British erbe e il loro impiego in agricoltura . Fig. 39. Panicle di Aim ccespitosa, circa J nat. dimensioni. e impastare (basale o quasi basale) awn nettamente più thanitself. Una cospicua ciuffo di capelli bianchi capelli setosi circonda thebase del seme. Eachilla relativamente breve, anche i peli bearingwhite. (Fig. II.) Aira canescens, L. (capelli grigi-erba.) ago-come le foglie; awn basale ispessita, alla fine, e il cuscinetto ch. vn] Descrizione Botanica di specie 59 un ciuffo di peli nel mezzo. Id Gran Bretagna, noto solo a occuron le rive sabbiose dell Oriente ADglia. Aira caryophyllea, L. (capelli argenteo-erba.) (Fig

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British grasses and their employment in agriculture . Fig. 39. Panicle of Aim ccespitosa, about J nat. size. and kneed basal (or almost basal) awn distinctly longer thanitself. A conspicuous tuft of white silky hairs surrounds thebase of the seed. Eachilla relatively short, also bearingwhite hairs. (Fig. II.) Aira canescens, L. (Grey Hair-grass.) Needle-like leaves; awn basal, thickened at end, and bearing ch. vn] Botanical Description of Species 59 a tuft of hairs in the middle. Id Britain, only known to occuron the sandy shores of East ADglia. Aira caryophyllea, L. (Silvery Hair-grass.) (Fig. 42.) An annual, with rather rough needle-like leaves, growingabout six inches high, and found mostly on poor uplands. Panicle erect and spreading; spikelets containing two flowers, the empty glumes equal. Seed dark-brown or almost black; about 1-5 mm. long, with a basal hair-tuft. Outer palea bifid at its apex, and bearinga dorsal (or almost basal) twisted and kneed awn about twiceits own length. (Fig. 43.). 40. Seed of Airaccespitosa. x 10. A.Front view. B. Sideview. Pig. 41. Seed of Aira flexuosa. x 10. A.view, showing position of the awn. B.view. BackFront Aira prwcox, L. (Early Hair-grass.) An annual, almost identical in structure and habitat withA. caryophyllea. It is however usually a smaller plant, and thebranches of the panicle remain close to the main axis. Alopecurus pratensis, L. (Meadow Foxtail.) (Figs. 44, 150.)Abundant in Britain in moist meadows and pastures (see p. 135). A slightly stoloniferous, and entirely glabrous perennial, forming loose tufts of abundant dark-green foliage. Sheathssmooth, split; the lower ones often of a purplish colour near theground, and becoming a dark chocolate colour as they age; theuppermost ones become inflated just before flowering, and remain 60 Botanical Section [ft I so afterwards. Blade rolled in the shod, rather thin, broadestjust above its base: acuminate above, and forming roundedcollar-like ledges below where it joins the sh

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• bookcentury1900
• bookdecade1910
• booksubjectbotany
• booksubjectgr