| Common Name | Scientific Name | Code |
| n/a | Agave ?ajoensis W.C. Hodgson [deserti Xschottii] | AGAJ |
| n/a | Agave americana L. var. marginata Trel. [excluded] | AGAMM |
| n/a | Agave americana L. var. mediopicta Trel. [excluded] | AGAMM2 |
| n/a | Agave americana L. var. striata Trel. [excluded] | AGAMS |
| n/a | Agave cupreata Trel. & Berger | AGCU3 |
| n/a | Agave rigida P. Mill. | AGRI6 |
| n/a | Agave rigida P. Mill. var. rigida | AGRIR |
| n/a | Dracaena concinna Kunth | DRCO9 |
| n/a | Furcraea macrophylla Baker [excluded] | FUMA7 |
| n/a | Hesperoyucca (Engelm.) Baker | HESPE12 |
| n/a | Sansevieria cylindrica Bojer ex Hook. [excluded] | SACY8 |
| n/a | Sansevieria fasciata Prain [excluded] | SAFA11 |
| n/a | Sansevieria longiflora Sims [excluded] | SALO16 |
| n/a | Yucca ?karlsruhensis Graebn. [filamentosa ? glauca] | YUKA3 |
| n/a | Yucca madrensis Gentry | YUMA4 |
| Adam's needle | Yucca filamentosa L. | YUFI |
| agave | Agave L. | AGAVE |
| Agave ?arizonica | Agave arizonica Gentry & J.H. Weber [hybrid] | AGAR3 |
| Agave chrysantha | Agave palmeri Engelm. var. chrysantha (Peebles) Little ex L. Benson | AGPAC2 |
| Agave deserti ssp. deserti | Agave consociata Trel. | AGCO7 |
| Agave deserti ssp. simplex | Agave deserti Engelm. var. simplex (Gentry) W.C. Hodgson & Reveal | AGDES3 |
| Agave glomeruliflora | Agave chisosensis C.H. Muller | AGCH3 |
| Agave lechuguilla | Agave lophantha Schiede var. poselgeri (Salm-Dyck) Berger | AGLOP |
| Agave missionum | Agave portoricensis Trel. | AGPO |
| Agave parryi ssp. neomexicana | Agave neomexicana Woot. & Standl. | AGNE4 |
| Agave parryi ssp. parryi | Agave huachucensis Baker | AGHU3 |
| Agave parryi ssp. parryi | Agave parryi Engelm. var. couesii (Engelm. ex Trel.) Kearney & Peebles | AGPAC |
| Agave parryi ssp. parryi | Agave parryi Engelm. var. huachucensis (Baker) Little ex L. Benson | AGPAH |
| Agave parryi ssp. parryi | Agave scabra Salm-Dyck | AGSC2 |
| Agave sisalana | Agave rigida P. Mill. var. sisalana (Perrine) Engelm. | AGRIS |
| Agave toumeyana var. bella | Agave toumeyana Trel. ex Standl. ssp. bella (Breitung) Gentry | AGTOB2 |
| Agave univittata | Agave heteracantha Zucc. | AGHE6 |
| Agave univittata | Agave lophantha Schiede | AGLO |
| Agave univittata | Agave mckelveyana Gentry, nomen nudum | AGMC |
| Agave utahensis var. kaibabensis | Agave kaibabensis McKelvey | AGKA2 |
| Agave utahensis var. kaibabensis | Agave utahensis Engelm. ssp. kaibabensis (McKelvey) Gentry | AGUTK2 |
| aloe yucca | Yucca aloifolia L. | YUAL |
| American century plant | Agave americana L. | AGAM |
| American century plant | Agave americana L. ssp. americana | AGAMA |
| American century plant | Agave americana L. ssp. americana var. americana | AGAMA2 |
| American century plant | Agave americana L. ssp. americana var. expansa (Jacobi) Gentry | AGAME |
