2 |
| Euphorbia spathulata | Tithymalus arkansanus (Engelm. & Gray) Klotzsch & Garcke | TIAR3 |
| Euphorbia spathulata | Tithymalus missouriensis (J.B.S. Norton) Small | TIMI2 |
| Euphorbia spathulata | Tithymalus obtusatus (Pursh) Klotzsch & Garcke | TIOB2 |
| Euphorbia spathulata | Tithymalus spathulatus (Lam.) W.A. Weber | TISP |
| Euphorbia strictior | Tithymalopsis strictior (Holz.) Woot. & Standl. | TIST |
| Euphorbia telephioides | Galarhoeus telephioides (Chapman) Small | GATE7 |
| Euphorbia tetrapora | Tithymalus tetraporus (Engelm.) Small | TITE5 |
| Euphorbia texana | Tithymalus texanus Millsp. ex Heller | TITE4 |
| Euphorbia trichotoma | Galarhoeus trichotomus (Kunth) Small | GATR9 |
| Everglade Key sandmat | Chamaesyce conferta Small | CHCO10 |
| eyebane | Chamaesyce nutans (Lag.) Small | CHNU9 |
| false croton | Caperonia St.-Hil. | CAPER |
| false flowering spurge | Euphorbia pubentissima Michx. | EUPU7 |
| false tungoiltree | Garcia nutans Vahl [excluded] | GANU5 |
| Fendler's sandmat | Chamaesyce fendleri (Torr. & Gray) Small | CHFE3 |
| field copperleaf | Acalypha aristata Kunth | ACAR17 |
| fineleaf noseburn | Tragia leptophylla (Torr.) I.M. Johnston | TRLE9 |
| finger rot | Cnidoscolus urens (L.) Arthur var. stimulosus (Michx.) Govaerts | CNURS |
| fire on the mountain | Euphorbia cyathophora Murr. | EUCY |
| firebush | Croton lucidus L. | CRLU2 |
| fireman | Tragia volubilis L. | TRVO |
| Fishlock's croton | Croton fishlockii Britt. | CRFI3 |
| fivepetal leaf-flower | Phyllanthus pentaphyllus C. Wright ex Griseb. | PHPE7 |
| fivepetal leaf-flower | Phyllanthus pentaphyllus C. Wright ex Griseb. ssp. pentaphyllus | PHPEP2 |
| fivepetal leaf-flower | Phyllanthus pentaphyllus C. Wright ex Griseb. ssp. pentaphyllus var. floridanus G.L. Webster | PHPEF2 |
| fivepetal leaf-flower | Phyllanthus pentaphyllus C. Wright ex Griseb. ssp. polycladus (Urban) G.L. Webster | PHPEP |
| flatseed sandmat | Chamaesyce platysperma (Engelm. ex S. Wats.) Shinners | CHPL3 |
| Florida hammock sandmat | Chamaesyce ophthalmica (Pers.) Burch | CHOP2 |
| Florida Keys noseburn | Tragia saxicola Small | TRSA2 |
| Florida leaf-flower | Phyllanthus liebmannianus Muell.-Arg. | PHLI13 |
| Florida leaf-flower | Phyllanthus liebmannianus Muell.-Arg. ssp. platylepis (Small) G.L. Webster | PHLIP2 |
| Florida pineland spurge | Euphorbia inundata Torr. ex Chapman | EUIN5 |
| flowering spurge | Euphorbia corollata L. | EUCO10 |
| Flueggea acidoton | Conami portoricensis (Kuntze) Britt. | COPO4 |
| Flueggea acidoton | Flueggea virosa auct. non (Roxb. ex Willd.) Baill. [misapplied] | FLVI |
| Flueggea acidoton | Securinega acidoton (L.) Fawcett & Rendle | SEAC3 |
| Flueggea neowawraea | Drypetes phyllanthoides (Rock) Sherff | DRPH |
| Flueggea neowawraea | Neowawraea phyllanthoides Rock | NEPH2 |
| Flueggea tinctoria | Rhamnus tinctoria L. | RHTI2 |
| Flueggea virosa | Phyllanthus virosus Roxb. ex Willd. | PHVI21 |
| foliage flower | Phyllanthus angustifolius (Sw.) Sw. | PHAN9 |
| forest sandmat | Chamaesyce clusiifolia (Hook. & Arn.) Arthur | CHCL3 |
| forked spurge | Euphorbia bifurcata Engelm. | EUBI3 |
| foxtail copperleaf | Acalypha alopecuroidea Jacq. | ACAL2 |
| gale of the wind | Phyllanthus niruri L. | PHNI2 |
| gale of the wind | Phyllanthus niruri L. ssp. lathyroides (Kunth) G.L. Webster | PHNIL |
| gale of the wind | Phyllanthus niruri L. ssp. niruri | PHNIN2 |
| gamo de costa | Phyllanthus juglandifolius Willd. | PHJU2 |
| Garber's sandmat | Chamaesyce garberi (Engelm. ex Chapman) Small | CHGA3 |
| Garcia nutans | Garcia mayana Britt. [excluded] | GAMA12 |
| garden croton | Codiaeum variegatum (L.) Blume | COVA3 |
| Geraldton carnation weed | Euphorbia terracina L. | EUTE10 |
| Geyer's sandmat | Chamaesyce geyeri (Engelm. & Gray) Small | CHGE2 |
| Geyer's sandmat | Chamaesyce geyeri (Engelm. & Gray) Small var. geyeri | CHGEG |
| Geyer's sandmat | Chamaesyce geyeri (Engelm. & Gray) Small var. wheeleriana (Warnock & M.C. Johnston) Mayfield | CHGEW |
| giradol | Chrozophora tinctoria (L.) Raf. | CHTI2 |
| glandular silverbush | Argythamnia adenophora Gray | ARAD2 |
| Glochidion puberum | Agyneia pubera L. | AGPU10 |
| goutystalk nettlespurge | Jatropha podagrica Hook. | JAPO |
