113 



Fig. 409. Zizania aquatica Linn. Sp. PI. 001. Wild Rice 

 "Keeds."— A stout, erect, aquatic annual 9 to 30 dm. high, with 

 broad, Hat leavi-s and large panicles 30 to 60 cm. long. Stami- 

 nate spikelets (c) 6 to 12 mm. long, awuless; tlie pistillate 

 spikelets (a) 8 to 24 mm. long, the outer one bearing an awn 24 to 

 48 mm. long. Grain linear, 10 to 16 mm. long.— Swamps and 

 shallow margins of sluggish streams and rivers, New Brunswick 

 to Manitoba, southward to Florida and Texas. June-October. 

 19819— No. 17 8 



