1921] Smiley: Flora of the Sierra Nevada of California 309 



Range. — Northern Rocky Mountains of Montana and Wyoming, 

 southern Cascades, and Sierra Nevada. 



Zone. — Arctic-alpine. 



Specimens examined. — Mt. Rose, 10,800 feet. Heller 9863 ; summit 

 of Mt. Tallac, Miss H. Geiss, August, 1909; Mt. Tallac, 9,500 feet, 

 Abrams 4833 ; summit of ridge between Lake LeConte and Heather 

 Lake, 8,900 feet, Smiley 350a; summit near Ebbetts Pass, 9,000 feet, 

 Brewer 2070. 



This subspecies differs from the species in the smaller leaves, which 

 are somewhat viscid and imbricated along the short stems. It is quite 

 similar to P. elegans Greene, a doubtfully distinct species of the Cas- 

 cades of Washington, 



3. Polemonium eximium Greene, Pitt., vol. 3, p. 305. 1898. 



Type locality. — "Mt. Conness." 



Range. — Sierra Nevada. 



Zone. — Arctic-alpine. 



Specimens examined. — Mt. Stanford (Castle Peak), Lemmon (this 

 station very doubtful, since no other collections kno^vn from north 

 of the Yosemite region) ; Mt. Dana, 13,050 feet. Hall and Babcock 

 3603 ; Chesnut and Drew, July 17, 1889 ; at 13,000 feet, Smiley 733 ; 

 Mt. Lyell, 13,000 feet, R. E. Gibbs 1746; near Mt. Goddard, 12,000 

 feet, Brewer 1737; Mt. Goddard, "at the very summit," 13,550 feet, 

 Hall and Chandler 666; summit of Farewell Gap, Tulare County, 

 Dudley 1119; Mt. Whitney, 13,800 feet, Culbertson (B4542). 



This species is the P. confertum of the Bot. Calif, (vol. 1, p. 500), 

 but seems quite distinct from that Rocky Mountain alpine species. 



Navarretia Breweri (Graj-) Greene (Pitt., vol. 1, p. 137. 1887), 

 described from "Sierra Nevada, at Ebbett's and Amador Pass, alt. 

 8,000 feet," should be mentioned as likely to be seen anj^where in the 

 Canadian zone on dry sand slopes or rocky places in spite of being 

 essentially an Upper Sonoran or Transition species. 



49. HYDROPHYLLACEAE (Waterleaf Family) 



Leaves all radical; peduncles 1-flowered 1. Hesperochiron 



Leaves both cauline and radical; flowers clustered (except in No. 4;. 



Styles 2, distinct to the base 2. Nama 



Style 2-cleft (united at least for over half its length). 



Leaves (in ours) all opposite, delicate annuals 3. Nemophila 



Leaves not all opposite, nearly all alternate. 



Flowers in pedunculate heads or umbels; ovary and capsule strictly 



1-celled; stamens and style long exserted 4. Hydrophyllum 



Flowers in scorpoid cymes (in high mountain dwarfs sometimes so dense 

 as to appear capitate) ; stamens and style shorter 5. Phacelia 



