108 MINNESOTA BOTANICAL STUDIES. 



Minnesota: Frequent throughout the northern and central 

 parts of the state; forest openings, hillsides and meadows. 



Minn, specimens in herb.: Bailey Jf9J^, Agate Bay; Sheldon 

 2933, Milaca; Sheldon 3299, Mille Lacs county; Mac3I. and Sheld. 

 2, Brainerd. 



Agropyronviolaceum (Hornem.) Lange, forma cauinoides 

 n. f. Awned Wheat Orass. 



Stems 5 to 8 dm. in length; leaves 1, 5 to 3 dm. in length; 

 sheaths smooth, about the same length as the blades; blades 3 to 

 6 mm. broad, involute or almost flat; inflorescence 1 to 2 dm. in 

 length, cylindrical, dense; spikelets 10 to 20 mm. in length, 

 somewhat pale or at least but slightly purple tinged; empty 

 glumes 8 to 16 mm. in length, 3 to 5 nerved, with awns 2 to 10 

 mm. in length; floiuering glumes armed with long, somewhat 

 curved or spreading awns 10 to 25 mm. in length. 



The large size, pale spikes and long awns of this forma give 

 it much the general appearance of A. caninum (Linn. ) Beauv. 

 and still more of forma violacescens, supra. 



North America: N. B., White Mts., N. H., Penn., Lake 

 Superior, Minn., Iowa and W. to the Rocky Mts. 



Minnesota: Infrequent; hillsides, embankments and forest 

 openings. 



Minn, specimen in herb. : MacM. and Sheld 84, Brainerd. 



Agropyron tenerum Vasey. Bot. Gaz. 10:258. 1885. 

 Wheat Orass. 



Perennial, growing in tufts, without root-stocks; stems 5 to 10 

 dm. in length, erect; leaves 1 to 3 dm. in length; sheaths striate, 

 nearly smooth; blades 2 to 4 or 6 mm. broad, flat or somewhat 

 involute; inflorescence 1 to 2 dm. in length, virgate, narrow, with 

 the spikelets about 1 cm. apart or sometimes closer; spikelets 3 

 to 5 flowered; empty glumes 9 to 12 mm. in length, somewhat 

 scabrous, rigid, lanceolate, acute or awn pointed, 5 nerved; 

 floiuering glumes 8 to 10 mm. in length, lanceolate, acute, rounded 

 on the back, smooth or nearly so, conspicuously 5 nerved at the 

 tips, with straight awns 1 to 5 or 10 mm. in length. 



North America: Man. to Edmonton, N. W. T. and Rocky 

 Mts.; S. through Minn., Dak., Neb. and Kan.; W. to Colo, and 

 Utah. 



Minnesota: Red river valley and southward along the west- 

 ern border of the state; dry slopes and meadows. 



