92 



MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



the branches spreading, the lower often reflexed; spikelets 6- to 8- 



flowered, 3 to 5 mm long; 

 glumes and lemmas a little 

 longer than in 



G. striata. 



91 (Panicularia elata Nash; 

 P. nervata elata Piper.) Wet 

 meadows, springs, and shady 

 moist woods, Montana to 

 British Columbia, south in 

 the mountains to New Mexico 

 and southern California. 



15. Glyceria otisii Hitchc. 

 (Fig. 147.) Resembling G. 

 elata; spikelets broader, ob- 

 long, with on the average 

 more florets, the glumes 

 broader; lemmas broader, 

 especially at the summit, 

 very scabrous, the prominent 

 hyaline tip contrasting with 

 the purple zone just below, 

 the lower part of the lemma 

 green. 2J. Timber, Jeffer- 

 son County, Wash. Known 

 only from the type collec- 

 tion. 



16. Glyceria grandis S. 

 Wats. AMERICAN MANNA- 

 FIGURE 146. Glyceria elata. Plant, X 1; floret, X 10. GRASS. (Fig. 148.) Culms 



tufted, stout, 1 to 1.5m tall; 

 blades flat, 6 to 12 mm wide; panicle large, very compound, 20 to 40 



FIGURE 147. Glyceria otisii. Panicle, X 1; floret, X 10. (Type.) 



cm long, open, nodding at summit ; spikelets 4- to 7-flowered, 5 to 6 

 mm long, glumes whitish, about 1.5 and 2 mm long; lemmas purplish, 