| American century plant | Agave americana L. ssp. protamericana Gentry | AGAMP |
| Arizona century plant | Agave ?arizonica Gentry & J.Z. Weber (pro sp.) [chrysantha ? toumeyana] | AGAR8 |
| Arkansas yucca | Yucca arkansana Trel. | YUAR2 |
| banana yucca | Yucca baccata Torr. | YUBA |
| bluestem yucca | Yucca guatemalensis Baker | YUGU |
| bowstring hemp | Sansevieria senegambica Baker | SASE16 |
| Brazos River yucca | Yucca necopina Shinners | YUNE |
| Buckley's yucca | Yucca constricta Buckl. | YUCO |
| bush nightfighter | Dracaena steudneri Schweinf. ex Engl. | DRST8 |
| cantala | Agave cantala Roxb. | AGCA9 |
| century plant | Agave angustifolia Haw. | AGAN4 |
| century plant | Agave xylonacantha Salm-Dyck | AGXY |
| chaparral yucca | Hesperoyucca whipplei (Torr.) Baker | HEWH |
| Chisos Mountain century plant | Agave glomeruliflora (Engelm.) Berger | AGGL2 |
| coastal agave | Agave shawii Engelm. | AGSH |
| corita | Agave missionum Trel. | AGMI4 |
| Cuban hemp | Furcraea hexapetala (Jacq.) Urban | FUHE2 |
| curve-leaf yucca | Yucca recurvifolia Salisb. | YURE2 |
| desert agave | Agave deserti Engelm. | AGDE |
| desert agave | Agave deserti Engelm. ssp. deserti | AGDED |
| desert agave | Agave deserti Engelm. ssp. simplex Gentry | AGDES |
| Don Quixote's lace | Yucca treculeana Carr. | YUTR |
| Don Quixote's lace | Yucca treculeana Carr. var. succulenta McKelvey | YUTRS |
| Don Quixote's lace | Yucca treculeana Carr. var. treculeana | YUTRT |
| dracaena | Dracaena L. | DRACA |
| dragontree | Dracaena draco (L.) L. | DRDR3 |
| dragontree | Dracaena marginata Lam. | DRMA8 |
| dwarf century plant | Agave desmettiana Jacobi | AGDE4 |
| Eggers's century plant | Agave eggersiana Trel. | AGEG |
| Engelmann's false yucca | Hesperaloe parviflora (Torr.) Coult. var. engelmannii (Krauskopf) Trel. | HEPAE |
| Eve's needle | Yucca faxoniana (Trel.) Sarg. | YUFA |
| false aloe | Manfreda virginica (L.) Salisb. ex Rose | MAVI5 |
| false sisal | Agave decipiens Baker | AGDE3 |
| false yucca | Hesperaloe Engelm. | HESPE |
| female karata | Furcraea tuberosa (P. Mill.) Ait. f. | FUTU |
| fragrant dracaena | Dracaena fragrans (L.) Ker-Gawl. | DRFR2 |
| furcraea | Furcraea Vent. | FURCR |
| Furcraea foetida | Furcraea gigantea Vent. | FUGI |
| gold dust dracaena | Dracaena surculosa Lindl. | DRSU11 |
| goldenflower century plant | Agave chrysantha Peebles | AGCH2 |
| Grand Canyon century plant | Agave phillipsiana W.C. Hodgson | AGPH |
| Gulf Coast yucca | Yucca louisianensis Trel. | YULO |
| Gurney's yucca | Yucca glauca Nutt. var. gurneyi McKelvey | YUGLG |
| Havard's century plant | Agave havardiana Trel. | AGHA |
| henequen | Agave fourcroydes Lemaire | AGFO2 |
| Hesperoyucca newberryi | Yucca newberryi McKelvey | YUNE3 |
| Hesperoyucca whipplei | Yucca californica Lemmon | YUCA4 |
