The Witcombe classification [reference] was published by Biodiversity International (formerly the International Plant Genetic Resources Institute (IPGRI) and the International Board for Plant Genetic Resources (IBPGR)) as a guide for germ plasm work. It is presented here with corrections in nomenclature and authority citations.
| Section Comopyrum (Jaub. & Spach) Zhuk. | |
| Aegilops comosa Sibth & Sm. | |
| Aegilops uniaristata Vis. | |
| Section Cylindropyrum (Jaub. & Spach) Zhuk. | |
| Aegilops caudata L. | [ambiguous] |
| Aegilops cylindrica Host | |
| Section Aegilops | |
| Aegilops columnaris Zhuk. | |
| Aegilops kotschyi Boiss. | |
| Aegilops lorentii Hochst. | [synonymous] |
| Aegilops ovata L. | [ambiguous] |
| Aegilops triaristata Willd. (4x and 6x) | [ambiguous] |
| Aegilops triuncialis L. | |
| Aegilops umbellulata Zhuk. | |
| Aegilops peregrina (Hackel in J.Fraser) Maire & Weiller | |
| Section Sitopsis (Jaub. & Spach) Zhuk. | |
| Aegilops bicornis (Forsskål) Jaub. & Spach. | |
| Aegilops ligustica (Savig.) Cosson | |
| Aegilops longissima (Schweinf. & Muschl. in Muschl.) Eig | |
| Aegilops sharonensis Eig | |
| Aegilops speltoides Tausch | |
| Aegilops searsii Feldman & Kislev ex Hammer | |
| Section Vertebrata Zhuk. | |
| Aegilops crassa Boiss. (4x and 6x) | |
| Aegilops juvenalis (Thell.) Eig | |
| Aegilops squarrosa L. | [illegitimate] |
| Aegilops vavilovii (Zhuk.) Chennav. | |
| Aegilops ventricosa Tausch | |
| Section Amblyopyrum (Jaub. & Spach) Eig | |
| Aegilops mutica Boiss. |