176 University of California Publications in Botany [VOL. 9 



Specimens examined. Mt. Rose, 9,700 feet, Heller 9912; Sonora 

 Pass, 9,000 feet, and top of Silver Mountain, 11,000 feet, Brewer 1879 ; 

 Mt. Goddard, 11,500 feet, Hall and Chandler 670 ; mountains above 

 Big Tree Grove (Mariposa Grove), Bolander 4976; Siberian Pass, 

 Tulare County, 3,320 m., Hall and Babcock 5479; Kaiser Peak, 10,200 

 feet, forming mats, Smiley 643; Harrison's Pass, Tulare County, about 

 14,000 feet, Eastwood, July 1-13, 1899; Alta meadows, 10,000 feet, 

 G. B. Grant 5318 ; Mineral King, Brandegee, July 28, 1892 ; gravelly 

 mountain slopes near Little Kern River, Tulare County, Purpus 5253. 



The type form A. Nuttallii Pax (Engler's Jahrb., vol. 18, p. 30. 

 1893) is only known in California from the mountains of the Shasta- 

 Siskiyou region and extends north and east to Oregon and Wyoming. 

 The var. gracilis differs by the sepals being awned or mucronate and 

 by the green, not glaucous, color. 



Var. gracilipes Jones (Proc. Calif. Acad. II, vol. 5, p. 626. 1895), 

 which may not be distinct from the variety above cited, but is known 

 to me only by the description, was described from Utah specimens 

 collected on Brigham Peak of the Wasatch above timber line. From 

 character, it differs in the leaves being abruptly pointed, not acuminate 

 as in the type and in var. gracilis. Professor Jones cites specimens 

 for the var. gracilipes from the Northwest and Wyoming, none from 

 the Californian region. 



2. Arenaria compacta Coville, Proc. Biol. Soc. Wash., vol. 7, p. 67. 



1892. 



Type locality. "At timber-line on a divide northwest of Whitney 

 meadows, Sierra Nevada, Tulare County, California." No. 1653, 

 Death Valley Expedition. 



Range. Southern Sierra Nevada. 



Zone. Arctic-alpine, or rarely in the Hudsonian. 



Specimens examined. Mt. Dana, Theo. Labouchere, July, 1915; 

 near Whitney meadows, Coville and Funston 1653. 



3. Arenaria congesta Nutt., in T. and G., FL, vol. 1, p. 178. 1838. 



Type locality. "Shady hills in the Rocky Mountain range, about 

 Bear River of the Lake of Timpanagos. " 



Range. Pacific Coast south of Washington and east to Colorado 

 and Wyoming. 



Zone. Arid Transition to Hudsonian. 



Specimens examined. Sierra County, Lemmon in 1875; Summit, 

 Bolander 1873; Cisco, Dr. Kellogg, June, 1870; Plumas County, 



