. 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. 17. S. vdlidus Vahl. (Great B.) Rootstook stout, scaly, horizontal; culm rii. high, cm. thick at base, soft, light green; basal sheaths soft, with soon lacerate hyaline margin; decom- pound panicle lax, the rays 1-6 cm. long, slender and flexuous; bractlets brownish, pubescent at tip, fimbriate dilate, with strongly excurrent midrib ; spikelets solitary or in glomerules of 2-5, rnfescent, ovoid, acutish, 5-10 mm. long ; scales su
. 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. 17. S. vdlidus Vahl. (Great B.) Rootstook stout, scaly, horizontal; culm rii. high, cm. thick at base, soft, light green; basal sheaths soft, with soon lacerate hyaline margin; decom- pound panicle lax, the rays 1-6 cm. long, slender and flexuous; bractlets brownish, pubescent at tip, fimbriate dilate, with strongly excurrent midrib ; spikelets solitary or in glomerules of 2-5, rnfescent, ovoid, acutish, 5-10 mm. long ; scales suborbicular, a little pubes- cent on the back, ciliate, mucronate ; style 2-cleft; achene fuscous or dull black when ripe, broad-obovoid, plano-convex, mucronate, broad. (iS. lacus- tris, mostly of Am. auth., not L.) — Mar- gins of ponds and quiet streams. July, Aug. Fig. 290. 18. S. occidentHlis (Wats.) Chase. Similar; the culms harder, olive-green ; basal sheaths firmer, the margins becom- ing fibrillose ; panicle compound, the rays cm. long, stiff; bractlets red-spotted, viscid at tip, lacerate-fimbriate, abruptly mucronate; spikelets mostly in glomerules of 2-7, rarely solitary, drab to reddish-brown, subcylindric, 1-2 cm. jg; g occldentalis long ; scales oblong-ovate, aristate, red-dotted, viscid above; ' ' achene biconvex, mm. broad. — Lake-borders, Nfd. to B. C, s. to Mass., N. Y., Great Lakes, Mo., etc. Aug., Sept. Fig. 291. 19. S- heterochaStus Chase. Similar ; the culms slender, rarely 1 cm. thick at base, pale green ; panicle compound, the suberect very slender rays 1-9 cm. long; bractlets pale, aristate-acuminate, glabrous; spike- lets solitary, ellipsoid, 8-14 mm. long, pale brown ; scales ovate-oblong, exceeding the achenes, emarginate, short- aristate, slightly red-dotted, glabrous, with erose-flmbriate margins; style S-cleft; bristles fragile, 2-4; achene greenish or yellowish, mm. long, mm. broad. — Marshes and sheltere
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