| Hesperoyucca whipplei | Yucca graminifolia Wood | YUGR |
| Hesperoyucca whipplei | Yucca nitida C. Wright ex W. Wats. | YUNI |
| Hesperoyucca whipplei | Yucca whipplei Torr. | YUWH |
| Hesperoyucca whipplei | Yucca whipplei Torr. ssp. caespitosa (M.E. Jones) Haines | YUWHC |
| Hesperoyucca whipplei | Yucca whipplei Torr. ssp. intermedia Haines | YUWHI |
| Hesperoyucca whipplei | Yucca whipplei Torr. ssp. parishii (M.E. Jones) Haines | YUWHP |
| Hesperoyucca whipplei | Yucca whipplei Torr. ssp. percursa Haines | YUWHP2 |
| Hesperoyucca whipplei | Yucca whipplei Torr. var. caespitosa M.E. Jones | YUWHC2 |
| Hesperoyucca whipplei | Yucca whipplei Torr. var. graminifolia (Wood) Trel. | YUWHG |
| Hesperoyucca whipplei | Yucca whipplei Torr. var. intermedia (Haines) J.M. Webber | YUWHI2 |
| Hesperoyucca whipplei | Yucca whipplei Torr. var. parishii M.E. Jones | YUWHP3 |
| Hesperoyucca whipplei | Yucca whipplei Torr. var. percursa (Haines) J.M. Webber | YUWHP4 |
| Hesperoyucca whipplei | Yucca whipplei Torr. var. whipplei Torr. [superfluous autonym] | YUWHW |
| iguanatail | Sansevieria hyacinthoides (L.) Druce | SAHY2 |
| Indian bowstring hemp | Sansevieria roxburghiana Schultes & Schultes f. | SARO4 |
| intermediate yucca | Yucca baileyi Woot. & Standl. var. intermedia (McKelvey) Reveal | YUBAI |
| Jaeger's Joshua tree | Yucca brevifolia Engelm. var. jaegeriana McKelvey | YUBRJ |
| Joshua tree | Yucca brevifolia Engelm. | YUBR |
| Joshua tree | Yucca brevifolia Engelm. var. brevifolia | YUBRB |
| Kaibab agave | Agave utahensis Engelm. var. kaibabensis (McKelvey) Breitung | AGUTK |
| Kanab yucca | Yucca angustissima Engelm. ex Trel. var. kanabensis (McKelvey) Reveal | YUANK |
| lechuguilla | Agave lechuguilla Torr. | AGLE |
| longflower tuberose | Manfreda longiflora (Rose) Verhoek-Williams | MALO |
| maguey | Agave atrovirens Karw. ex Salm-Dyck | AGAT |
| Manfreda longiflora | Polianthes runyonii Shinners | PORU13 |
| Manfreda longiflora | Runyonia longiflora Rose | RULO9 |
| Manfreda maculosa | Agave maculata Engelm. ex Torr., non Regel | AGMA5 |
| Manfreda maculosa | Agave maculosa Hook. | AGMA6 |
| Manfreda maculosa | Agave maculosa Hook. var. minor Jacobi | AGMAM2 |
| Manfreda maculosa | Polianthes maculosa (Hook.) Shinners | POMA25 |
| Manfreda variegata | Agave variegata Jacobi | AGVA3 |
| Manfreda variegata | Manfreda tamazunchalensis Matuda | MATA4 |
| Manfreda variegata | Manfreda xilitlensis Matuda | MAXI |
| Manfreda variegata | Polianthes variegata (Jacobi) Shinners | POVA6 |
| Manfreda virginica | Agave lata Shinners | AGLA8 |
| Manfreda virginica | Agave tigrina (Engelm.) Cory | AGTI |
| Manfreda virginica | Agave virginica L. | AGVI6 |
| Manfreda virginica | Allibertia intermedia Marion | ALIN9 |
| Manfreda virginica | Manfreda tigrina (Engelm.) Small | MATI |
