Avena
Meikle, R.D. 1985: Flora of Cyprus 2 but modified and names used differing
| 1 | Callus 5-7 mm long, with a sharp articulation |
| 1' | Callus short, inarticulate or articulate, if the latter, callus cushion-like |
| 2 | Glumes very unequal, the lower 10-15 mm, the upper 20-25 mm long |
| 2' | Glumes more or less equal in length |
| 3 | Lemmas with 2 fine bristles or awns up to 12 mm long from the apical lobes, in addition to the dorsal awn |
| 3' | Lemmas 2-toothed at the apex, rarely produced into 2 bristles and if so, the bristles not more than 2 mm long |
| 4 | Bristles exceeding the length of the glumes |
| 4' | Bristles shorter than the tips of the glumes |
| 5 | Lobes of the lemma gradually tapering into the bristle; glumes 20-30 mm long |
| 5' | Lobes of the lemma toothed below the base of the bristle; glumes 12-20 mm long |
| 6 | Lowest lemma not articulated with the rhachilla; caryopsis corticate, i.e. adherent to lemma and palea |
| 6' | Lowest lemma articulated with the rhachilla |
| 7 | Spikelets 3-5-flowered; glumes 30-50 mm long; lowest lemma 25-40 mm long; anthers 4 mm long |
| 7' | Spikelets 2-3-flowered; glumes 25-30 mm long; lowest lemma 20-25 mm long; anthers 2.5-3 mm long |
