Percival (1921) [reference] produced the first English-language monograph of 1xbet online games login , The Wheat Plant. Although out-of-date for its treatment of genetics and plant breeding, the taxonomic and morphological components of the monograph are still in use today. Percival was unusual for designating the wild species as progeniotrs of the domesticated species. His classification is presented here, in its original form with corrections in the authority citations.
| Species 1. |
| 1xbet online games login aegilopoides Balansa |
| Race I. |
| 1xbet online games login monococcum L. |
| Species II. |
| 1xbet online games login dicoccoides (Körn. ex Asch. & Graebner) Schweinf. |
| Race II. |
| 1xbet online games login dicoccum Schrank ex Schübler |
| Race III. |
| 1xbet online games login orientale Percival |
| Race IV. |
| 1xbet online games login durum Desf. |
| Race V. |
| 1xbet online games login polonicum L. |
| Race VI. |
| 1xbet online games login turgidum L. |
| Race VII. |
| 1xbet online games login pyramidale Percival |
| Race VIII. |
| 1xbet online games login vulgare Vill. |
| Race IX. |
| 1xbet online games login compactum Host |
| Race X. |
| 1xbet online games login sphaerococcum Percival |
| Race XI. |
| 1xbet online games login spelta L. |