. 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. £46 GUAMINEAE (GRASS FAMILY) § 1. CHONDROSIUM (Desv.) Gray. Spikes 1-4, usually curved, of 25 o» more densely crowded pectinate spikelets. 1. B. oligostjlchya (Nutt.) Torr. Culms slender, erect, from a short root- stock, leafy ai, the base, dm. high ; sheaths and blades glabrous, the latter about 2 mm. wide, flat or becoming convolute; spikes 1-3, 2-5 cm. long; spikelets 5-fi mm. long; glumes narrow, the first about J as long as the second
. 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. £46 GUAMINEAE (GRASS FAMILY) § 1. CHONDROSIUM (Desv.) Gray. Spikes 1-4, usually curved, of 25 o» more densely crowded pectinate spikelets. 1. B. oligostjlchya (Nutt.) Torr. Culms slender, erect, from a short root- stock, leafy ai, the base, dm. high ; sheaths and blades glabrous, the latter about 2 mm. wide, flat or becoming convolute; spikes 1-3, 2-5 cm. long; spikelets 5-fi mm. long; glumes narrow, the first about J as long as the second, which is sparsely papillose- pilose on the keel; fertile lemma pilose, 3-cleft, the divisions awned; sterile lemma consisting of 2 truncate lobes and 8 divergent equal awns with a tvft of long hairs at base, second radiment obtuse, awnless.—Prairies, Wis. and N. Dak. to Tex. ; casual eastw. (Mex.) July-Sept. Fig. 2. B. hiisuta Lag. Culms tufted, erect, 2-5 dm. high, leafy at the base ; sheaths smooth; blades about 3 mm. wide, flat, sparsely papillose-hairy, especially on the margins; spikes 1-4, cm. long; the rhachis of the spike produced into a prominent point beyond the uppermost spikelets; spikelets about 5 mm. long ; first glume setaceous, the second equaling the floret, conspicuously tuberculate-hirsute on the back; fer- tile lemma pubescent, 3-cleft, the divisions awn-pointed; sterile floret of 2 obtuse lobes and 3 equal awns margined below, no tuft of hairs at the base. — Sandy plains, Wis. to Mo., and southwestw. to Mex. July-Sept. Fig. 138. 187. B. ollgostachva. Spikelet with detached x :^. 188. B. hlrsuta. Spikelet with glumes detached x8. Spikes 15 or more, oj 12 or fewer asceyid- § 2. ATHEROP6gON (Muhl.) Gray, ing 3. B. curtip£ndula (Michx.) Torr. Culms erect from short running root- stocks, 3-10 dm. high ; sheaths pubescent toward the summit; blades 1-3 dm. long, 3-5 mm. wide, flat or involute and setaceous toward the end, scabrous
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