MANUAL OF THE GRASSES OF THE UNITED STATES 



85 



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. 

 % —Shallow water and wet places, 

 Quebec to Minnesota, south to Geor- 

 gia and eastern Texas. 



Figure 91.— Glyceria septentrionalis. Panicle, X 1; 

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



6. Glyceria fluitans (L.) R. Br. 



Mannagrass. (Fig. 92.) 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 lemma. % (Panicularia brachy- 

 phylla Nash.) — Shallow water, New- 

 foundland to Quebec and New York; 

 South Dakota; Eurasia. 



7. Glyceria occidentals (Piper) J. 

 C Nels. (Fig. 93.) Culms flaccid, 60 

 to 100 cm. tall; blades 3 to 12 mm. 

 wide, smooth beneath, somewhat sca- 

 brous on the upper surface; panicle 

 loose, spreading at anthesis, 30 to 50 



i! 



Figure 92. — Glyceria fluitans. Panicle, X 1; floret, 

 X 10. (Mcintosh 1076, S. Dak.) 



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, some- 

 times slightly exceeding it. % — 

 Marshes, shallow water, and wet 

 places, Idaho to British Columbia, 