| Manfreda virginica | Manfreda virginica (L.) Salisb. ex Rose var. tigrina (Engelm.) Rose | MAVIT3 |
| Manfreda virginica | Polianthes lata (Shinners) Shinners | POLA14 |
| Manfreda virginica | Polianthes virginica (L.) Shinners | POVI18 |
| Mauritius hemp | Furcraea foetida (L.) Haw. | FUFO |
| Mojave yucca | Yucca schidigera Roezl ex Ortgies | YUSC2 |
| mottled tuberose | Manfreda variegata (Jacobi) Rose | MAVA |
| moundlily yucca | Yucca gloriosa L. | YUGL2 |
| Murphey's century plant | Agave murpheyi F. Gibson | AGMU |
| narrowleaf yucca | Yucca angustissima Engelm. ex Trel. | YUAN2 |
| narrowleaf yucca | Yucca angustissima Engelm. ex Trel. var. angustissima | YUANA2 |
| Navajo yucca | Yucca baileyi Woot. & Standl. | YUBA2 |
| Navajo yucca | Yucca baileyi Woot. & Standl. var. baileyi | YUBAB3 |
| Navajo yucca | Yucca baileyi Woot. & Standl. var. navajoa (J.M. Webber) J.M. Webber | YUBAN |
| Nevada agave | Agave utahensis Engelm. var. nevadensis Engelm. ex Greenm. & Roush | AGUTN |
| New Mexico false yucca | Hesperaloe funifera (Lem.) Trel. | HEFU2 |
| New Mexico Spanish bayonet | Yucca harrimaniae Trel. var. neomexicana (Woot. & Standl.) Reveal | YUHAN |
| New Zealand flax | Phormium tenax J.R. & G. Forst. | PHTE8 |
| Newberry's yucca | Hesperoyucca newberryi (McKelvey) Clary | HENE7 |
| Palmer's century plant | Agave palmeri Engelm. | AGPA3 |
| Parry's agave | Agave parryi Engelm. | AGPA4 |
| Parry's agave | Agave parryi Engelm. ssp. neomexicana (Woot. & Standl.) Ullrich | AGPAN6 |
| Parry's agave | Agave parryi Engelm. ssp. parryi | AGPAP5 |
| phormium | Phormium J.R. & G. Forst. | PHORM |
| plains yucca | Yucca campestris McKelvey | YUCA |
| polianthes | Polianthes L. | POLIA |
| redflower false yucca | Hesperaloe parviflora (Torr.) Coult. | HEPA8 |
| redflower false yucca | Hesperaloe parviflora (Torr.) Coult. var. parviflora | HEPAP |
| rough century plant | Agave asperrima Jacobi | AGAS3 |
| San Angelo yucca | Yucca reverchonii Trel. | YURE |
| sansevieria | Sansevieria Thunb. | SANSE |
| Sansevieria hyacinthoides | Cordyline guineensis (L.) Britt. | COGU2 |
| Sansevieria hyacinthoides | Sansevieria metallica Horton ex Gerome & Labroy | SAME9 |
| Sansevieria hyacinthoides | Sansevieria thyrsiflora Thunb. | SATH |
| Schott's century plant | Agave schottii Engelm. | AGSC3 |
| Schott's century plant | Agave schottii Engelm. var. schottii | AGSCS2 |
| Schott's yucca | Yucca ?schottii Engelm. (pro sp.) [baccata ? elata] | YUSC |
| Siler's tuberose | Manfreda sileri Verhoek-Williams | MASI |
| sisal hemp | Agave sisalana Perrine | AGSI2 |
| slimfoot century plant | Agave gracilipes Trel. | AGGR4 |
| smallflower century plant | Agave parviflora Torr. | AGPA5 |
| soaptree yucca | Yucca elata (Engelm.) Engelm. | YUEL |
| soapweed yucca | Yucca glauca Nutt. | YUGL |
