98 University of California Publications in Botany [Vol. 9 



9. AGROPYRON 



Ehachis continuous, not separating into joints. 



Lemma awnless or merely mucronate 1. A. tenerum 



Lemma awned 2. A. Gmelini var. Pringlei 



Rhachis jointed and separating when the grain is mature 3. A. Scribneri 



1. Agropyron tenerum Vasey, Bot. Gaz., vol. 10, p. 258. 1885. 

 Type locality.— Not given, the collections upon which the specific 



description is based from Fort Garland, Colorado. 



Range. — Subarctic America south to New England, New Mexico, 

 and California. 



Zone. — Canadian, at least as to the specimens here considered. 



Specimens ex-amined. — Angora moraine, Tahoe, 7,300 feet. Smiley 

 8 ; Silver Mountain, 8-9,000 feet. Brewer 2068 ; Bloody Canon, 9,500 

 feet, R. A. Ware 2714c. 



2. Agropyron Gmelini var. Pringlei Seribn. and Smith, U. S. 



Dept. Agri., Div. Agrost. Bull. 4, p. 31. 1897. 



Type locality. — "Sierra Nevada Mountains above Summit Val- 

 ley." 



Ea?i//e.— Sierra Nevada eastward to Montana and Colorado. 



Zone. — Hudsonian and Arctic-alpine. 



Specimens examined. — Sierra Nevada above Summit Valley, 9,500 

 feet, Pringle, September 23, 1882 ; slope east side of LeConte Lake, 

 Tahoe, 8,700 feet, Smiley 349 ; Carson Pass, 8,000 feet, Bolander 2118 ; 

 Mt. Hoffman, Mariposa County, Congdon, August 20, 1890; Pyramid 

 Peak, west side, 9,800 feet. Hall and Chandler 4718; Kaiser Crest, 

 Fresno County, 9,100 feet. Smiley 622 ; rocky slopes along Little Kern 

 River, 11-12,000 feet, Purpus 5515. 



3. Agropjnron Scribneri Vasey, Bull., Torr. Bot. Club. vol. 10, 



p. 128. 1883. 



Type locality. — Montana. 



Range. — California east to Montana and south to New Mexico. 



Zone. — Arctic-alpine. 



No specimen of this grass has been seen from California ; it is here 

 admitted only because reported by Hitchcock (Jepson, I.e., p. 132) 

 to have been collected on Mt. Dana by Congdon in 1898. 



