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Fig. 569. PaniculariaborealisNash, Bull. Torr. Bot. Club, 24 : 

 348. 1897. Northern Manna-grass. — A rather slender, smooth 

 perennial 4 to 15 dm. high, with flat leaves and narrow panicles 

 12 to 40 cm. long. Spikelets (a) 10 to 18 mm. long, 7- to 13-flowered 

 with thiu, unequal empty glumes, and obtuse flowering glumes 

 which are hispidulous along the nerves and 4 to 5 mm. long. — 

 Margins of streams and ponds, New England and New York west- 

 ward to Washington and California. June-September. 

 K819— No. 17 18 



