| Common Name | Scientific Name | Code |
|---|
| n/a | Celtis africana Burm. f. | CEAF3 |
| n/a | Celtis choseniana Nakai | CECH6 |
| n/a | Celtis glabrata Steven ex Planch. | CEGL5 |
| n/a | Celtis jessoensis Koidz. | CEJE3 |
| n/a | Celtis occidentalis L. var. cordata Willd. | CEOCC4 |
| n/a | Celtis tala Gillies [excluded] | CETA3 |
| n/a | Celtis yunnanensis C. K. Schneid. | CEYU2 |
| n/a | Trema cannabinum Lour. [excluded] | TRCA33 |
| n/a | Trema orientale (L.) Bl. var. viridis Lauterb. | TRCA12 |
| n/a | Trema zeylanica (L.) J. Bennett [excluded] | TRZE2 |
| n/a | Ulmus ?notha Wilhelm & G. Ware, hyb. nov. ined. [pumila ? rubra] | ULNO |
| almex | Celtis trinervia Lam. | CETR3 |
| American elm | Ulmus americana L. | ULAM |
| Bunge's hackberry | Celtis bungeana Blume | CEBU2 |
| Caucasian hackberry | Celtis caucasica Willd. | CECA18 |
| cedar elm | Ulmus crassifolia Nutt. | ULCR |
| Celtis ehrenbergiana | Celtis pallida Torr. | CEPA8 |
| Celtis ehrenbergiana | Celtis spinosa Spreng. var. pallida (Torr.) M.C. Johnston | CESPP2 |
| Celtis ehrenbergiana | Celtis tala Gillies var. pallida (Torr.) Planch. | CETAP |
| Celtis ehrenbergiana | Momisia pallida (Torr.) Planch. | MOPA6 |
| Celtis iguanaea | Momisia iguanaea (Jacq.) Rose & Standl. | MOIG |
| Celtis laevigata var. brevipes | Celtis brevipes S. Wats. | CEBR7 |
| Celtis laevigata var. laevigata | Celtis laevigata Willd. var. anomala Sarg. | CELAA |
| Celtis laevigata var. laevigata | Celtis laevigata Willd. var. brachyphylla Sarg. | CELAB2 |
| Celtis laevigata var. reticulata | Celtis douglasii Planch. | CEDO |
| Celtis laevigata var. reticulata | Celtis occidentalis L. var. reticulata (Torr.) Sarg. | CEOCR |
| Celtis laevigata var. reticulata | Celtis reticulata Torr. | CERE2 |
| Celtis laevigata var. reticulata | Celtis reticulata Torr. var. vestita Sarg. | CEREV |
| Celtis occidentalis | Celtis canina Raf. | CECA9 |
| Celtis occidentalis | Celtis occidentalis L. var. canina (Raf.) Sarg. | CEOCC |
| Celtis occidentalis | Celtis occidentalis L. var. crassifolia (Lam.) Gray | CEOCC3 |
| Celtis occidentalis | Celtis occidentalis L. var. occidentalis L. [superfluous autonym] | CEOCO2 |
| Celtis occidentalis | Celtis occidentalis L. var. pumila (Pursh) Gray | CEOCP |
| Celtis occidentalis | Celtis pumila Pursh | CEPU10 |
| Celtis occidentalis | Celtis pumila Pursh var. deamii Sarg. | CEPUD2 |
| Celtis tenuifolia | Celtis georgiana Small | CEGE2 |
| Celtis tenuifolia | Celtis laevigata Willd. var. smallii (Beadle) Sarg. | CELAS3 |
| Celtis tenuifolia | Celtis mississippiensis Bosc | CEMI9 |
| Celtis tenuifolia | Celtis occidentalis L. var. georgiana (Small) Ahles | CEOCG |
| Celtis tenuifolia | Celtis pumila Pursh var. georgiana (Small) Sarg. | CEPUG |
| Celtis tenuifolia | Celtis smallii Beadle | CESM |
| Celtis tenuifolia | Celtis tenuifolia Nutt. var. georgiana (Small) Fern. & Schub. | CETEG |
