MANUAL OF THE GRASSES OF THE UNITED STATES 



87 



flui- 



Br. 



(Fig. 



Figure 131.— Glyceria septentrionalis 



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



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.) — Shallow 

 water and wet 

 places, .Quebec to 

 Minnesota, south to 

 South Carolina and 

 eastern Texas (fig. 

 132). 



6. Glyceria 

 tans (L.) R 

 Mannagrass. 

 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 

 cle > lemma. % (Panic- 

 ularia jluitans 

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

 Newfoundland to Quebec and New York; South 

 Dakota; Eurasia. 



7. Glyceria occidentalis (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, and wet places, Idaho to British Columbia and northern Cali- 

 fornia (fig. 135). The seeds are used for food by the Indians. 



Figure 132.— Distribution 

 Glyceria septentrionalis. 



Figure 133.— Glyceria 

 fluitans. Panicle, X 1; 

 floret. X 10. (Mcin- 

 tosh 1076, S.Dak.) 



