86 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Specimens examined: Circle City, Osgood in 1899; Fort Yukon, Georgeson 26; Lake 

 Lindeman, Dawson in 1887. 



In habit this species is related to Agropyron tenerumY&sey, but it is distinguished by 

 its pubescent nodes, peculiarly truncate glumes, and hispid lemmas. Agropyron 

 parishii Scribn. & Smith, from southern California, is the only other American species 

 in this genus having pubescent nodes. 



4. Agropyron tenerum Vasey, Bot. Gaz. 10: 258. 1885. Slender wheat-grass. 

 An erect, cespitose, glabrous perennial, 00 to 90 cm. high, with narrow, flat leaves 



and slender spikes, 5 to 15 cm. long; glumes lanceolate; lemmas 8 to 10 mm. long, 

 tipped with a stout, straight awn 1 to 4 mm. in length. 



In dry soil, Cook Inlet and the upper Yukon, thence to California, New Mexico, and 

 Minnesota. 



Specimens examined: Kenai, Piper 4703, 4705; opposite Port Axel (Kachemak 

 Bay?), Piper 4704; it is reported « as collected at Dawson by R. S. Williams in 1899. 



5. Agropyron violaceum (Hornem.) Lange, Consp. Fl. Groenland. 154. 1880. 

 Triticum violaceum Hornem. Fl. Dan. 12: pi. 2044. 1832. 



An erect, cespitose, glabrous perennial, with rather short, flat leaves and compara- 

 tively stout purplish spikes, 2 to 6 cm. long; glumes 8 to 12 mm. long; lemmas gla- 

 brous or nearly so, acuminate or short awn-pointed. 



Usually in sandy soil, southeastern Alaska to Labrador, and southward to Colorado; 

 also in northern Europe and Asia. 



We have seen no specimens of this grass from Alaska; it is, however, reported from 

 the Chilkat region by F. Kurtz. b 



5a. Agropyron violaceum andinum Scribn . & Smith, U. S. Dept. Agr. Div. Agrost. 

 Hull. 4: 30. 1897. 



A low form differing from the species by its somewhat decumbent habit, shorter 

 spikes, and awned lemmas, the awn equaling or exceeding the lemma. 



Southeastern Alaska, southward to the high mountains of Colorado. 



Specimen examined: hake Lindeman, Dawson 88, in part. 



5b. Agropyron violaceum. latiglume Scribn. & Smith, U. S. Dept. Agr. Div. 

 Agrost. Bull. 4: 30. 1897. 



A low form, 10 to 15 cm. high, with thicker spikes and broader, pubescent lemmas 

 and often pubescent leaves. 



Yakutat Bay and southeastern Alaska, south to Montana and Labrador; also in 

 Grinnell Land. 



Specimens examined: Lake Lindeman, Dawson 86; Hidden Glacier, Yakutat Bay, 

 Coville & Kearney 971, 983a. 



G. Agropyron caninurn (L.) Beauv. Ess. Agrost. 102. 1812. 



Triticum caninurn L. Sp. PI. 86. 1753. 



Elymus caninus L. Fl. Suec. ed. 2. 112. 1755. 



An erect, glabrous perennial, 30 to 90 cm. high, with flat leaves and awned spike- 

 lets; spikes 7 to 20 cm. long, glumes about 10 mm. long, tapering into an awn usually 

 2 to 6 mm. long; lemmas about 8 mm. long, acuminate into an awn 1 to 2 cm. in length. 



In waste grounds in the upper Yukon valley, east to New Brunswick and south to 

 Colorado and Tennessee; also in Europe and Asia. 



Specimen examined: Fort Yukon, Bates in 1889. 



7. Agropyron richardsonii Schrad. in Trin. Linnaea 12: 467. 1838. 

 Triticum richardsonii Trin. loc. cit. 

 Agropyron unilateral Cassidy, Bull. Colo. Exp. Sta. 12: 63. 1890, not Beauv. 1812. 



a Nash, Bull. N. Y. Bot. Gard. 2: 158. 1901. 

 &Bot. Jahrb. Engler 19: 424. 1894. 