| graceful sandmat | Chamaesyce hypericifolia (L.) Millsp. | CHHY2 |
| Graham's manihot | Manihot grahamii Hook. | MAGR8 |
| grainfield spurge | Euphorbia segetalis L. | EUSE8 |
| grannybush | Croton cascarilla (L.) L. | CRCA29 |
| grassland croton | Croton dioicus Cav. | CRDI6 |
| grassleaf spurge | Euphorbia graminea Jacq. | EUGR6 |
| Greater Florida spurge | Euphorbia floridana Chapman | EUFL4 |
| Guayama Copperleaf | Acalypha berteriana Muell.-Arg. | ACBE2 |
| guiana plum | Drypetes lateriflora (Sw.) Krug & Urban | DRLA3 |
| gulf croton | Croton punctatus Jacq. | CRPU6 |
| gulf leaf-flower | Phyllanthus fraternus G.L. Webster | PHFR5 |
| gulf sandmat | Chamaesyce thymifolia (L.) Millsp. | CHTH4 |
| Gulf Sebastian-bush | Ditrysinia fruticosa (Bartr.) Govaerts & Frodin | DIFR6 |
| gumtree | Sapium glandulosum (L.) Morong | SAGL5 |
| gymnanthes | Gymnanthes Sw. | GYMNA |
| Gymnanthes lucida | Ateramnus lucidus (Sw.) Rothm. | ATLU |
| ha'a | Antidesma platyphyllum Mann | ANPL2 |
| ha'a | Antidesma platyphyllum Mann var. platyphyllum | ANPLP |
| hairy sandmat | Chamaesyce villifera (Scheele) Small | CHVI17 |
| hairy-fruit spurge | Euphorbia cuphosperma (Engelm.) Boiss. | EUCU9 |
| Hall's shrubby-spurge | Tetracoccus hallii Brandeg. | TEHA |
| hame | Antidesma pulvinatum Hbd. | ANPU2 |
| hato tejas | Microstachys corniculata (Vahl) Griseb. | MICO20 |
| head sandmat | Chamaesyce capitellata (Engelm.) Millsp. | CHCA29 |
| healing croton | Croton argyranthemus Michx. | CRAR2 |
| heartleaf noseburn | Tragia cordata Michx. | TRCO |
| heartleaf sandmat | Chamaesyce cordifolia (Ell.) Small | CHCO11 |
| heather leaf-flower | Phyllanthus ericoides Torr. | PHER2 |
| Heller's spurge | Euphorbia helleri Millsp. | EUHE3 |
| herbert river cherry | Antidesma dallachyanum Baillon | ANDA2 |
| Herbst's sandmat | Chamaesyce herbstii W.L. Wagner | CHHE3 |
| herniaria-leaf spurge | Euphorbia herniarifolia Willd. | EUHE13 |
| hevea | Hevea Aublet | HEVEA |
| Hevea brasiliensis | Siphonia brasiliensis Willd. ex Adr. Juss. | SIBR7 |
| Hill Country silverbush | Argythamnia aphoroides Muell.-Arg. | ARAP |
| Hillebrand's ha'a | Antidesma platyphyllum Mann var. hillebrandii Pax & K. Hoffmann | ANPLH2 |
| hinchahuevos | Sapium laurifolium (A. Rich.) Griseb. | SALA25 |
| hippomane | Hippomane L. | HIPPO |
| hoary sandmat | Chamaesyce lata (Engelm.) Small | CHLA10 |
| hogwort | Croton capitatus Michx. | CRCA6 |
| hogwort | Croton capitatus Michx. var. capitatus | CRCAC2 |
| hollybush | Tetracoccus ilicifolius Coville & Gilman | TEIL |
| Hoover's sandmat | Chamaesyce hooveri (L.C. Wheeler) Koutnik | CHHO3 |
| horned spurge | Euphorbia brachycera Engelm. | EUBR |
| Huachuca Mountain spurge | Euphorbia macropus (Klotzsch & Garcke) Boiss. | EUMA10 |
| hyeronima | Hyeronima Allemao | HYERO |
| hyssopleaf sandmat | Chamaesyce hyssopifolia (L.) Small | CHHY3 |
| Indian spurgetree | Euphorbia neriifolia L. | EUNE4 |
| Indian walnut | Aleurites moluccana (L.) Willd. | ALMO2 |
| Indiantree spurge | Euphorbia tirucalli L. | EUTI |
| ixbut | Euphorbia lancifolia Schldl. | EULA14 |
| jaboncillo | Ditta myricoides Griseb. | DIMY |
| Jamaican gooseberry tree | Phyllanthus acuminatus Vahl | PHAC7 |
| Jatropha cardiophylla | Mozinna cardiophylla Torr. | MOCA4 |
| Jatropha cinerea | Mozinna cinerea Ortega | MOCI4 |
| Jatropha curcas | Curcas curcas (L.) Britt. & Millsp. | CUCU4 |
| Jatropha gossypiifolia var. elegans | Adenoropium elegans Pohl | ADEL |
| Jatropha gossypiifolia var. gossypiifolia | Adenoropium gossypiifolium (L.) Pohl | ADGO |
| Jatropha hernandiifolia var. hernandiifolia | Curcas hernandiifolia (Vent.) Britt. | CUHE |
| Jatropha integerrima var. hastata | Adenoropium hastatum (Jacq.) Britt. & P. Wilson | ADHA2 |
| Jatropha multifida | Adenoropium multifidum (L.) Pohl | ADMU |
| Javanese bishopwood | Bischofia javanica Blume | BIJA |
| jiqi | Pera bumeliifolia Griseb. | PEBU2 |
| jointed sandmat | Chamaesyce articulata (Brum.) Britt. | CHAR8 |
| kamala tree | Mallotus philippensis (Lam.) Muell.-Arg. | MAPH4 |
| Kauai sandmat | Chamaesyce halemanui (Sherff) Croizat & Deg. | CHHA2 |
| Kauai spurge | Euphorbia haeleeleana Herbst | EUHA2 |
| koko | Chamaesyce atrococca (Heller) Croizat & Deg. | CHAT2 |
| kokomalei | Chamaesyce kuwaleana (O. Deg. & Sherff) O.& I. Deg. | CHKU |
