102 



Festuceae 



Glyceria 



~3o 

 Map 137 



Festuca obtusa Spreng 



50 



Map 138 



Festuca paradoxa Desv. 



dp/ 50 



Map 139 



Glyceria striata (Lam.) Hitchc. 



6-383. GLYCERIA R. Br. Mannagrass 



Spikelets 2-8 mm long. 



Second glume about 1 mm long 1. G. striata. 



Second glume about 2 mm long. 

 Lemmas 1.4-2.5 mm long. 



Leaves 2-4 mm wide; panicles contracted (less than 5 cm wide) ; spikelets 3- or 



4-flowered. (See excluded species no. 44, p. 1025.) G. melicaria. 



Leaves mostly 5-15 mm wide; panicles open (more than 5 cm wide); spikelets 



4-7 flowered 2. G. grandis. 



Lemmas 3-3.5 mm long. 



Second glume 1-nerved; florets smooth and glossy; lemmas abruptly acute; 



anthers about 0.5 mm long 3. G. cayiadensis. 



Second glume 3- or 5-nerved; florets not smooth and glossy; lemmas obtuse; 



anthers 1-1.5 mm long 4. G. pallida. 



Spikelets 10-40 mm long. 



Lemmas obtuse, about equaling the palea. 



Spikelets 10-15 mm long; lemmas hispid only on the nerves; anthers about 1 mm 



long ; grain 1.5 mm long 5. G. borealis. 



Spikelets 15-30 mm long; lemmas hispid on the nerves and on the spaces between 



them; anthers 1-1.5 mm long; grain 2-2.5 mm long 6. G. septentrionalis. 



Lemmas acute; palea about 1.5 mm longer than the lemma 7. G. acutiflora. 



1. Glyceria striata (Lam.) Hitchc. (Proe. Biol. Soc. of Washington 41 : 

 157. 1928.) (Glyceria nervata ( Willd.) Trin. and Panicularia nervata 

 (Willd.) Ktze.) Fowl Mannagrass. Map 139. Frequent throughout the 

 state in wet soil in ditches, marshes, and wet woods, along streams, 

 and about ponds and swampy places. 



Newf. to B. C., southw to Fla., Tex., and n. Calif. 



2. Glyceria grandis Wats. (Panicularia grandis (Wats.) Nash.) 

 American Mannagrass. Map 140. This species grows in very wet places 

 or in shallow water in ponds or in ditches. I have found only a few plants 

 in three counties. 



P. E. I. to Alaska, southw. to Ohio, Tenn., Iowa, Nebr., N. Mex., and 

 e. Oreg. 



