. 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. QGRASS FAMILY) lay '^ 4. S. paliistris (Michx.) Scribn. Gulma 6-10 dm. high; sheaths and leaves glabrous, or lower sheaths sometimes pubescent; leaves 8-12 cm. long, 3-6 mm. wide, scabrous; panicles 10-20 cm. long, narrow ; spikelets 6-7 mm. long; glumes similar, lanceolate, acute, subequal; lemmas lanceolate, the first acute or acuminate-pointed, awn- less, rarely short-awned; the second bearing a slender divergent awn below the acut
. 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. QGRASS FAMILY) lay '^ 4. S. paliistris (Michx.) Scribn. Gulma 6-10 dm. high; sheaths and leaves glabrous, or lower sheaths sometimes pubescent; leaves 8-12 cm. long, 3-6 mm. wide, scabrous; panicles 10-20 cm. long, narrow ; spikelets 6-7 mm. long; glumes similar, lanceolate, acute, subequal; lemmas lanceolate, the first acute or acuminate-pointed, awn- less, rarely short-awned; the second bearing a slender divergent awn below the acute or 2-toothed apex; awn 4-5 mm. long. ( Trisetum pennsylvanicum Man. ed. 6, not Avena pennsylvanicd L.; T. palustre Trin.) — Low grounds, Mass. to 111. and soutbw. Var. PLExn6sA Scribn. Culms 4-6 dm. high; panicles 8-12 dm. long, open, the fiexuous branches widely spreading at least in flower; spikelets 4-5 mm. long, the first fioret usually awned. — Del. {Commons), Pa. (Heller). Fig. 118. 118. 8. pal., V. flex. Spikelet X 3. 42. KOELERIA Pers. Spikelets 2-4-flowered ; rhachilla prolonged into a naked pedicel behind the upper palea ; glumes unequal, slightly shorter than the florets, membranaceous, acute, the first 1-nerved, the second 3-nerved ; lemma ohar- taceous-membranaceous, the margins scarious, faintly 3-5- nerved, acute or mucronate ; palea hyaline; grain loosely inclosed within the subrigid lemma, free. —Tufted perennials with narrow leaves and densely flowered terminal spike-like panicles. (Named for Frof. &. L. Koeler, an early writer on grasses.) , 1. K. crist^ta (L.) Pers. Culms «rect, 3-6 dm. high, leafy at the base ; sheaths retrorsely pubescent, at least the lower ; blades flat or becoming involute ; panicle cylindrical, 4-15 cm. long, often interrupted at base, pale and shining; spikelets 4-5 mm. long; the glumes and lemmas scabrous. — Dry soil, Ont. and 0. to B. C, and southw. ; introduced in N. E. (Eurasia.) — Very variable. Fig. 119. TRISETU
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