| Koolau Range sandmat | Chamaesyce rockii (Forbes) Croizat & Deg. | CHRO2 |
| Laredo sandmat | Chamaesyce laredana (Millsp.) Small | CHLA8 |
| large fever berry | Croton megalobotrys M?ll.Arg. | CRME15 |
| leafflower | Phyllanthus L. | PHYLL |
| leafy spurge | Euphorbia esula L. | EUES |
| leafy spurge | Euphorbia esula L. var. esula | EUESE |
| leatherstem | Jatropha dioica Cerv. | JADI |
| leatherstem | Jatropha dioica Cerv. var. dioica | JADID |
| leatherstem | Jatropha dioica Cerv. var. graminea McVaugh | JADIG |
| leatherweed | Croton pottsii (Klotzsch) Muell.-Arg. | CRPO5 |
| leatherweed | Croton pottsii (Klotzsch) Muell.-Arg. var. pottsii | CRPOP |
| leatherweed | Croton pottsii (Klotzsch) Muell.-Arg. var. thermophilus (M.C. Johnston) M.C. Johnston | CRPOT |
| lechecillo | Croton discolor Willd. | CRDI8 |
| Leptopus phyllanthoides | Andrachne arida (Warnock & M.C. Johnston) G.L. Webster | ANAR8 |
| Leptopus phyllanthoides | Andrachne phyllanthoides (Nutt.) Coult. | ANPH |
| Leptopus phyllanthoides | Savia arida Warnock & M.C. Johnston | SAAR23 |
| Leptopus phyllanthoides | Savia phyllanthoides (Nutt.) Pax & K. Hoffmann | SAPH5 |
| Lesser Florida spurge | Euphorbia polyphylla Engelm. ex Holz. | EUPO5 |
| limestone sandmat | Chamaesyce blodgettii (Engelm. ex A.S. Hitchc.) Small | CHBL2 |
| Lindheimer's croton | Croton glandulosus L. var. lindheimeri Muell.-Arg. | CRGLL |
| Lindheimer's hogwort | Croton capitatus Michx. var. lindheimeri (Engelm. & Gray) Muell.-Arg. | CRCAL2 |
| lobed croton | Croton lobatus L. | CRLO5 |
| low silverbush | Argythamnia humilis (Engelm. & Gray) Muell.-Arg. | ARHU5 |
| low silverbush | Argythamnia humilis (Engelm. & Gray) Muell.-Arg. var. humilis | ARHUH |
| low silverbush | Argythamnia humilis (Engelm. & Gray) Muell.-Arg. var. laevis (Torr.) Shinners | ARHUL |
| low silverbush | Argythamnia humilis (Engelm. & Gray) Muell.-Arg. var. leiosperma Waterfall | ARHUL2 |
| low spurge | Euphorbia peplidion Engelm. | EUPE5 |
| macaranga | Macaranga Thouars | MACAR |
| madwoman's milk | Euphorbia helioscopia L. | EUHE2 |
| maidenbush | Leptopus Dcne. | LEPTO20 |
| mala mujer | Cnidoscolus angustidens Torr. | CNAN |
| mallotus | Mallotus Lour. | MALLO |
| manchineel | Hippomane mancinella L. | HIMA2 |
| manchineel berry | Euphorbia petiolaris Sims | EUPE8 |
| manicoba | Manihot caerulescens Pohl | MACA21 |
| manicoba brava | Manihot catingae Ule | MACA20 |
| manicoba rubber | Manihot dichotoma Ule | MADI12 |
| manihot | Manihot tristis Muell. Arg. | MATR5 |
| manihot | Manihot tristis Muell. Arg. ssp. saxicola (Lanj.) Rogers & Appan | MATRS |
| Manihot angustiloba | Janipha manihot (L.) Kunth var. angustiloba Torr. | JAMAA |
| Manihot caerulescens | Manihot piauhyensis Ule | MAPI6 |
| Manihot esculenta | Janipha manihot (L.) Kunth | JAMA3 |
| Manihot esculenta | Jatropha manihot L. | JAMA4 |
| Manihot esculenta | Manihot aipi Pohl | MAAI |
| Manihot esculenta | Manihot dulcis (J. F. Gmelin) Pax | MADU3 |
| Manihot esculenta | Manihot manihot (L.) Cockerell | MAMA18 |
| Manihot esculenta | Manihot melanobasis Muell. Arg. | MAME9 |
| Manihot esculenta | Manihot utilissima Pohl | MAUT |
| Manihot tristis ssp. saxicola | Manihot saxicola Lanj. | MASA7 |
| manketti | Ricinodendron rautanenii Schinz | RIRA3 |
| Marble Canyon spurge | Euphorbia aaron-rossii A.& N. Holmgren | EUAA |
| margaritaria | Margaritaria L. f. | MARGA2 |
| Margaritaria nobilis | Phyllanthus nobilis (L. f.) Muell.-Arg. | PHNO5 |
| Mascarene Island leaf-flower | Phyllanthus tenellus Roxb. | PHTE5 |
| matted sandmat | Chamaesyce serpens (Kunth) Small | CHSE4 |
| mehamehame | Flueggea neowawraea W.J. Hayden | FLNE |
| Mendez's sandmat | Chamaesyce mendezii (Boiss.) Millsp. | CHME6 |
| menteng | Baccaurea racemosa (Reinw.) Muell. Arg. | BARA3 |
| mercurialis | Mercurialis L. | MERCU |
| mercury spurge | Euphorbia mercurialina Michx. | EUME4 |
| Mexican copperleaf | Acalypha mexicana Muell.-Arg. | ACME7 |
| Mexican croton | Croton ciliatoglandulifer Ortega | CRCI |
| Mexican fireplant | Euphorbia heterophylla L. | EUHE4 |
| Mexican sandmat | Chamaesyce gracillima (S. Wats.) Millsp. | CHGR17 |
| Mexican shrubby spurge | Euphorbia cotinifolia L. | EUCO24 |
