342 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 



Range: Alaska to Labrador, southward to California, New Jersey, and New Mexico. 

 Europe. Asia. 



Specimens ex.\mined: Cascade Mountains to Colville, Lyall in I860; without locaHty, 

 Vasey 316; Mission, Kreager 490; Wenache Mountains, Cotton 1651 J. 



Zonal DisTRiBrrioN: Canadian? 



la. Dasiphora fruticosa tenuifolia (Willd.) Rydberg, Mon. N. A. Pot. ISO. 1898. 



Poteniilla tenuifolia Willd.; Schleciit. Mag. Ges. Naturf. Freunde Berlin 7: 285. 1813. 



Potentilla fruticosa tenuifolia Lehm. Mon(^. Pot. 20 1820. 



Type i>ocality: "Aus Sibirien." 



Range: Same as of the preceding. 



Specimens examined: Olympic Mountains, Grant in 1889; Mount Rainier, Pi-per 1997; 

 Wenache Mountains, Elmer 462; Horseshoe Basin, Lake dh Bull 519. 



Zonal distribution: Hudsonian. 



DRYMOCALLIS. 



Style filifonn, more than twice as long as the akenes 1 . D. rhomboidea. 



Style niiform, less than twice as long as the akenes. 

 Flowers cream-color. 



Stems 20 to 50 cm. high ; alpine plant ^ 2. D. jKevdonijKsfris. 



Stems 30 to 100 cm. high ; lowland plant 3. D. convallaria. 



Flowers yellow. 



Sepals broadly ovate 7. D. wrangeliana. 



Sepals lanceolate to ovate. 



Herbage nearly glabrous 6. D. glabrata. 



Herbage very glandular. 



Petals much larger than the sepals 4. D. vaiida. 



Petals scarcely lai^er than the sepals 5. D. glandulosa. 



1. Drjrmocallis rhomboidea Rydberg, Mon. N. A. Pot. 203. 1898. 

 Potentilla rhomboidea Rydberg, Bull. Torr. Club 23: 248. 1896. 

 Type locality: Nevada. Collected by Watson. 



Range: Washington to Montana, Nevada, and Oregon. 

 Specimens examined: Mount Adams, Saisdor/ 119; F lelt IS32. 



2. Drymocallis pseudorupestris Rydberg, Mon. N. A. Pot. 194. 1898. 

 Potentilla psendorupestris Rydberg, Bull. Torr. Club 24: 250. 1897. 



Poteniilla glandulosa nevadensis S. Wats, in Brewer & Wats. Bot. Cal. 1: 178. 1876, not 

 P. nevadensis Boiss. 



Type locality : Little Belt Mountains, Montana. 



Range: Alberta to Washington and California. 



Specimens examined: Klickitat County, iSwisdor/" in 1885. 



This supposed species seems to me quite identical with the Old World Potentilla rupestris L. 



3. Drymocallis convallaria Rydberg, Mon. N. A. Pot. 193. 1898. 

 Potentilla convallaria Rydberg, Bull. Torr. Club 24: 249. 1897. 

 Type locality: Bozeman, Montana. 



Range: Washington to Wyoming and Assiniboia. 



Specimens examined: Conconully, Whiled 1312; Rattlesnake Mountains, Cotton 470; 

 Loomis, Elmer 565; Pullman, Piper 1528; Elmer 820. 



Zonal distribution: Arid transition. 



This species is very closely allied to the eastern D. arguta, to which it has often been 

 referred. 



4. Drymocallis vaiida (Greene). 

 Potentilla vaiida Greene, Pittonia 3 : 20. 1896. 



