236 University of California Publications in Botany [VOL. 9 



4. Potentilla pseudosericea Rydb., Mem. N. Y. Bot. Gard., vol. 1, 



p. 98. 1898. 



Type locality. Not given except as "Nevada," but the collection 

 upon which the description is based is Shockley 592 from the White 

 Mountains, 13,000 feet, Inyo County, California. 



Range. Ranges of the Great Basin and in the Sierra Nevada ? 



Specimen examined. Olancha Peak, Tulare County, 12,000 feet, 

 Purpus 1865. 



5. Potentilla etomentosa Rydb., Bull. Torr. Bot. Club., vol. 24, 



p. 8. 1897. 



P. rigida Newberry, Pac. RE. Rep., vol. 6, p. 72. 1857, not of Nutt. 

 P. gracilis var. rigida Coville, Contr. Nat. Herb., vol. 4, p. 96. 1893. 



Type locality. Not given. 



Range. California and Nevada. 



Zone. Canadian ? 



Specimens examined. About Marlette Lake, east of Lake Tahoe, 

 2,460 m., C. F. Baker 1383 ; near Mineral King, Coville and Funston 

 1399; giant forest, Tulare County, Mrs. Brandegee, July, 1905; Suzy 

 Lake, Tahoe, dry ground, 7,800 feet, Smiley 166. 



This species is very near P. pulcherrima Lehm. and perhaps sub- 

 specific to that species. 



6. Potentilla concinnaeformis Rydb., Mem. Dept. Bot. Columbia 



Univ., vol. 2, p. 54. 1898. 



Type locality. "Arizona: J. G. Lemmon, no. 3294 (Mt. Agassiz, 

 10,000 ft.)." 



Range. Arizona and California. 



Specimen examined. Near head of Stanislaus River, Alpine 

 County, 7,800 feet, Hall and Chandler 4778. 



7. Potentilla gracilis Dougl. var. rigida Wats., Proc. Am. Acad., 



vol. 8, p. 557. 1873. 

 P. rigida Nutt., Jour. Acad. Phila., vol. 7, pt. 1, p. 20. 1834. 



Type locality. "Towards the sources of the Missouri, and as far 

 down as the old Arikaree village." 



Range. Southern Oregon to southern California. 



Zone. Arid Transition and Canadian. 



Specimens examined. Near Glen Alpine, Miss Lathrop, July 19, 

 1909 ; Half-Moon Lake, Tahoe, 7,760 feet, McGregor 80 ; Donner Lake, 