| Mexican silverbush | Argythamnia astroplethos Ingram | ARAS4 |
| Michaux's croton | Croton michauxii G.L. Webster | CRMI8 |
| micrandra | Micrandra Benth. | MICRA3 |
| micrandra | Micrandra minor Benth. | MIMI20 |
| Microstachys corniculata | Sebastiania corniculata (Vahl) Muell.-Arg. | SECO7 |
| milkbark | Drypetes diversifolia Krug & Urban | DRDI |
| milktree | Sapium Jacq. | SAPIU |
| milktree | Sapium laurocerasus Desf. | SALA8 |
| mimicking sandmat | Chamaesyce simulans (L.C. Wheeler) Mayfield | CHSI5 |
| Missouri maidenbush | Leptopus phyllanthoides (Nutt.) G.L. Webster | LEPH11 |
| Mojave spurge | Euphorbia schizoloba Engelm. | EUSC6 |
| Mojave toothleaf | Stillingia paucidentata S. Wats. | STPA5 |
| moleplant | Euphorbia lathyris L. | EULA4 |
| Mona Island sandmat | Chamaesyce orbifolia Alain | CHOR6 |
| money croton | Croton nummulariifolius A. Rich. | CRNU3 |
| mottled spurge | Euphorbia lactea Haw. | EULA8 |
| mountain spurge | Euphorbia chamaesula Boiss. | EUCH2 |
| mouse's eye | Bernardia myricifolia (Scheele) S. Wats. | BEMY |
| mu oil tree | Vernicia montana Lour. | VEMO3 |
| myrtle spurge | Euphorbia myrsinites L. | EUMY2 |
| myrtlecroton | Bernardia P. Mill. | BERNA |
| Na Pali sandmat | Chamaesyce eleanoriae D.H. Lorence & W.L. Wagner | CHEL7 |
| narrowleaf silverbush | Argythamnia lanceolata (Benth.) Muell.-Arg. | ARLA12 |
| needlebush | Glochidion puberum (L.) Hutch. | GLPU6 |
| nettleleaf noseburn | Tragia urticifolia Michx. | TRUR2 |
| nettlespurge | Jatropha L. | JATRO |
| New Mexico copperleaf | Acalypha neomexicana Muell.-Arg. | ACNE |
| New Mexico silverbush | Argythamnia neomexicana Muell.-Arg. | ARNE2 |
| niruri | Phyllanthus debilis Klein ex Willd. | PHDE4 |
| noseburn | Tragia L. | TRAGI |
| Oahu sandmat | Chamaesyce deppeana (Boiss.) Millsp. | CHDE8 |
| oysterwood | Gymnanthes lucida Sw. | GYLU |
| palo de gallina | Alchorneopsis floribunda (Benth.) Muell.-Arg. | ALFL3 |
| pamakani mahu | Phyllanthus distichus Hook. & Arn. | PHDI8 |
| panhandle spurge | Euphorbia strictior Holz. | EUST5 |
| parasol leaf tree | Macaranga tanarius (L.) Muell.-Arg. | MATA3 |
| Paria spurge | Euphorbia nephradenia Barneby | EUNE2 |
| Parish's sandmat | Chamaesyce parishii (Greene) Millsp. ex Parish | CHPA30 |
| Parks's croton | Croton parksii Croizat | CRPA5 |
| Parry's sandmat | Chamaesyce parryi (Engelm.) Rydb. | CHPA28 |
| pascuita | Euphorbia leucocephala Lotsy | EULE6 |
| pedilanthus | Pedilanthus Neck. ex Poit. | PEDIL |
| Pedilanthus tithymaloides ssp. angustifolius | Pedilanthus angustifolius Poit. | PEAN13 |
| Pedilanthus tithymaloides ssp. angustifolius | Pedilanthus tithymaloides (L.) Poit. var. angustifolius (Poit.) Griseb. | PETIA2 |
| Pedilanthus tithymaloides ssp. padifolius | Pedilanthus padifolius (L.) Poit. | PEPA36 |
| Pedilanthus tithymaloides ssp. parasiticus | Pedilanthus latifolius Millsp. & Britt. | PELA20 |
| Pedilanthus tithymaloides ssp. smallii | Pedilanthus smallii Millsp. | PESM2 |
| Pedilanthus tithymaloides ssp. smallii | Tithymalus smallii (Millsp.) Small | TISM2 |
| pengua | Macaranga mappa (L.) Muell.-Arg. | MAMA28 |
| pepperbush | Croton humilis L. | CRHU |
| pera | Pera Mutis | PERA7 |
| peregrina | Jatropha integerrima Jacq. | JAIN |
| peregrina | Jatropha integerrima Jacq. var. hastata (Jacq.) Fosberg | JAINH |
| peregrina | Jatropha integerrima Jacq. var. integerrima | JAINI |
| perennial sandmat | Chamaesyce perennans Shinners | CHPE10 |
| petty spurge | Euphorbia peplus L. | EUPE6 |
| Philippine tung | Reutealis trisperma (Blanco) Airy Shaw | RETR |
| Phyllanthus abnormis var. abnormis | Phyllanthus drummondii Small | PHDR2 |
| Phyllanthus abnormis var. abnormis | Phyllanthus garberi Small | PHGA2 |
| Phyllanthus acidus | Cicca acidua (L.) Merr. | CIAC2 |
| Phyllanthus acidus | Cicca disticha L. | CIDI3 |
| Phyllanthus acidus | Phyllanthus distichus (L.) Muell.-Arg. | PHDI10 |
| Phyllanthus caroliniensis ssp. saxicola | Phyllanthus pruinosus auct. non Poepp. ex L.C. Rich. [misapplied] | PHPR6 |
| Phyllanthus caroliniensis ssp. saxicola | Phyllanthus saxicola Small | PHSA5 |
| Phyllanthus distichus | Phyllanthus sandwicensis Muell.-Arg. | PHSA6 |
| Phyllanthus distichus | Phyllanthus sandwicensis Muell.-Arg. var. degeneri Sherff | PHSAD2 |
