1921] Smiley: Flora of the Sierra Nevada of California 161 



conform to the concept of an ecological species, whose characters are 

 directlj' dependent upon the environment. E. nudum Dougl. is one 

 of the commonest Eriogonums and it is easily possible in any large 

 collection to so arrange the suites that undoubted representatives of 

 the type are seen to pass by small differences into these high mountain 

 forms. 



5. Eriogonum ovalifolium Nutt., Jour. Acad. Philad., vol. 7, p. 50. 

 1834. 



Type locality. — "Sources of the Missouri." 



Range. — British Columbia and Alberta south to the Sierra Nevada 

 and along the Rocky Mountains to New Mexico. 



Zone. — Upper Sonoran to Hudsonian in the type form. 



Specimens examined. — Mt. Tallac, 9,500 feet, Abrams 4829 ; sum- 

 mit of Mono Pass, 10,700 feet, R. A. Ware 2628c ; Silver Mountain, 

 Hooker and Gray in 1877 ; Mt. Dana, rockfield on the northwest slope, 

 12,000 feet. Smiley 727 ; Mt. Whitney, rocky places, Purpus, August, 

 1895. 



5a. Eriogonum ovalifolium var. nivale Jones, Contr. W. Coast 

 Bot., vol. 11, p. 8. 1903. 



E. nivale Canby, Contr. Nat. Herb., vol. 4, p. 187. 1893. 



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

 meadows. Sierra Nevada, Tulare County, California." 



Range. — High Sierra Nevada. 



Zone. — Arctic-alpine. 



Specimens eocmnined. — Mt. Whitney, 12,000 feet, Rothrock 390 ; 

 Siberian Pass, Tulare County, Hall and Babcock 5481 ; ascent of 

 Mt. Kaweah, Dudley 211; Mt. Dana, Chesnut and Drew, July 17, 

 1889 ; Olancha Peak, Tulare County, 11-12,000 feet, Purpus 2012. 



■5b. Eriogonum ovalifolium var. vineum Jepson, I.e., p. 423. 



E. vineum Small, Biill. Torr. Bot. Qub, vol. 25, p. 45. 1898. 



Type locality. — "Mountains of Oregon and California"; speci- 

 mens cited from the San Bernardino Mountains of southern California, 

 and from the Powder River Mountains of eastern Oregon. 



Range. — Oregon to southern California. 



Specimens examined. — Dick's Peak, Tahoe, 9,950 feet, Smiley 430; 

 Castle Peak, 9,000 feet. Heller 7081. 



