Glumes connate below, silky-hairy on keel and ribs all the way up. The palea has a bent dorsal awn, about 5 mm. long.
Alopecurus geniculatus, L.
Palea 2 mm., fruit 1·3 mm. long.
The glumes hairy on ribs and keel as in A. pratensis: glumes more obtuse.
Alopecurus agrestis, L.
Palea 6 mm., fruit 3 mm. long.
Glumes only ciliate, on ribs and keel, except at the base where the hairs are longer.
Keel slightly winged.
Best distinguished from A. pratensis by the glumes, which are smoother, broader above the middle, harder and with a few basal hairs.
The species A. fulvus, A. bulbosus, and A. alpinus are rare.
(ii) “Seed" consisting of the paleæ investing the caryopsis, freed from the glumes.
✲ Palea at least 14 or 15 mm. long: caryopsis 5-7 mm. [Oat type.]
Avena fatua.
A. pratensis.
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Avena fatua. A. pratensis. |