British grasses and their employment in agriculture . uch. Flowers about June; culms erect, smooth, finely striated, from 18-24 inches high. Panicle erect, rather close and almost simple. Spikelets large, oval, 3-6 flowered; empty glumes unequal, acute, and keeled, with a prominent nerve on either side of the keel. The upper and larger glume is of a purple colour below, and silvery-white and membranous above and along its margins. 72 Botanical Section [pt I Seed. Outer palea about 9 mm. long, white and membran-ous at its apex which is 2-4 toothed; bearing a slightly twistedand kneed dorsal awn
British grasses and their employment in agriculture . uch. Flowers about June; culms erect, smooth, finely striated, from 18-24 inches high. Panicle erect, rather close and almost simple. Spikelets large, oval, 3-6 flowered; empty glumes unequal, acute, and keeled, with a prominent nerve on either side of the keel. The upper and larger glume is of a purple colour below, and silvery-white and membranous above and along its margins. 72 Botanical Section [pt I Seed. Outer palea about 9 mm. long, white and membran-ous at its apex which is 2-4 toothed; bearing a slightly twistedand kneed dorsal awn. Inner palea very thin, flat and long, slender, cylindrical, and bearing numerous longsilky hairs. The base of the seed is surrounded by a largebrush of hairs. (Fig. 61.) A. pubescens, Huds. A marked variety of the above. Thelower leaves and sheaths are distinctly hairy, and less harsh to thetouch. The outer palea is rather shorter, and the rachilla longerand more feathered with hairs. The panicle also is more silveryin Fig. 55. Seed of Arrhenatherum , Beauv. x grain is enclosed within the upper pair of palese. ch. vii Botanical Description of Species 73 kvaaafatua, L. (Wild Oat.) (Fie;. 60.) Abundant in Britain. A tall annual, occurring especiallv among cereal crops, formingclose tufts. Shoot cylindrical, sheaths split, glabrous or occasion-ally with a few hairs. Leaf-blades linear, broad, acuminate,glabrous or slightly hairy. Ligule membranous, relatively blunt. Auricles wanting.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, booksubjectgr