| soapweed yucca | Yucca glauca Nutt. var. glauca | YUGLG2 |
| Socotra dragontree | Dracaena cinnabari Balf. f. | DRCI3 |
| Spanish bayonet | Yucca harrimaniae Trel. | YUHA |
| Spanish bayonet | Yucca harrimaniae Trel. var. harrimaniae | YUHAH |
| Spanish bayonet | Yucca harrimaniae Trel. var. sterilis Neese & Welsh | YUHAS |
| spice lily | Manfreda maculosa (Hook.) Rose | MAMA7 |
| tequila agave | Agave tequilana A. Weber | AGTE7 |
| Texas yucca | Yucca rupicola Scheele | YURU |
| Thompson's yucca | Yucca thompsoniana Trel. | YUTH |
| thorncrest century plant | Agave univittata Haw. | AGUN2 |
| Toft's yucca | Yucca angustissima Engelm. ex Trel. var. toftiae (Welsh) Reveal | YUANT |
| Tonto Basin century plant | Agave delamateri W.C. Hodgson & L. Slauson | AGDE10 |
| Torrey's yucca | Yucca torreyi Shafer | YUTO |
| Toumey's century plant | Agave toumeyana Trel. ex Standl. | AGTO |
| Toumey's century plant | Agave toumeyana Trel. ex Standl. var. bella Breitung | AGTOB |
| Toumey's century plant | Agave toumeyana Trel. ex Standl. var. toumeyana | AGTOT |
| Trelease's century plant | Agave schottii Engelm. var. treleasei (Toumey) Kearney & Peebles | AGSCT |
| tuberose | Manfreda Salisb. | MANFR |
| tuberose | Polianthes tuberosa L. | POTU4 |
| twistleaf yucca | Yucca pallida McKelvey | YUPA |
| Utah agave | Agave utahensis Engelm. | AGUT |
| Utah agave | Agave utahensis Engelm. var. eborispina (Hester) Breitung | AGUTE |
| Utah agave | Agave utahensis Engelm. var. utahensis | AGUTU |
| viper's bowstring hemp | Sansevieria trifasciata hort. ex Prain | SATR6 |
| weak-leaf yucca | Yucca flaccida Haw. | YUFL2 |
| Weber's century plant | Agave weberi Cels ex Poisson | AGWE |
| whiterim yucca | Yucca tenuistyla Trel. | YUTE |
| wild century plant | Agave neglecta Small | AGNE3 |
| wild sisal | Furcraea selloa K. Koch | FUSE |
| yucca | Yucca L. | YUCCA |
| Yucca ?schottii | Yucca arizonica McKelvey | YUAR |
| Yucca ?schottii | Yucca baccata Torr. var. brevifolia (Schott ex Torr.) L. Benson & Darrow | YUBAB2 |
| Yucca ?schottii | Yucca brevifolia Schott ex Torr. | YUBR2 |
| Yucca ?schottii | Yucca macrocarpa Engelm., non Merriam | YUMA3 |
| Yucca ?schottii | Yucca puberula Torr. | YUPU |
| Yucca ?schottii | Yucca thornberi McKelvey | YUTH2 |
| Yucca ?schottii | Yucca treleasei J.F. Macbr. | YUTR2 |
| Yucca angustissima var. angustissima | Yucca angustissima Engelm. ex Trel. var. avia Reveal | YUANA |
| Yucca angustissima var. kanabensis | Yucca kanabensis McKelvey | YUKA2 |
| Yucca angustissima var. toftiae | Yucca toftiae Welsh | YUTO2 |
| Yucca arkansana | Yucca angustissima Engelm. ex Trel. var. mollis Engelm. | YUANM |
| Yucca baccata | Yucca baccata Torr. var. baccata Torr. [superfluous autonym] | YUBAB |
| Yucca baccata | Yucca baccata Torr. var. vespertina McKelvey | YUBAV |
