290 



Fig. 284. PANICUliARIA CANADENSIS fMichx.) Kuntze, Rev, Gen. PI. 2: 

 783. 1891. {Brizacanadfnsi.'^^l\chx.F\.Bov. Am. 1 :71. 1803; Glyceria canadensis 

 Trin. Mem. Acad. St. Petersb. VI. Sci. Math. Phys. et Nat. 1 : 366. 1831.) RAT- 

 TLESNAKE-GRASS.— A stout native perennial 6-9 dm. (2°-30) high, with flat 

 leaves, and ample, nodding panicles of rather large spikelets. Sheaths 

 shorter than the internodes, the basal ones overlapping; ligule2mm. (1") long, 

 truncate; leaf-blades l.S-30 cm. (6'-12') long or more; 4-8 mm. (2"-4") wide, sca- 

 brous. Spikelets 5 to 12 flowered, flattened, turgid, 5-8 mm. (2i"-4") long; 

 empty glumes unequal, acute, 1-nerved; flowering glumes (c, </), 3-4 mm. 

 m"-2") long, obtuse or acute, ob.scurely 7-nerved. -Marshes and ditches, New- 

 foundland and Nova Scotia to Minnesota, south to New Jersey, Ohio, and 

 Kansas. June to August. 



