402 MISC. PUBLICATION 42 3, U. S. DEPT. OF AGRICULTURE 



staff, Coconino County, type from Oak Creek Canyon {Lemmon in 

 1884). It differs from typical P. crinita in the more erect, stiff er 

 stems, leaflets toothed only at or very near the apex, and petals 

 usually not surpassing the sepals. 



14. Potentilla pulcherrima Lehm., Nov. Stirp. Pugill. 2: 10. 1830. 

 Apache County to Coconino County, 8,000 to 11,300 feet, open 



coniferous forests, July and August. Canada to New Mexico and 

 northern Arizona. 



This species apparently intergrades with P. hippiana. 



15. Potentilla hippiana Lehm., Nov. Stirp. Pugill. 2: 7. 1830. 

 Apache, Navajo, and Coconino Counties, and in the Pinaleno 



Mountains (Graham County), 7,500 to 11,500 feet, grassy meadows 

 and open coniferous forests, June to September. South Dakota to 

 Alberta, south to New Mexico and Arizona. 



The typical form has the leaves almost equally sericeous on both 

 faces. In var. diffusa (A. Gray) Lehm. (P. propinqua Rydb.), 

 which has much the same distribution in Arizona as the typical form 

 and is at least equally abundant, the upper surface of the leaves is 

 green and much less sericeous than the lower surface. 



16. Potentilla diversifolia Lehm., Nov. Stirp. Pugill. 2: 9. 1830. 



Potentilla glaucophylla Lehm., Delect. Sem. Hort. Hamburg. 

 7. 1836. 



Kaibab Plateau and San Francisco Peaks (Coconino County), 

 White Mountains (Apache County), perhaps also in the Pinaleno 

 Mountains (Graham County), 9,000 to 12,000 feet, July to September. 

 Canada to New Mexico, Arizona, and California. 



The Arizona specimens are of the sparsely pubescent or glabrate 

 form (P. glaucophylla) . 



*17. Potentilla pectinisecta Rydb., Torrey Bot. Club Bui. 24: 7. 

 1897. 

 Collected, possibly in extreme northern Arizona, by E. Palmer in 

 1877 (No. 145). Wyoming, Utah, and (?) northern Arizona. 



18. Potentilla concinna Richards., Bot. App. Frankl. Jour. ed. 2, 20. 



1823. 



Betatakin, Navajo County (Wetherill 76), San Francisco Peaks, 

 Coconino County, 11,000 to 12,000 feet (Lemmon in 1884, Whiting 

 756, Little 4613, 4650). 



Wetherill's and Lemmon's specimens probably belong to P. con- 

 cinnaeformis Rydb., with leaflets merely strigose above. Whiting's 

 and Little's specimens seem to be P. modesta Rydb., with leaflets 

 densely sericeous above. It is doubtful that these forms are specifi- 

 cally distinct from P. concinna, which ranges from Canada to Colorado 

 and Utah (probably also to New Mexico and Arizona). 



19. Potentilla wheeled S. Wats., Amer. Acad. Arts and Sci. Proc. 



11:148. 1876. 



Potentilla viscidula Rydb., North Amer. Fl. 22: 327. 1908. 



Huachuca Mountains (Cochise County), Santa Rita Mountains 

 (Pima County), 8,000 feet and probably higher, rock crevices, May, 





