Poa annua, L. (Fig. [43]).
Palea 3·5 and caryopsis 2 mm. long, so that the “seed" is much larger than P. trivialis, and there is no web. Minutely silky-hairy on the keel, and the ribs are strong for a Poa.
Poa alpina, L., has the palea five-ribbed with stiffish hairs below, but no web. Bronzy green-violet. “Seed" 3-3·5 mm. long. Caryopsis 1·5-2 mm., and slightly grooved. It is rare in England, and is interesting as it becomes viviparous in Alpine situations.
(2) Apex of palea distinctly pointed, acuminate or mucronate, but not giving rise to a true, long, bristle-like awn.
✲ Palea acuminate—i.e. taper pointed.
† Not compressed or obviously keeled.
Festuca ovina.
F. sylvatica.
Cynosurus cristatus.It is doubtful whether these should not be regarded as awned: if so they come near Nardus—see p. [130].
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Festuca ovina. F. sylvatica. Cynosurus cristatus. |
Festuca ovina, L. (Fig. [59]).
Palea rounded on the back, narrow, terete-lanceolate and five-nerved, tip scaberulous and drawn out to a stiff scabrid point half as long as the palea, or less. About 3-4 mm. long without the tip-point, 4-5·5 mm. with it. Rachilla obliquely truncate and concave at its apex.
Fig. 59. Festuca ovina. a, spikelet, × about 3-1/2. b, “seed," nat. size and × about 7. c, caryopsis, nat. size and × 7.