8 



flabelliformis, but the plant is more delicate and the pubescence is 

 silky and rather scant. Specimens : 



Arizona: E. Palmer, no. 145, 1877. Wyojiiing : C. E. Shel- 

 don, no. 72, 1884 ; Fremont, 2d exp. Montana: Robert Adams, 

 1 87 1. UtaJi: ]>. F. Ward, no. 119, 1875; M. E. Jones, no. 5554d 

 and 35544, 1894; no. 765, 1880; Mrs. Thompson, no. 195, 1873. 



POTENTILLA ETOMENTOSA n. sp. 



Potcntilla rigida Newberry, Pac. R. R. Rep. 6 : Part 3. 72. 

 Not Nutt. 



Potcntilla gracilis rigida Coville, Cent. U. S. Nat. Herb. 4 : 96. 



1893. 



Stem 4-5 dm. high, slightly hairy, erect, from a stout caudex ; 

 stipules ovate, lanceolate, entire; leaves on long petioles, digi- 

 tate, of about 7 leaflets, glabrate above, slightly silky-strigose be- 

 neath but without any trace of tomentum ; leaflets obovate, 3-5 

 cm. long, crenate or serrate with ovate teeth ; calyx hirsute; bract- 

 lets oblong, a little shorter than the ovate pointed sepals ; petals 

 obcordate, scarcely exceeding the sepals. 



This resembles mostly P. pnlcheininia but is perfectly without 

 tomentum and only slightly hairy. It resembles P. Nuttallii only 

 in the lack of tomentum. It has the crenate, obovate leaves of 

 P. pidcherrinia, and if not held distinct must be regarded as a va- 

 riety thereof The distribution is quite different, P. pidcJierrima 

 not having been collected in California. The following are the 

 specimens seen : 



California: Fremont, no. 162, 1846 (Type); J. S. Newberry 

 (Williamson Expedition); Munson & Hopkins, 1889; Coville & 

 Funston, no. 1399, 1891. 



PoTENTiLLA NuTTALLii Lehm. Ind. Sem. Hort. Bot. Hamb. 1852: 



12. 1852. 



Potcntilla recta Nutt. Gen. i : 310. 1818. Not L. 



Potcntilla rigida Nutt. Journ. Acad. Phila. 7: 20. 1834. Not 

 Wall. 



Potcntilla gracilis rigida Wats. Proc. Am. Acad. 7: 557. 1873. 



The general habit of this species resembles that of 7^. Blasch- 

 kcana, but the plant is green, without tomentum and coasely hir- 

 sute. The distribution is from Colorado to California, British 

 Columbia and Saskatchewan. 



