British grasses and their employment in agriculture . Fig. 40. Spike-like panicles of (a) Meadow Foxtail, and (b) Slender nat. size. upper surface almost ribless, usually hairy, and downwards roughnear apex; lower surface .slightly keeled at base of blade. Thereare no auricles and the ligule is blunt. A variety of this specieswith the lower internodes very much thickened is a troublesomeweed on some cultivated soils. It is known as Onion Couch/See Fig. 54. ch. vn] Botanical Description of Species 65 Flowers usually in June; culms 2-4 feet high. Panicle large,6-10 inches long, lea


British grasses and their employment in agriculture . Fig. 40. Spike-like panicles of (a) Meadow Foxtail, and (b) Slender nat. size. upper surface almost ribless, usually hairy, and downwards roughnear apex; lower surface .slightly keeled at base of blade. Thereare no auricles and the ligule is blunt. A variety of this specieswith the lower internodes very much thickened is a troublesomeweed on some cultivated soils. It is known as Onion Couch/See Fig. 54. ch. vn] Botanical Description of Species 65 Flowers usually in June; culms 2-4 feet high. Panicle large,6-10 inches long, leaning slightly towards one side; the brancheskeep close to the main axis at first but spread at time of 8-10 mm. long, containing two flowers, the upper onehermaphrodite, the lower one staminate. Empty glumes very. 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.)


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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, booksubjectgr