MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 211 



It most resembles P. ftdche^-rinia in the form of the leaflets, but 

 the plant is much lower, the cyme contracted and the leaves beneath 

 less tomentose, never white. 



It grows in dry places, at an altitude of 1500-2500 m. 



Montana: Ntdtall; West Gallatin, 1883, Scribncr, ^^b. 



Yellowstone Park: 1893, T. H. Biirglchaus. 



Potentilla pulcherrima Lehm. Stirp. Pug. 2: 10 [Rydb. Mon. 65] ; 



Potentilla Ilippiaiia fulchcrrima Wats. Proc. Am. Acad. 8: 555, 



in part [Man. R. M. 84, in part] . 



Watson evidently confused two somewhat similar, but apparently 

 distinct plants. The true P. pulcherrima is a tall plant related to 

 P. gracilis, with either digitate or closely pinnate leaves, the crenate 

 leaflets white-tomentose beneath. 



It grows in rich soil in open valleys, at an altitude of 2000-2500 m. 



Montana: Bozeman Cafion, 1895, Rydbcrg, 26pj ; Bridger Mts., 

 1896, Plod/nan, J62 ; Little Belt Mts., S^3 ^' Spanish Basin, June 26 

 and 28, 1897, Rydbcrg & Bessey, 4373 and 4374; Jack Creek, Jul}- 

 H' 4375; Pony, July 6, 4380. 

 * Potentilla Candida Rydberg, Bull. Torr. Bot. Club, 24: 6 [Mon. 



67]- 



Similar to the preceding, but is a much lower plant with sil- 

 very-white crenate leaflets, their upper surface being white-silky, the 

 lower silky and tomentose. It is an alpine plant, growing at an alti- 

 tude of 2000-3000 m. 



Montana: Deer Lodge, 1895, Rydbcrg, 2688; Lima, 2687; 

 Bridger Mts., June 10, 1897, Rydbcrg ct- Bcsscy, 4377; F. IV. Hay- 

 dcn, i860. 



Potentilla Blaschkeana Turcz. ; Lehm. in Otto, Gart. & Blumenz. 



9: 506 [Rvdb. Mon., 69] ; Potentilla gracilis Wats. Proc. Am. 



Acad. 8: 557, in part [Man. R. M. 85] ; not Lehm. 



This has been regarded as P. gracilis, but is distinguished by the 

 stouter habit, the large flowers, contracted cymes and the form of the 

 leaflets. These are, in P. Blaschkeana, obovate or broadly oblance- 

 olate in outline, divided half way to the midrib into oblong segments. 

 In P. gracilis the leaflets are narrowl}' oblanceolate and with coarse 

 triangular teeth ; the leaves are white-tomentose beneath in both. 

 P. gracilis is a native of the west coast and does not reach Montana. 

 P. Blaschkeana grows in valle3's at an altitude of 1000-2000 m. 