| Phyllanthus distichus | Phyllanthus sandwicensis Muell.-Arg. var. ellipticus Muell.-Arg. | PHSAE |
| Phyllanthus emblica | Emblica officinalis Gaertner | EMOF |
| Phyllanthus epiphyllanthus | Xylophylla epiphyllantha (L.) Britt. | XYEP |
| Phyllanthus juglandifolius | Asterandra grandifolia (L.) Britt. | ASGR13 |
| Phyllanthus liebmannianus ssp. platylepis | Phyllanthus platylepis Small | PHPL2 |
| Phyllanthus niruri ssp. lathyroides | Phyllanthus lathyroides Kunth | PHLA11 |
| Phyllanthus orbicularis | Andrachne cuneifolia Britt. | ANCU |
| Phyllanthus orbicularis | Phyllanthus cuneifolius (Britt.) Croizat | PHCU4 |
| Phyllanthus pentaphyllus ssp. polycladus | Phyllanthus polycladus Urban | PHPO6 |
| Phyllanthus stipulatus | Phyllanthus diffusus Klotzsch | PHDI11 |
| physicnut | Jatropha cuneata Wiggins & Rollins | JACU |
| pillpod sandmat | Chamaesyce hirta (L.) Millsp. | CHHI3 |
| pineland spurge | Euphorbia pinetorum (Small) G.L. Webster | EUPI5 |
| pineland threeseed mercury | Acalypha ostryifolia Riddell | ACOS |
| plateau silverbush | Argythamnia simulans Ingram | ARSI2 |
| po'ola | Claoxylon sandwicense Muell.-Arg. | CLSA |
| poinsettia | Euphorbia pulcherrima Willd. ex Klotzsch | EUPU9 |
| pointed sandmat | Chamaesyce acuta Millsp. | CHAC2 |
| Poiret's copperleaf | Acalypha poiretii Spreng. | ACPO |
| Porter's sandmat | Chamaesyce porteriana Small | CHPO7 |
| Porter's sandmat | Chamaesyce porteriana Small var. porteriana | CHPOP3 |
| Porter's sandmat | Chamaesyce porteriana Small var. scoparia (Small) Burch | CHPOS |
| prairie sandmat | Chamaesyce missurica (Raf.) Shinners | CHMI8 |
| prairie tea | Croton monanthogynus Michx. | CRMO6 |
| prostrate sandmat | Chamaesyce prostrata (Ait.) Small | CHPR6 |
| Puerto Rico copperleaf | Acalypha portoricensis Muell.-Arg. | ACPO4 |
| Puerto Rico croton | Croton impressus Urban | CRIM3 |
| Puerto Rico palo de gallina | Alchorneopsis portoricensis Urban | ALPO |
| purging croton | Croton tiglium L. | CRTI3 |
| queen's-delight | Stillingia sylvatica L. | STSY |
| queen's-delight | Stillingia sylvatica L. ssp. sylvatica | STSYS2 |
| queen's-delight | Stillingia sylvatica L. ssp. tenuis (Small) D.J. Rogers | STSYT |
| queen's-root | Stillingia linearifolia S. Wats. | STLI3 |
| ragged nettlespurge | Jatropha macrorhiza Benth. | JAMA |
| ragged nettlespurge | Jatropha macrorhiza Benth. var. macrorhiza Benth. [excluded] | JAMAM2 |
| ragged nettlespurge | Jatropha macrorhiza Benth. var. septemfida Engelm. | JAMAS |
| rambai | Baccaurea motleyana (Muell. Arg.) Muell. Arg. | BAMO4 |
| Rattan's sandmat | Chamaesyce ocellata (Dur. & Hilg.) Millsp. ssp. rattanii (S. Wats.) Koutnik | CHOCR |
| red shrubby-spurge | Tetracoccus dioicus Parry | TEDI |
| red-gland spurge | Chamaesyce melanadenia (Torr.) Millsp. | CHME5 |
| red-hot cat's tail | Acalypha hispida Burm. f. | ACHI2 |
| redbird flower | Pedilanthus tithymaloides (L.) Poit. | PETI |
| redbird flower | Pedilanthus tithymaloides (L.) Poit. ssp. angustifolius (Poit.) Dressler | PETIA |
| redbird flower | Pedilanthus tithymaloides (L.) Poit. ssp. padifolius (L.) Dressler | PETIP |
| redbird flower | Pedilanthus tithymaloides (L.) Poit. ssp. parasiticus (Klotzsch & Garcke) Dressler | PETIP2 |
| redbird flower | Pedilanthus tithymaloides (L.) Poit. ssp. tithymaloides | PETIT2 |
| Remy's sandmat | Chamaesyce remyi (Gray ex Boiss.) Croizat & Deg. | CHRE3 |
| Remy's sandmat | Chamaesyce remyi (Gray ex Boiss.) Croizat & Deg. var. hanaleiensis (Sherff) O.& I. Deg. | CHREH |
| Remy's sandmat | Chamaesyce remyi (Gray ex Boiss.) Croizat & Deg. var. kauaiensis (O. Deg. & Sherff) O.& I. Deg. | CHREK |
| Remy's sandmat | Chamaesyce remyi (Gray ex Boiss.) Croizat & Deg. var. remyi | CHRER |
| resin spurge | Euphorbia resinifera Berg | EURE12 |
| reutealis | Reutealis Airy Shaw | REUTE |
| Reutealis trisperma | Aleurites trisperma Blanco | ALTR11 |
| reverchonia | Reverchonia Gray | REVER |
| ribseed sandmat | Chamaesyce glyptosperma (Engelm.) Small | CHGL13 |
| ricinodendron | Ricinodendron Muell. Arg. | RICIN2 |
| ricinus | Ricinus L. | RICIN |
| Rio Grande leaf-flower | Phyllanthus abnormis Baill. var. riograndensis G.L. Webster | PHABR |
| roadside croton | Croton trinitatis Millsp. | CRTR8 |
