. Agricultural botany, theoretical and practical. Botany, Economic; Botany. ' HASSOCK' GRASS 537 This form when established on arable land is a troublesome pest, only satisfactorily eradicated by hand-picking. Genus Deschampsia (Aira). Panicle spreading; spikelets with two flowers and a rudimen- tary third; empty glumes keeled, unequal, blunt; flowering glume with a dorsal awn. Wavy Hair-Grass {Deschampsia flexuosa Tr' Aira^exuosa L.).—A perennial grass, growing about 12 to 18 inches high, with very narrow, almost solid, leaves: common on dry sandy heaths and pastures. The branches of the r
. Agricultural botany, theoretical and practical. Botany, Economic; Botany. ' HASSOCK' GRASS 537 This form when established on arable land is a troublesome pest, only satisfactorily eradicated by hand-picking. Genus Deschampsia (Aira). Panicle spreading; spikelets with two flowers and a rudimen- tary third; empty glumes keeled, unequal, blunt; flowering glume with a dorsal awn. Wavy Hair-Grass {Deschampsia flexuosa Tr' Aira^exuosa L.).—A perennial grass, growing about 12 to 18 inches high, with very narrow, almost solid, leaves: common on dry sandy heaths and pastures. The branches of the rachis are often wavy or flexuous, hence the name. The spikelets are pur- plish or brownish green in colour, and have a shining silky appearance. This grass is of no agri- cultural value, but its' seeds' are often substituted for those of golden oat-grass or used in adulterating the latter (see p. 665). Tufted Hair-Grass: ' Tus- sock ' Grass; ' Hassock' Grass (D. caspitosa Beauv. /^ = Aira caspitosa L.). perennial resembling the latter in colour of spikelets and several other particulars. Its leaves are, however, flat, and of leathery texture; the awn of the flowering glume is shorter than that of the preceding species, and scarcely exceeds the length of the empty ^ Fig. T-n.—A, Panicle of Wavy Hair-Grass (natural size). B^ Spikelet (twice natural size).. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Percival, John, 1863-1949. New York, H. Holt
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1910
