Rydberg : Further Studies on the Potentilleae 175 



obovate and emarginate, 6-8 mm. long, exceeding the sepals : 

 stamens about 20. 



This species is nearest related to P. pulcherrima Lehm., and I 

 had referred all the specimens cited below, except the type, to that 

 species. It differs from P. ptilcherriina in the very slender pedicels, 

 the total lack of tomentum on the hypanthium and the calyx and 

 the evident viscidity of these organs and the pedicels. It grows in 

 mountain meadows and on hillsides at an altitude of 2400-3200 m. 



Colorado: Wahatoya Cafion, Spanish Peaks, 1900, Rydbcro 

 & Vrecland, 6ojg (type); West Mancos Canon, 1898, Baker, 

 Earle & Tracy, ^06 ; La Plata Mountains, 182. 



Montana: Bridger Mountains, 1896, /. H. Fiodman, ^61. 



Potentilla permollis sp. nov. 



A stout hoary perennial. Stems simple, about 6 dm. high, 

 densely and softly pubescent with long whitish hairs : basal and 

 lower stem-leaves usually 7-foliolate, digitate ; petioles about i dm., 

 long, pubescent : leaflets obovate to oblanceolate, obtuse, coarsely 

 cleft nearly half way to the midrib, with lanceolate lobes, densely 

 soft-pubescent on both sides, greenish above, white and somewhat 

 tomentose beneath: upper stem-leaves 3-5-fonolate, similar, smaller, 

 short-petioled : stipules of the stem-leaves large, adnate to the peti- 

 ole, ovate, often over 3 cm. long : cyme rather open : hypanthium 

 and calyx densely white-pubescent : bractlets linear-lanceolate, 

 about equalling the lanceolate sepals : petals yellow, 6-7 mm. 

 long, obcordate, exceeding the sepals by about one fourth : sta- 

 mens about 20. 



This species is nearest related to P. BlascJikeana ; but differs 

 principally in the denser and white pubescence and the smaller 

 flowers. It grows in meadows. 



Washington: Endicot, Whitman Co., 1898, A. D. E. Elmer, 



1830. 



Potentilla obovatifolia sp. nov. 



A low perennial with a thick tap-root : stems ascending or de- 

 pressed, 2-3-leaved, 1.5-2 dm. high, sparingly villous : basal 

 leaves mostly digitately 7-foliolate with petioles 3-10 cm. long : 

 leaflets broadly obovate, obtuse, coarsely crenate-serrate, green 

 and sparingly hairy above, white tomentose beneath, . 5-3 cm. long : 

 stem leaves mostly 3-foliolate, small, short-petioled with broadly 

 lanceolate stipules : cymes open but few-flowered : hypanthium 

 and calyx densely silky : bractlets and sepals lanceolate, sub- 