| roadside sandmat | Chamaesyce lasiocarpa (Klotzsch) Arthur | CHLA9 |
| Roemer's spurge | Euphorbia roemeriana Scheele | EURO7 |
| rosewood | Drypetes ilicifolia (DC.) Krug & Urban | DRIL |
| round copperleaf | Acalypha monostachya Cav. | ACMO |
| royal sandmat | Chamaesyce dioica (Kunth) Millsp. | CHDI5 |
| rubber tree | Hevea brasiliensis (Willd. ex Adr. Juss.) Muell. Arg. | HEBR8 |
| Russian leafy spurge | Euphorbia esula L. var. uralensis (Fisch. ex Link) Dorn | EUESU |
| sabinon | Croton poecilanthus Urban | CRPO4 |
| sacatrapo | Caperonia palustris (L.) St.-Hil. | CAPA11 |
| San Pedro River sandmat | Chamaesyce trachysperma (Engelm.) Millsp. | CHTR3 |
| sand reverchonia | Reverchonia arenaria Gray | REAR |
| sandbox tree | Hura crepitans L. | HUCR |
| sandbox tree | Hura L. | HURA |
| sanddune sandmat | Chamaesyce carunculata (Waterfall) Shinners | CHCA30 |
| sanddune spurge | Euphorbia trichotoma Kunth | EUTR3 |
| sandmat | Chamaesyce S.F. Gray | CHAMA15 |
| sangre de cristo | Jatropha cardiophylla (Torr.) Muell.-Arg. | JACA2 |
| Sapium glandulosum | Sapium caribaeum Urban | SACA25 |
| Sapium laurifolium | Sapium aucuparium auct. non Jacq. [misapplied] | SAAU4 |
| Sapium laurifolium | Sapium jamaicense Sw. nom. illeg. | SAJA3 |
| sauropus | Sauropus Blume | SAURO |
| savia | Savia Willd. | SAVIA |
| sawtooth sandmat | Chamaesyce serrula (Engelm.) Woot. & Standl. | CHSE7 |
| scarlet-plume | Euphorbia fulgens Karw. Ex Klotzsch | EUFU4 |
| scented croton | Croton suaveolens Torr. | CRSU7 |
| sea spurge | Euphorbia paralias L. | EUPA13 |
| seaside sandmat | Chamaesyce polygonifolia (L.) Small | CHPO6 |
| Sebastian-bush | Sebastiania Spreng. | SEBAS2 |
| Sebastiania bilocularis | Sapium biloculare (S. Wats.) Pax | SABI4 |
| serrate spurge | Euphorbia serrata L. | EUSE12 |
| sharpleaf silverbush | Argythamnia candicans Sw. | ARCA20 |
| shining spurge | Euphorbia lucida Waldst. & Kit. | EULU2 |
| shortspike noseburn | Tragia brevispica Engelm. & Gray | TRBR4 |
| shrubby copperleaf | Acalypha phleoides Cav. | ACPH3 |
| shrubby-spurge | Tetracoccus Engelm. ex Parry | TETRA2 |
| sickle spurge | Euphorbia falcata L. | EUFA2 |
| silky silverbush | Argythamnia argyraea Cory | ARAR5 |
| silver July croton | Croton argenteus L. | CRAR5 |
| silverbush | Argythamnia P. Br. | ARGYT |
| simpleleaf bushweed | Flueggea acidoton (L.) G.L. Webster | FLAC |
| Simpson's croton | Croton glandulosus L. var. simpsonii Ferguson | CRGLS2 |
| sixangle spurge | Euphorbia hexagona Nutt. ex Spreng. | EUHE5 |
| slender threeseed mercury | Acalypha gracilens Gray | ACGR2 |
| slender threeseed mercury | Acalypha monococca (Engelm. ex Gray) L. Mill. & Gandhi | ACMO4 |
| slimseed sandmat | Chamaesyce stictospora (Engelm.) Small | CHST8 |
| Small's noseburn | Tragia smallii Shinners | TRSM |
| Small's redbird flower | Pedilanthus tithymaloides (L.) Poit. ssp. smallii (Millsp.) Dressler | PETIS |
| smallseed sandmat | Chamaesyce polycarpa (Benth.) Millsp. ex Parish | CHPO12 |
| smartweed leaf-flower | Phyllanthus polygonoides Nutt. ex Spreng. | PHPO3 |
| snow on the mountain | Euphorbia marginata Pursh | EUMA8 |
| snow on the prairie | Euphorbia bicolor Engelm. & Gray | EUBI2 |
| snowbush | Breynia disticha J.R. & G. Forst. | BRDI8 |
| Soliman's croton | Croton soliman Cham. & Schlecht. | CRSO2 |
| Sonoita noseburn | Tragia laciniata (Torr.) Muell.-Arg. | TRLA |
| Sonoran croton | Croton sonorae Torr. | CRSO |
| Sonoran sandmat | Chamaesyce micromera (Boiss. ex Engelm.) Woot. & Standl. | CHMI7 |
| Sonoran silverbush | Argythamnia brandegeei Millsp. | ARBR3 |
| Sonoran silverbush | Argythamnia brandegeei Millsp. var. intonsa (I.M. Johnston) Ingram ex L.C. Wheeler | ARBRI |
| southern Florida sandmat | Chamaesyce adenoptera (Bertol.) Small | CHAD |
| southern Florida sandmat | Chamaesyce adenoptera (Bertol.) Small ssp. pergamena (Small) Burch | CHADP |
| spiked manihot | Manihot subspicata Rogers & Appan | MASU15 |
| spotted sandmat | Chamaesyce maculata (L.) Small | CHMA15 |
| spreading sandmat | Chamaesyce humistrata (Engelm. ex Gray) Small | CHHU3 |
| spurge | Euphorbia gaudichaudii Boiss. | EUGA6 |
| spurge | Euphorbia L. | EUPHO |
| spurgecreeper | Dalechampia scandens L. | DASC5 |
| squareseed spurge | Euphorbia exstipulata Engelm. | EUEX4 |
