1921] Smiley: Flora of the Sierra Nevada of California 243 



12. IVESIA 



Flowers white; stamens 10-15 1. I. unguiculata 



Flowers yellow. 



Stamens 15-20 2. I. campestrls 



Stamens 5 (in I. pygmaea 5-10). 

 Foliage green. 



Leaflets usually unarmed. 



Flowers in a corymbiform cyme; stems somewhat viscid ..3. I. Gordoni 



Flowers in a capitate cyme; stems glabrous 4. I. lycopodioides 



Leaflets usually beset with prickles. 



Plants slightly viscid 5. I. pygmaea 



Plants very viscid 6. I. Shockleyi 



Foliage densely white-silky, the leaves vermiform 7. I. Mulrii 



1. Ivesia unguiculata Gray, Proc. Am. Acad., vol. 7, p. 339. 1868. 



Potentilla unguiculata Greene, Pitt., vol. 1, p. 105. 1887. 

 Potentilla oiliata Greene, Pitt., vol. 1, p. 103. 1887. 



HorkeUa unguiculata Eydb., Mem. Dept. Bot. Columbia Univ., vol. 2, p. 146. 

 1898. 



Type locality. — "Westfall's meadows, Yosemite Valley, lat. 8,000 

 feet, in wet places, Bolander." 



Range. — Sierra Nevada. 



Zone. — Canadian. 



Specimens ex-amined. — Westf all's meadows, 8,000 feet, Bolander 

 4964; between Peregoy's and Glacier Point, 7-8,000 feet, A. Gray in 

 1872; Hockett's meadows, Tulare County, Culbertson (B 4405) ; 

 Kaweah meadows, Tulare County, 9,300 feet, Purpus 5126a. 



Dr. Rydberg considers that the specimens collected by Lemmon 

 in Sierra County and cited by Brewer and Watson in the Bot. Calif., 

 vol. 1, p. 183 to represent a new species which is densely silvery white 

 rather than "somewhat silky, but not silvery- white, " the phrase with 

 which he describes the present species (/. ungiiicidata Gray) ; I have 

 had no opportunity to examine the Lemmon specimens and wish now 

 merely to call attention to Ivesia sericoleuca Ryb, (N. Am. FL, vol. 

 22, p. 284. 1908), a species said to be restricted to the Sierra Nevada. 



2. Ivesia campestris (M. E. Jones) Rydb., N. Am. FL, vol. 22, 



p. 285. 1908. 



Potentilla utaliensis var. campestris M. E. Jones, Proc. Calif. Acad. II, 



vol. 5, p. 679. 1895. 

 Hortclia mollis Eastwood, Bot. Gaz., vol. 41, p. 286. 1906. 



Type locality. — Whitney meadows, Tulare County. 

 Range. — Southern Sierra Nevada. 

 Zone. — Canadian. 



