1921] Snviley: Flora of the Sierra Nevada of California 163 



8. Eriogonum umbellatum Torr., Ann. N. Y. Lye, Nat. Hist., vol. 



2, p. 241. 1828. 



E. latum Small, in Eydb., Mem. N. Y. Bot. Gard., vol. 1, p. 121. 1900. 

 E. reclinatum Greene, Pitt., vol. 5, p. 67. 1902, 



Type loeality. — "Near the Koekj^ Mountains." 



Range. — Western United States. 



Zone. — Arid Transition to Hudsonian. 



Specimens examined. — Pyramid Peak, 9,400 feet. Hall and Chand- 

 ler 4735 ; Donner Pass, Heller 7023 ; Silver Lake, 8,000 feet, Hansen 

 188 ; Mt. Bradley, Miss Lathrop, July 25, 1903 .; Lake Valley, Tahoe, 

 6,500 feet, Abrams 4811 ; Mt. Tallac, low mats, 9,100 feet. Smiley 232 ; 

 Mt. Rose, 9,300 feet. Heller 10,349; about Marlette Lake, east of 

 Tahoe, 2,460 m.. Baker 1291 ; high ridge above Donner Pass, 8,500 feet. 

 Heller, August 17, 1903 ; Lake Tenaya, Yosemite, 8,600 feet. Smiley 

 686 ; Angora Peak, Tahoe, 7,600 feet. Smiley 4 ; Shuteye Mountain, 

 Madera County, 7,900 feet. Smiley 566 ; Siberian Pass, Tulare County, 

 Hall and Babcock 5477, this the form of the highest mountains. 



Most of the above cited specimens conform to the description of 

 E. reclinatum, distinguished from the typical form by the caudex 

 branches more widely spreading but connected with the normal type 

 by all degrees of intergradation, 



8a. Eriogonum umbellatum Torr. var. monocephalum T. and G., 

 Proc. Am. Acad., vol. 8, p. 160. 1870. 

 E. Tohnieanum Hook., Fl. Bor. Am., vol, 2, p. 134. 1838. 



Type locality. — "Banks of the Walla Walla River, among Arte- 

 misia." 



Range. — Washington to California on the east side of the Cascades- 

 Sierra. 



Zone. — Hudsonian as to the specimen cited. 



Specimen exa/mined. — Dry soil at Sonora Pass, 10,000 feet. Brewer 

 1895. 



This variety differs from the type in having the umbel reduced 

 to a single ray. Jepson {I.e., p. 425) cites collections from the North 

 Coast ranges. 



9. Eriogonum Torreyanum Gray, in T. and G., Proc. Am. Acad, 



vol. 8, p. 158. 1870. 

 Type locality. — "California, on a high mountain of the Sierra 

 Nevada near Donner Pass." 



Range. — Sierra Nevada in the Tahoe region. 

 Zone. — Transition mainly, entering the Canadian. 



