400 MISC. PUBLICATION 42 3, TJ. S. DEPT. OF AGRICULTURE 



3. Potentilla glandulosa LindL, Edwards's Bot. Reg. 19: pi. 1583. 



1833. 



Drymocallis glandulosa Rydb., Columbia Col. Bot. Men. 2: 



198. 1898. 

 Drymocallis arizonica Rydb., North Amer. Fl. 22: 373. 1908. 



Near Williams and Mormon Lake (Coconino County), Mazatzal 

 Mountains (Gila County), 5,000 to 7,000 feet, wet places, May and 

 June, type of D. arizonica from Mormon Lake (MacDougal 64). South 

 Dakota to British Columbia south to New Mexico, central Arizona, 

 and California. 



It is stated that the petals are white. 



4. Potentilla sibbaldi Hall. f. ex. Ser., Mus. Helv. 1: 51. 1818. 



Sibbaldia procumbens L., Sp. PL 284. 1753. Not Potentilla 

 procumbens Sibth. 



San Francisco Peaks (Coconino County), 11,000 to 12,000 feet, 

 July and August. Circumpolar and alpine in the Northern Hemi- 

 sphere. 



5. Potentilla anserina L., Sp. PL 495. 1753. 



Argentina anserina Rydb., Columbia Col. Bot. Mem. 2: 159. 

 1898. 



White Mountains (Apache and Greenlee Counties), Flagstaff and 

 vicinity (Coconino County), wet mountain meadows, May to August. 

 Widely distributed in the cooler parts of the Northern Hemisphere. 



Silverweed. The typical form, with leaves green above, occurs in 

 the White Mountains, and var. concolor Seringe (Argentina argentea 

 Rydb.), with leaves silvery-sericeous on both faces, in the Flagstaff 

 region. 



6. Potentilla multifoliolata (Torr.) Kearney and Peebles, Wash. Acad. 



Sci. Jour. 29: 481. 1939. 



HorkeliaC?) multifoliolata Torr. in Sitgreaves, Zuni and Colo. 



Rpt. 159. 1853. 

 Comarella multifoliolata Rydb., Columbia Col. Bot. Mem. 2: 



156. 1898. 

 Ivesia multifoliolata Keck, Lloydia 1: 125. 1938. 



San Francisco Peaks, Mormon Lake, Oak Creek, Mogollon Escarp- 

 ment (Coconino County), 5,900 to 7,500 feet, in washes, etc., June 

 to August, type collected in "western New Mexico" (now Arizona) by 

 Woodhouse. Known only from Arizona. 



*7. Potentilla sabulosa M. E. Jones, Calif. Acad. Sci. Proc. ser. 2, 5: 

 680. 1895. 



Horkelia mutabilis T. S. Brandeg., Bot. Gaz. 27: 446. 1899. 

 Ivesia sabulosa Keck, Lloydia 1: 124. 1938. 



Not known definitely from Arizona, but occurs in southern Utah and 

 Nevada. 



8. Potentilla thurberi A. Gray, Amer. Acad. Arts and Sci. Mem. ser. 

 2,5:318. 1855. 

 Apache, Navajo, and Coconino Counties, south to Cochise and 

 Pima Counties, 6,000 to 9,000 feet, rich soil of coniferous forests, July 



