MANUAL OF THE GRASSES OF THE UNITED STATES 



87 



Figure 131.— Glyceria septentrionalis 



X 1; floret, X 10. (Deam 3184, Ind.) 



II : Jj ] 



cm long, 6- to 12-flowered, the florets rather loosely imbricate; glumes 

 2 to 3 and 3 to 4 mm long; lemmas green or pale, about 4 mm long, 

 narrowed only slightly at the summit, scaberulous, 

 the paleas usually exceeding them. % (Panicu- 



laria septentrionalis 



Bickn. ) — S hallow 



water and wet 



places, Quebec to 



Minnesota, south to 



South Carolina and 



eastern Texas (fig. 



132). 

 6. Glyceria flui- 



tans (L.) R. Br. 



Mannagrass. (Fig. 



133.) Resembling 



G. septentrionalis in 



habit ; first glume 



usually only one- 

 third as long as the 



first lemma; lemmas 



scaberulous, the 



nerves distinct but 



not raised promi- 

 nently above the 



tissue of the inter- 

 nerves; tip of palea 



usually exceeding its 



Panicle, } emma _ Q[ (Panic- 



ularia jluitans 

 Kuntze; P. brachyphylla Nash.) — Shallow water, 

 Newfoundland to Quebec and New York; South 

 Dakota; Eurasia. 



7. Glyceria occidental (Piper) J. C. Nels. (Fig. 

 134.) Culms flaccid, 60 to 100 cm tall; blades 3 to 

 12 mm wide, smooth beneath, somewhat scabrous 

 on the upper surface; panicle loose, spreading at 



an thesis, 30 to 50 cm long; 

 spikelets, 1.5 to 2 cm long; 

 first glume mostly about 2 

 mm long; lemmas usually 

 tinged with purple near the 

 tip, 4 to 6 mm long, rather 

 strongly scabrous, 7- to 9- 

 nerved, the nerves prominent, 

 raised above the tissue of the 

 internerves; palea about as long as its lemma, sometimes slightly 

 exceeding it. % (Panicularia occidentalis Piper.) — Marshes, shallow 

 water, aud wet places, Idaho to British Columbia and northern Cali- 

 fornia (fig. 135). The seeds are used for food b}^ the Indians. 



Figure 132.— Distribution 

 Glyceria septentrionalis. 



of 



Figure 133.— Gl yceri a 

 fluitans. Panicle, X 1; 

 floret, X 10. (Mcin- 

 tosh 1076, S.Dak.) 



