MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 65 



42. Potentilla fastigiata Nutt. 



Potentilla fastigmta. Nutt. ; Torr. & Gray, Fl. N. Am. 1: 440. 1840. 



Dietr. Syn. PL 3 : 182 ; Walp. Eep. 2 : 33. 



Gray. PI. Fendl. in Mem. Amer. Acad. 4 : 42; Proc. Am. Acad. 1863 : 61; Porter, 

 U. S. Geol. Surv. 1870 : 475; Rydb. Bull. Torr. Bot. Club, 24 : 7. 



Potentilla holopetala fastigiata Lehm. Stirp. Pug. 9: 46. 1851. 



Walp. Ann. 2 : 485 ; Lehm. Rev. Pot. 79. 



Potentilla gracilis fastigiata Wats. Proc. Am. Acad. 8 : 557. 1873. 



Brewer & Wats. Bot. Cal. 1: 179; Coult. Man. Bot. Rocky Mts. 85. 



Illustrations : Plate 21, f. 1. 



Stem low, 2-3 dm. high, ascending, generally quite den.sely silky-villous, rather 

 simple. Stipules ovate-lanceolate, often toothed, .5-1 cm. long. Leaves on rather 

 short petioles, digitate, of 5-7 leaflets, generally rather long silky-villous on both sides 

 and slightly tomentose beneath. Leaflets obovate, 1-3 cm. long, coarsely crenate or 

 somewhat incised with broad teeth. Cyme generally rather dense. Hypanthium 

 silky-villous, in fruit about 8 mm. in diameter. Bractlets oblong, shorter than the tri- 

 angular acute sepals. Corolla 10-15 mm. in diameter. Petals broadly obcordate, a lit- 

 tle exceeding the sepals. 



This perhaps comes nearest to P. imlcherrima, resembling it in the form of the leaf- 

 lets and the size of the flower, but it is a smaller plant, less than 3 dm. high and with a 

 rather crowded cyme. The pubescence of the leaves is also different, long, silky and 

 with very little tomentum beneath. It is a rather rare plant, entending from Wyoming 

 and California to Saskatchewan. 



Wyoming : A. Nelson, No. 931, 1894. 



Idaho: Sandberg, 1881 and 1887. 



Assinihoia: J. Macoun, No. 4539, 1894. 



Nevada: J. Torrey, No. 121, 1865. 



Yelloivstone National Park: T. H. Burglehaus, 1893. 



California: Geo. Hanson, No. 297, 1892. 



Washington : W. N. Suksdorf, No. 2488, 1884. 



Rocky Mts.: Nuttall (type). 



43. Potentilla pulcherrima Lehm. 

 Potentilla pulcherrima Jjehm. Stirp. Pug. 2 : 10. 1830. 

 Don, Gard. Diet. 2: 556; Walp. Ann. 2: 482; Lehm. Rev. Pot. 69. 

 Eat. Man. Ed. 7 : 459 ; Eat. & Wr. N. Am. Bot. 374 ; Wats, in King's Rep. 5 : 87 ; 