| Celtis tenuifolia | Celtis tenuifolia Nutt. var. soperi Boivin | CETES |
| cherry-bark elm | Ulmus villosa Brandis ex Gamble | ULVI |
| Chinese elm | Ulmus parvifolia Jacq. | ULPA |
| Chinese hackberry | Celtis sinensis Pers. | CESI8 |
| common hackberry | Celtis occidentalis L. | CEOC |
| Dutch elm | Ulmus ?hollandica Mill. | ULHOH |
| dwarf hackberry | Celtis tenuifolia Nutt. | CETE |
| elm | Ulmus L. | ULMUS |
| English elm | Ulmus procera Salisb. | ULPR |
| European hackberry | Celtis australis L. | CEAU8 |
| hackberry | Celtis L. | CELTI |
| iguana hackberry | Celtis iguanaea (Jacq.) Sarg. | CEIG |
| Jamaican nettletree | Trema micranthum (L.) Blume | TRMI2 |
| Japanese elm | Ulmus davidiana Planch. | ULDA |
| Japanese elm | Ulmus davidiana Planch. var. japonica (Rehd.) Nakai [excluded] | ULDAJ |
| Japanese zelkova | Zelkova serrata (Thunb.) Makino | ZESE80 |
| Lamarck's trema | Trema lamarckianum (J.A. Schultes) Blume | TRLA2 |
| Lindheimer's hackberry | Celtis lindheimeri Engelm. ex K. Koch | CELI |
| netleaf hackberry | Celtis laevigata Willd. var. reticulata (Torr.) L. Benson | CELAR |
| Oriental hackberry | Celtis tournefortii Lam. | CETO5 |
| Oriental trema | Trema orientale (L.) Blume | TROR |
| planertree | Planera aquatica J.F. Gmel. | PLAQ |
| planertree | Planera J.F. Gmel. | PLANE |
| rock elm | Ulmus thomasii Sarg. | ULTH |
| September elm | Ulmus serotina Sarg. | ULSE |
| Siberian elm | Ulmus pumila L. | ULPU |
| slippery elm | Ulmus rubra Muhl. | ULRU |
| spiny hackberry | Celtis ehrenbergiana (Klotzsch) Liebm. | CEEH |
| sugarberry | Celtis laevigata Willd. | CELA |
| sugarberry | Celtis laevigata Willd. var. brevipes (S. Wats.) Sarg. | CELAB |
| sugarberry | Celtis laevigata Willd. var. laevigata | CELAL |
| Texan sugarberry | Celtis laevigata Willd. var. texana Sarg. | CELAT8 |
| trema | Trema Lour. | TREMA |
| Trema micranthum | Calyptracordia alba Jacq. | CAAL16 |
| Trema micranthum | Cordia alba (Jacq.) Roemer & J.A. Schultes | COAL5 |
| Trema micranthum | Cordia dentata Poir. | CODE7 |
| Trema micranthum | Trema floridanum Britt. | TRFL9 |
| Ulmus americana | Ulmus americana L. var. floridana (Chapman) Little | ULAMF2 |
| Ulmus americana | Ulmus floridana Chapman | ULFL |
| Ulmus davidiana var. japonica | Ulmus japonica (Rehd.) Sarg. [excluded] | ULJA3 |
| Ulmus davidiana var. japonica | Ulmus wilsoniana C. K. Schneid. | ULWI2 |
| Ulmus glabra | Ulmus campestris L. p.p. | ULCA |
| Ulmus parvifolia | Ulmus chinensis Pers. | ULCH |
| Ulmus procera | Ulmus campestris L. p.p. | ULCA |
| Ulmus procera | Ulmus carpinifolia auct. non Ruppius ex G. Suckow [misapplied] | ULCA2 |
| Ulmus procera | Ulmus minor auct. non P. Mill. [misapplied] | ULMI |
| Ulmus rubra | Ulmus fulva Michx. | ULFU |
| Ulmus thomasii | Ulmus racemosa D. Thomas | ULRA |
| winged elm | Ulmus alata Michx. | ULAL |
| Wych elm | Ulmus glabra Huds. | ULGL |
| zelkova | Zelkova Spach | ZELKO8 |
Plant Names