| Stillingia sylvatica ssp. sylvatica | Stillingia angustifolia (Muell.-Arg.) Engelm. ex S. Wats. | STAN6 |
| Stillingia sylvatica ssp. sylvatica | Stillingia salicifolia (Torr.) Raf. | STSA5 |
| Stillingia sylvatica ssp. sylvatica | Stillingia spathulata (Muell.-Arg.) Small | STSP11 |
| Stillingia sylvatica ssp. sylvatica | Stillingia sylvatica L. var. salicifolia Torr. | STSYS |
| Stillingia sylvatica ssp. tenuis | Stillingia tenuis Small | STTE11 |
| Stillingia texana | Stillingia sylvatica L. var. linearifolia (Torr.) Muell.-Arg. | STSYL |
| stipulate leaf-flower | Phyllanthus stipulatus (Raf.) G.L. Webster | PHST5 |
| streambank copperleaf | Acalypha bisetosa Bertol. ex Spreng. | ACBI3 |
| summer spurge | Euphorbia discoidalis Chapman | EUDI5 |
| sun spurge | Euphorbia radians Benth. | EURA2 |
| swordbush | Phyllanthus epiphyllanthus L. | PHEP |
| Tahitian gooseberry tree | Phyllanthus acidus (L.) Skeels | PHAC3 |
| tall silverbush | Argythamnia mercurialina (Nutt.) Muell.-Arg. | ARME5 |
| tall silverbush | Argythamnia mercurialina (Nutt.) Muell.-Arg. var. mercurialina | ARMEM |
| tall silverbush | Argythamnia mercurialina (Nutt.) Muell.-Arg. var. pilosissima (Benth.) Shinners | ARMEP |
| tamujo | Flueggea tinctoria (L.) G. L. Webster | FLTI |
| telephus spurge | Euphorbia telephioides Chapman | EUTE6 |
| Terlingua sandmat | Chamaesyce theriaca (L.C. Wheeler) Shinners | CHTH6 |
| tetracarpidium | Tetracarpidium conophorum (Muell. Arg.) Hutch. & Dalziel | TECO9 |
| tetracarpidium | Tetracarpidium Pax | TETRA13 |
| Tetracoccus hallii | Halliophytum fasciculatum (S. Wats.) I.M. Johnston var. hallii (Brandeg.) McMinn | HAFAH |
| Tetracoccus hallii | Halliophytum fasciculatum auct. non (S. Wats.) I.M. Johnston [misapplied] | HAFA |
| Tetracoccus hallii | Halliophytum hallii (Brandeg.) I.M. Johnston | HAHA6 |
| Tetracoccus hallii | Tetracoccus fasciculatus (S. Wats.) Croizat var. hallii (Brandeg.) Dressler | TEFAH |
| Tetracoccus hallii | Tetracoccus fasciculatus auct. non (S. Wats.) Croizat [misapplied] | TEFA |
| Texas bullnettle | Cnidoscolus texanus (Muell.-Arg.) Small | CNTE |
| Texas croton | Croton texensis (Klotzsch) Muell.-Arg. | CRTE4 |
| Texas croton | Croton texensis (Klotzsch) Muell.-Arg. var. texensis | CRTET |
| Texas spurge | Euphorbia texana (Millsp. ex Heller) Boiss. | EUTE16 |
| Texas toothleaf | Stillingia texana I.M. Johnston | STTE3 |
| Tharp's croton | Croton lindheimerianus Scheele var. tharpii M.C. Johnston | CRLIT |
| threadstem sandmat | Chamaesyce revoluta (Engelm.) Small | CHRE4 |
| threeseed croton | Croton lindheimerianus Scheele | CRLI2 |
| threeseed croton | Croton lindheimerianus Scheele var. lindheimerianus | CRLIL |
| thymeleaf sandmat | Chamaesyce serpyllifolia (Pers.) Small | CHSE6 |
| thymeleaf sandmat | Chamaesyce serpyllifolia (Pers.) Small ssp. hirtella (Engelm. ex S. Wats.) Koutnik | CHSEH |
| thymeleaf sandmat | Chamaesyce serpyllifolia (Pers.) Small ssp. serpyllifolia | CHSES |
| tinted woodland spurge | Euphorbia commutata Engelm. ex Gray | EUCO8 |
| toothed spurge | Euphorbia dentata Michx. | EUDE4 |
| toothed spurge | Euphorbia dentata Michx. var. dentata | EUDED |
| toothed spurge | Euphorbia dentata Michx. var. lasiocarpa Boiss. | EUDEL |
| toothleaf | Stillingia Garden ex L. | STILL |
| Torrey's croton | Croton incanus Kunth | CRIN13 |
| Tragia betonicifolia | Tragia urticifolia Michx. var. texana Shinners | TRURT |
| Tragia cordata | Tragia macrocarpa Willd. | TRMA10 |
| Tragia leptophylla | Tragia nepetifolia Cav. var. leptophylla (Torr.) Shinners | TRNEL |
| Tragia leptophylla | Tragia ramosa Torr. var. leptophylla Torr. | TRRAL |
| Tragia ramosa | Tragia angustifolia Nutt. | TRAN8 |
| Tragia ramosa | Tragia nepetifolia Cav. var. ramosa (Torr.) Muell.-Arg. | TRNER |
| Tragia ramosa | Tragia stylaris Muell.-Arg. | TRST10 |
| Tragia urens | Tragia linearifolia Ell. | TRLI2 |
| TransPecos croton | Croton sancti-lazari Croizat | CRSA5 |
| treadsoftly | Cnidoscolus aconitifolius (P. Mill.) I.M. Johnston | CNAC |
| Trecul's toothleaf | Stillingia treculiana (Muell.-Arg.) I.M. Johnston | STTR2 |
| tree spurge | Euphorbia dendroides L. | EUDE10 |
| Triadica sebifera | Croton sebiferum L. | CRSE7 |
| Triadica sebifera | Sapium sebiferum (L.) Roxb. | SASE5 |
