December 31, I906 207 



POTENTILLA PENNSVLVANiCA L. Mant. 76. 1767. Form. 



No. 8216, collected May 9, in Silver canyon in the White 

 mountains opposite Laws, Inyo county, growing on the banks 

 of a small stream, the plants low and matted together. Deter- 

 mined by Professor Greene, who says it "is what I think every- 

 body has always called this, rightly or wrongly." 



POTENTILLA PULCHERRIMA Lehm. Stirp. Pug. 2: 10. 1830. 



No. 8351, collected May 30, in damp meadows near Bishop, 

 Inyo county, and rather plentiful at this particular place. Com- 

 monly confused with P. gracilis. Determined by Professor 

 Greene. 



TRiDOPHYtLUM BiENNE Greene, Leaflets, 1: 189. 1906. 



Poteniilla biennis Greene, Fl. Fran. 65. 1891. 



No. 8217, collected May 9, in Silver canyon in the White 

 mountains opposite Laws, Inyo county, in moist soil on the 

 banks of a small stream, but not plentiful. The writer also 

 found it in 1903 on the east side of the Sierra at Donner Lake. 

 The original from "moist places in the mountains, from Butte 

 Co. to Kern and San Luis Obispo." 



PuRPUSiA SAXOSA Braudegee, Bot. Gaz. 37: 446. 1899. 



No. 8297, collected May 21, in the Sierra foothills in thtr 

 first canyon south of Bishop, Inyo county, growing in crevices 

 of granite rocks. Also seen under similar conditions west of 

 Bishop. The type came from "Sheep Mountains, Nevada, at 

 40005000 feet altitude." 



HoRKEUA CAUFORNiCA C. & S. Liunaea, 3: 26. 1827. 



Potentilla Californica Greene, Pittonia, 1: 100. 1887. 



No. 8374, collected June 8, on the San Bruno hills at 

 Ocean View, San Francisco, where it is plentiful, as it is said 

 to be in similar situations about the city when protected from 

 stock. The type was collected at San Francisco. 



