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. 

 % (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. 91 — Timber, Jeffer- 

 son County, Wash. Known 

 only from the type collec- 

 tion. 



16. Glyceria grandis S. 

 Wats. American manna- 

 grass. (Fig. 148.) Culms 

 tufted, stout, 1 to 1.5 m tall; 



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



Figure 146 



-Glyceria elata. Plant, X 1; 

 (Hitchcock 2731, Calif.) 



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, 





