280 POACEiE. 



Valuable for pasture in the regions in which it is found. 



Colorado to Montana. 



8. A. GENicuLATus L. Sp. PI. 60 (1753). Floatijstg or 

 Water Foxtail. 



A perennial; culms procumbent at base, 30-50 cm. high. Up- 

 per sheaths loose, with blade 4-20 cm. long, 1 cm. wide or less. 

 Spike 2.5-5 cm. long, 9 mm. broad, obtuse, pale green. Spike- 

 lets 4 mm. long; empty glumes scarcely connate at base, silky- 

 ciliate, on the lateral and mid-nerves, obtuse; floral glume sliglitly 

 s'lorter than the emjDty glumes, its margins united one-third their 

 length ; the awn starting one-fourth of the way from the base and 

 projecting half its length. 



Massachusetts, Mann; Pennsylvania, Scribner for U. S. Dept. 

 Agricul. 225; Iowa, Hitclicock; Missouri, C. G. Comstock; 

 Montana, Williams. 



Wet meadows and ditches; found in Europe, northern Africa, 

 western Asia, Australia ; introduced into North America. . 



Var. fulvus (J. E. Smith) Scribn. Mem. Torr. Club, 5:38 

 (1894). A. fulviis Smith, Engl. Bot. t. U67 (1793). A. anstu- 

 latus Michx. Fl. Bor. Am. 1:43 (1803). A. genicuJatus aristula- 

 tus Torr. Fl. U. S. 1:97(1824). 



Blades of the upper leaves sometimes exceeding the spike. 

 Spikes 5-8 cm. long, 1 cm. or less broad. Spikelets two-thirds as 

 long as those of the species ; empty glumes slightly shorter than 

 tlie floral glume; awn starting very little below the middle of the 

 glume and scarcely projecting at the apex. 



Vermont, Pringle; Massachusetts, Beal 58; New York, Clarh 

 1682, Beal 60; Pennsylvania, Scrihner Zd^^ ; Michigan, Beal 59, 

 Clarh 689, Cooley, Auslin ; Minnesota, Holzinger 35; Utah, 

 Jbwe.s 1074; Arizona, Tourney 759; Oregon, Hoiuell ; California, 

 Parish, Palmer 234; Montana, WilUanis, AndersoJi 24; Wash- 

 ington, Suksdorf 1066; Wyoming, Buffum c 146. 



Wet places. New England to California. 



Var. robustus Vasey, Bull. Torr. Club, 15:13 (1886). 



Culms thick, sometimes branching below, 30-45 cm. high, 

 smooth. Sheaths loose, smooth, 8-12 cm. long, the lower longer 



