C36 POAtE.E. 



mm. lon<,% witl- 3 strong nerves, short-awned, second U mm. long,, 

 witli very strong nerves, awn 5 mm. long; llonil glume «-!» mm. 

 long, witli 5 ol)scure nerves, awn about Ji mm. l..ng; palea shorter 

 than its glume, with 2 ciliate nerves. Grain adlierent. 



IMonlana, Scribncr 4:i2, the type; Colora.lo, (Wn,s-/V///. I ^'.st//; 

 Iowa. llUchrork; northerti ^lichigan, Heal 



The speeilic name HnihUcrah had been used before Cassidy ap- 

 plied it to this species. 



2. A. dasystachyum (Hook.) Scribn. Bull. lorr. Club, 10: .b 

 (1SS;3); Vasev. Grasses U. S., Special Kej-t. U. S. Dept. Agr. 

 Js'o. (;;5, 45 (IH8;5). TritirumrepenxS'AW ,/(is//s/achi/>nii llcolv M. 

 Bor. Am. :.': 254 (1840), teste A. Gray. T. <las,/,(,>r/n/H>H A. Gray, 



Man. Kd. 1, ('.0-> (1S48). 



A smootli glauous perennial, GO-90 em. high. Avitli slender 

 rootstocks having internudes 3-4 em. long. T.eaves of ster.lo 

 shoots ,iunu>rous, bl.des involute, ;)0-40 cm. long, 2-4 mm. wide, 

 those of the culm 3-4 in number, siieaths nearly as long as the inter- 

 nodes; ligule a mere ring; bhules G-12 cm. long. Spike exserted, 

 14-20 cm. long, Joints of ra.diiUa 1 cm. long, or near the base longer. 

 Spikelets muTOW, 2 or more cm. long, 5-9-llowered; empty glumes 

 smooth or puberuleiit, lirst T mm. long, 3-nerved, second 10-12 mm. 

 long, 5-nerved; ilorul glume U mm. long, soft-hairy throughout, 

 awnles ; or with short awns, margins scarious. Abr rnial or thrifty 

 plants bear branching spikes. 



Jklichigan, n-heeler 15G, 157, 158, Seal 158, 159. 



Shores of the Great Lakes, British America and the Kocky 



Mountains. 



3. A. repens (L.) Beauv. Agrost. 102 (1812). Quick-, Couch-, 

 Quack-, Twjtcii-Guass. Trillcmn repem L. Sp. Tl. 8G (1753). 



A smooth pale green or glaucous perennial, very variable, 

 30-120 cm. high, with the internodes of the vootstock 1-1.5 em. 

 long Liy-ulc very short; blades Hat, scabrous, 5-10 mm. wide, the 

 upper 10-20 cm. long. Spike G-20 cm. long, c/ect or bending, 

 mostlv rigid, joint of rachis 5-15 mm. long. Spikelets 10-20 mm. 

 long,'2-8-llowered, florets at the middle of the spike overlapping 

 for three-fourths of tlieir length 01 more; empty glumes each un- 



