| Common Name | Scientific Name | Code |
| n/a | Dioscorea esculenta (Lour.) Burkill var. esculenta (Lour.) Burk. | DIESE |
| n/a | Dioscorea esculenta (Lour.) Burkill var. tiliaefolia (Kunth) Fosberg & Sachet | DIEST |
| n/a | Dioscorea latifolia Benth. [excluded] | DILA25 |
| n/a | Dioscorea sagittata Poir. [excluded] | DISA20 |
| air yam | Dioscorea bulbifera L. | DIBU |
| bitter yam | Dioscorea dumetorum (Kunth) Pax | DIDU2 |
| bulbous yam | Dioscorea pilosiuscula Bertero ex Spreng. | DIPI |
| bush yam | Dioscorea praehensilis Benth. | DIPR4 |
| Chinese yam | Dioscorea oppositifolia L. | DIOP |
| Dioscorea cayenensis | Dioscorea cayennensis Lam. [orthographic error] | DICA10 |
| Dioscorea floridana | Dioscorea villosa L. var. floridana (Bartlett) Ahles | DIVIF |
| Dioscorea oppositifolia | Dioscorea batatas Dcne. | DIBA2 |
| Dioscorea quaternata | Dioscorea glauca Muhl. ex Bartlett | DIGL3 |
| Dioscorea quaternata | Dioscorea quaternata J.F. Gmel. var. glauca (Muhl. ex Bartlett) Fern. | DIQUG |
| Dioscorea quaternata | Dioscorea villosa L. var. glabrifolia (Bartlett) Fern. | DIVIG |
| Dioscorea villosa | Dioscorea hirticaulis Bartlett | DIHI |
| Dioscorea villosa | Dioscorea villosa L. var. hirticaulis (Bartlett) Ahles | DIVIH |
| dunguey | Dioscorea altissima Lam. | DIAL3 |
| fiveleaf yam | Dioscorea pentaphylla L. | DIPE2 |
| Florida yam | Dioscorea floridana Bartlett | DIFL4 |
| fourleaf yam | Dioscorea quaternata J.F. Gmel. | DIQU |
| Guinea yam | Dioscorea rotundata Poir. | DIRO |
| himber | Rajania cordata L. | RACO4 |
| hottentot-bread | Dioscorea elephantipes (L'Her.) Engl. | DIEL2 |
| Indian yam | Dioscorea trifida L. f. | DITR3 |
| intoxicating yam | Dioscorea hispida Dennst. | DIHI7 |
| Japanese yam | Dioscorea japonica Thunb. | DIJA2 |
| lesser yam | Dioscorea esculenta (Lour.) Burkill | DIES2 |
| mata gallina | Dioscorea polygonoides Humb. & Bonpl. ex Willd. | DIPO2 |
| Preuss's dioscorea | Dioscorea preussii Pax | DIPR5 |
| rajania | Rajania L. | RAJAN |
| water yam | Dioscorea alata L. | DIAL2 |
| wild yam | Dioscorea villosa L. | DIVI4 |
| yam | Dioscorea composita Hemsley | DICO15 |
| yam | Dioscorea convolvulacea Cham. & Schldl. | DICO16 |
| yam | Dioscorea floribunda C. Martius & Galeotti | DIFL5 |
| yam | Dioscorea L. | DIOSC |
| yam | Dioscorea macrostachya Benth. | DIMA15 |
| yam | Dioscorea nummularia Lam. | DINU4 |
| yam | Dioscorea spiculiflora Hemsley | DISP6 |
| yellow guinea yam | Dioscorea cayenensis Lam. | DICA25 |
| Zanzibar yam | Dioscorea sansibarensis Pax | DISA17 |