. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 51. DESCHAMPSIA Beauv. Agrost. 91. pi. 18. f. 3. 1812. Perennial grasses with flat or involute leaf-blades, and contracted or open panicles. Spikelets 2-flowered, both flowers perfect, the hairy rachilla extended beyond the flowers or rarely terminated by a staminate one. Scales 4 (rarely more), the 2 lower empty, keeled, acute, membranous, shining, persistent;
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 51. DESCHAMPSIA Beauv. Agrost. 91. pi. 18. f. 3. 1812. Perennial grasses with flat or involute leaf-blades, and contracted or open panicles. Spikelets 2-flowered, both flowers perfect, the hairy rachilla extended beyond the flowers or rarely terminated by a staminate one. Scales 4 (rarely more), the 2 lower empty, keeled, acute, membranous, shining, persistent; the flowering scales of about the same texture, deciduous, bearing a dorsal awn, the apex toothed. Palet narrow, 2-nerved. Stamens 3. Styles distinct. Stigmas plumose. Grain oblong, free, enclosed in the scale. [In honor of J. C. A. Loiseleur-Deslongchamps, 1774-1849, French physician and botanist.] About 20 species, inhabiting cold and temperate regions, a few occurring in the high mountains of the tropics. Besides the following, some 6 others occur in the western parts of Nort America. Type species: Aira caespitosa L. Upper flowering scale reaching or extending beyond the apex of the empty scales. about iJ4" long, erose-truncate; leaves flat. 1. D. caespitosa. Flowering scales about 2" long, acute or obtuse; leaves involute. 2. D. flexuosa. Empty scales extending much beyond the upper flowering scale. 3. D. atropurpurea. i. Deschampsia caespitosa (L.) Beauv. Tufted Hair-grass. Fig. Aira caespitosa L. Sp. PI. 64. 1753. D. caespitosa Beauv. Agrost. 160. pi. 18. f. 3. 1812. Culms 2°-4° tall, erect, simple, smooth and glabrous. Sheaths much shorter than the internodes; ligule i"-3" long; blades flat, i"-ii" wide, smooth beneath, strongly scabrous above, the basal ones numerous, one-quarter to one-half as long as the culm, those of the culm 2'-6' long; panicle open, 3'-g' in length, the branches widely spreading or ascending,
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