| Yucca baccata | Yucca confinis McKelvey | YUCO2 |
| Yucca baccata | Yucca vespertina (McKelvey) Welsh | YUVE2 |
| Yucca baileyi var. baileyi | Yucca standleyi McKelvey | YUST2 |
| Yucca baileyi var. intermedia | Yucca intermedia McKelvey | YUIN |
| Yucca baileyi var. navajoa | Yucca navajoa J.M. Webber | YUNA |
| Yucca brevifolia var. brevifolia | Clistoyucca brevifolia (Engelm.) Rydb. | CLBR3 |
| Yucca brevifolia var. brevifolia | Yucca brevifolia Engelm. var. herbertii (J.M. Webber) Munz | YUBRH |
| Yucca campestris | Yucca intermedia McKelvey var. ramosa McKelvey | YUINR |
| Yucca elata | Yucca angustissima Engelm. ex Trel. var. elata Engelm. | YUANE |
| Yucca elata | Yucca elata (Engelm.) Engelm. var. elata (Engelm.) Engelm. [superfluous autonym] | YUELE |
| Yucca elata | Yucca elata (Engelm.) Engelm. var. utahensis (McKelvey) Reveal | YUELU |
| Yucca elata | Yucca elata (Engelm.) Engelm. var. verdiensis (McKelvey) Reveal | YUELV |
| Yucca elata | Yucca utahensis McKelvey | YUUT2 |
| Yucca elata | Yucca verdiensis McKelvey | YUVE |
| Yucca faxoniana | Samuela carnerosana auct. non Trel. [misapplied] | SACA40 |
| Yucca faxoniana | Samuela faxoniana Trel. | SAFA9 |
| Yucca faxoniana | Yucca carnerosana auct. non (Trel.) McKelvey [misapplied] | YUCA2 |
| Yucca filamentosa | Yucca concava Haw. | YUCO3 |
| Yucca filamentosa | Yucca filamentosa L. var. concava (Haw.) Baker | YUFIC |
| Yucca flaccida | Yucca filamentosa L. var. smalliana (Fern.) Ahles | YUFIS |
| Yucca flaccida | Yucca smalliana Fern. | YUSM |
| Yucca glauca var. glauca | Yucca angustifolia Pursh | YUAN |
| Yucca guatemalensis | Yucca elephantipes Regel | YUEL2 |
| Yucca harrimaniae var. harrimaniae | Yucca gilbertiana (Trel.) Rydb. | YUGI2 |
| Yucca harrimaniae var. harrimaniae | Yucca harrimaniae Trel. var. gilbertiana Trel. | YUHAG |
| Yucca harrimaniae var. neomexicana | Yucca neomexicana Woot. & Standl. | YUNE4 |
| Yucca louisianensis | Yucca arkansana Trel. var. paniculata McKelvey | YUARP |
| Yucca louisianensis | Yucca freemanii Shinners | YUFR |
| Yucca madrensis | Yucca schottii auct. non Engelm. [misapplied] | YUSC3 |
| Yucca pallida | Yucca rupicola Trel. | YURU2 |
| Yucca rupicola | Yucca tortifolia Lindl. ex Engelm. | YUTO3 |
| Yucca schidigera | Yucca californica Nutt. ex Baker | YUCA3 |
| Yucca schidigera | Yucca macrocarpa Merriam, non Engelm. | YUMA |
| Yucca schidigera | Yucca mohavensis Sarg. | YUMO2 |
| Yucca thompsoniana | Yucca rostrata Engelm. ex Trel. | YURO |
| Yucca thompsoniana | Yucca rostrata Engelm. ex Trel. var. linearis Trel. | YUROL |
| Yucca torreyi | Yucca baccata Torr. var. macrocarpa Torr. | YUBAM |
| Yucca torreyi | Yucca crassifolia Engelm. | YUCR |
| Yucca torreyi | Yucca macrocarpa (Torr.) Coville | YUMA2 |
| Yucca treculeana var. treculeana | Yucca treculeana Carr. var. canaliculata Trel. | YUTRC |