| tropical leaf-flower | Phyllanthus pulcher Wallich ex Muell.-Arg. | PHPU11 |
| tungoil tree | Vernicia fordii (Hemsl.) Airy-Shaw | VEFO |
| Turpin's sandmat | Chamaesyce turpinii (Boiss.) Millsp. | CHTU |
| twocolor croton | Croton leucophyllus Muell.-Arg. | CRLE3 |
| upright myrtle spurge | Euphorbia rigida Bieb. | EURI10 |
| urban spurge | Euphorbia agraria Bieb. | EUAG |
| Utah croton | Croton texensis (Klotzsch) Muell.-Arg. var. utahensis Cronq. | CRTEU |
| variable sandmat | Chamaesyce multiformis (Gaud. ex Hook. & Arn.) Croizat & Deg. | CHMU3 |
| variable sandmat | Chamaesyce multiformis (Gaud. ex Hook. & Arn.) Croizat & Deg. var. microphylla (Boiss.) O.& I. Deg. | CHMUM |
| variable sandmat | Chamaesyce multiformis (Gaud. ex Hook. & Arn.) Croizat & Deg. var. multiformis | CHMUM2 |
| varital | Drypetes glauca Vahl | DRGL2 |
| Vasey's wild lime | Adelia vaseyi (Coult.) Pax & K. Hoffmann | ADVA |
| vaupesia | Vaupesia R. E. Schultes | VAUPE |
| velvet spurge | Euphorbia innocua L.C. Wheeler | EUIN4 |
| vente conmigo | Croton glandulosus L. | CRGL2 |
| vente conmigo | Croton glandulosus L. var. angustifolius Muell.-Arg. | CRGLA |
| vente conmigo | Croton glandulosus L. var. floridanus (Ferguson) R.W. Long | CRGLF |
| vente conmigo | Croton glandulosus L. var. glandulosus | CRGLG |
| vente conmigo | Croton glandulosus L. var. pubentissimus Croizat | CRGLP |
| vente conmigo | Croton glandulosus L. var. septentrionalis Muell.-Arg. | CRGLS |
| vernicia | Vernicia Lour. | VERNI |
| Vernicia fordii | Aleurites fordii Hemsl. | ALFO |
| Vernicia montana | Aleurites cordata auct. non (Thunb.) R. Br. ex Steud. [misapplied] | ALCO12 |
| Vernicia montana | Aleurites montana (Lour.) E.H. Wilson | ALMO11 |
| Vernicia montana | Vernicia cordata auct. non (Thunb.) Airy-Shaw [misapplied] | VECO6 |
| Virginia threeseed mercury | Acalypha virginica L. | ACVI |
| wahiawa bog sandmat | Chamaesyce sparsiflora (Heller) Koutnik | CHSP4 |
| Walker's manihot | Manihot walkerae Croizat | MAWA |
| warty spurge | Euphorbia spathulata Lam. | EUSP |
| water toothleaf | Stillingia aquatica Chapman | STAQ2 |
| wavyleaf noseburn | Tragia urens L. | TRUR |
| weak spurge | Euphorbia tetrapora Engelm. | EUTE4 |
| wedge leaf-flower | Phyllanthus orbicularis Kunth | PHOR10 |
| wedge sandmat | Chamaesyce deltoidea (Engelm. ex Chapman) Small | CHDE7 |
| wedge sandmat | Chamaesyce deltoidea (Engelm. ex Chapman) Small ssp. adhaerens (Small) Herndon | CHDEA2 |
| wedge sandmat | Chamaesyce deltoidea (Engelm. ex Chapman) Small ssp. deltoidea | CHDED |
| wedge sandmat | Chamaesyce deltoidea (Engelm. ex Chapman) Small ssp. pinetorum (Small) Herndon | CHDEP |
| wedge sandmat | Chamaesyce deltoidea (Engelm. ex Chapman) Small ssp. serpyllum (Small) Burch | CHDES |
| wedgeleaf spurge | Euphorbia longicruris Scheele | EULO2 |
| West Indian croton | Croton stenophyllus Griseb. | CRST6 |
| West Indian spurge | Euphorbia oerstediana (Klotzsch & Garcke) Boiss. | EUOE2 |
| whitemargin sandmat | Chamaesyce albomarginata (Torr. & Gray) Small | CHAL11 |
| Wiggins's croton | Croton wigginsii L.C. Wheeler | CRWI2 |
| wild lime | Adelia L. | ADELI |
| wild lime | Adelia ricinella L. | ADRI |
| wild marrow | Croton astroites Dry. | CRAS3 |
| wild oilnut | Jatropha hernandiifolia Vent. | JAHE |
| wild oilnut | Jatropha hernandiifolia Vent. var. hernandiifolia | JAHEH |
| wild oilnut | Jatropha hernandiifolia Vent. var. portoricensis (Millsp.) Urban | JAHEP |
| Wilkes's acalypha | Acalypha amentacea Roxb. ssp. wilkesiana (Muell.-Arg.) Fosberg | ACAMW |
| Willdenow's croton | Croton willdenowii G.L. Webster | CRWI5 |
| woodland spurge | Euphorbia palmeri Engelm. ex S. Wats. | EUPA4 |
| woodland spurge | Euphorbia palmeri Engelm. ex S. Wats. var. palmeri | EUPAP |
| woodland spurge | Euphorbia palmeri Engelm. ex S. Wats. var. subpubens (Engelm.) L.C. Wheeler | EUPAS |
| wormseed sandmat | Chamaesyce vermiculata (Raf.) House | CHVE5 |
| Wright's spurge | Euphorbia wrightii Torr. & Gray | EUWR2 |
| yellow balsam | Croton flavens L. | CRFL23 |
| yerba | Croton ovalifolius Vahl | CROV |
| Yuma sandmat | Chamaesyce setiloba (Engelm. ex Torr.) J.B.S. Norton | CHSE8 |
| Yuma silverbush | Argythamnia serrata (Torr.) Muell.-Arg. | ARSE7 |