274 



Fig. 256. Catabrosa aquatica (L.) Beauv. ; Britton and 

 Brown, 111. FL, 1 : 194. Water Whorl-grass. — A smooth, soft 

 perennial, with creeping or ascending culms 2 to 6 dm. long, flat 

 leaves and open panicles 5 to 20 cm. long, the spreading branches 

 in whorls. — In swales and along brooks, often in shallow water, 

 Newfoundland and Labrador, to Quebec and Alaska, south to Ne- 

 braska, Colorado, and Utah. [Europe and Asia.] June-August. 



