. Gray's new manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada. Botany. ;il. C. C. Grayii. ( dm. high), much exceeding the smooth (or scabrous- margined) flat (2-5 mm. wide) leaves ; umbel with numer- ous ascending rays, the longest half as long as the involucre ; heads globose, cm. in diameter; spikelets 20-40, greenish, rather loosely spreading, lance-cylindric, slightly compressed, of 5-8 membranous veiny ovate-lanceolate scales (the 2 lowest and the subulate terminal one empty) ; achene ob- l
. Gray's new manual of botany. A handbook of the flowering plants and ferns of the central and northeastern United States and adjacent Canada. Botany. ;il. C. C. Grayii. ( dm. high), much exceeding the smooth (or scabrous- margined) flat (2-5 mm. wide) leaves ; umbel with numer- ous ascending rays, the longest half as long as the involucre ; heads globose, cm. in diameter; spikelets 20-40, greenish, rather loosely spreading, lance-cylindric, slightly compressed, of 5-8 membranous veiny ovate-lanceolate scales (the 2 lowest and the subulate terminal one empty) ; achene ob- long, mm. long. — Rich sandy soil, Va. and Mo., southw. Fig. 230. ;!1. C. flXvus (Vahl) Boeckl. Culms sharply angled, smooth and wiry (2-5 dm. high), much exceed- ing the smooth flat leaves ; heads 3-t), cylindrio ( cm. long), sessile in a glomerule; involucral bracts divei'gent or reflexed; spikelets crowded, ujm. long, dull, pale brown ; scales thin and veiny, the lowest often persistent. — Waste ground, about Philadelphia. (Adv. from the Tropics.) Fig. 231. 32. C. Grkyii Torr. Culm thread-form, wiry ( dm. high) ; leaves almost bristle-shaped, channeled; umbel simple, i-U-rayed ; spikelets in a loose head, spread- ing; joints of the axis winged; scales rather obtuse, green- ish-chestnuVcolor, barely exceeding the oblong or narrowly obovoid achene.—Barren sands, Mass. to N. J., near the coast. Fig. 232. 33. Culms obtusely angled (2-7 dm. high), much exceeding the smooth nar- row leaves; umbel subsessile or with a few elongate upright rays, mostly shorter than the invo- lucre ; spikelets linear-oblong, in loose heads, spreading-asceiiding; scales roundish, strongly nerved, mucronate, yellow- brown, barely exceeding the broad-obovoid achene. — Sandy soil, w. K. E. to Man. and Ore., locally s. to Va., Kan., and Ariz. Fig. 233. 34. C. filiciilmis Vahl. Culm slender, wiry, often reclined ( dm. high); leaves linear or filiform; spi
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