British grasses and their employment in agriculture . Fig. 47. Alopecurus agrestis. About \ nat. size. unequal, membranous, and acute; the upper and larger glume isthree-nerved, and often of a purple colour; the lower glumehas a dorsal nerve only. The seeds of this species are often sooted or smutted owing to the attacks of Vstilago perennans,one of the smut fungi. The seeds consist of the spikelets minus the empty glumes; A. 5 66 Botanical Section [PT I r their length without the awn varies from 6-10 mm. The outerpalea of the lower flower bears a long (10 mm. or more) twistedand kneed dorsal
British grasses and their employment in agriculture . Fig. 47. Alopecurus agrestis. About \ nat. size. unequal, membranous, and acute; the upper and larger glume isthree-nerved, and often of a purple colour; the lower glumehas a dorsal nerve only. The seeds of this species are often sooted or smutted owing to the attacks of Vstilago perennans,one of the smut fungi. The seeds consist of the spikelets minus the empty glumes; A. 5 66 Botanical Section [PT I r their length without the awn varies from 6-10 mm. The outerpalea of the lower flower bears a long (10 mm. or more) twistedand kneed dorsal awn. The outer palea of the upper flowerusually bears only a short sub-terminal awn-point, but it mayhave a dorsal, twisted and kneed awn; its apex is of the outer palese are distinctly nerved, and the margins ofboth inner palese are delicately fringed. Bach flower has a con-spicuous basal tuft of white hairs. (Fig. 55.) ( The twisting of the awns is only apparent when theseed is ripe.). Fig. 48. Seed of Alopecurus agrestis, L. x 10. Two views. Arundo Phragmiles, L. (Common Reed.) (Fig. 56.) Commonin Britain. A perennial aquatic species with creeping rhizomes. Sheathssmooth, split, bearded at the throat, where sheath and blade:meet. Leaves rolled in the shoot; blades about one foot long or GH. VIl] Botanical Description of Sj. oecies 67 more, and often more than an inch broad, linear-lanceolate andacuminate; smooth on both surfaces, but with numerous, low,flat ribs on the upper side. Ligule represented by a fringe of auricles. The loose sheaths allow the blades to turn awayfrom the direction of the strongest prevailing winds. Flowers about August; culms stout, erect, smooth, from 5 to8 feet high. Panicle large, compound, with branches turned in the IT W J
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, booksubjectgr
