76 MEMOIRS FROM THE DEPARTMENT OF BOTANY OF COLUMBIA UNIVERSITY 
lower stipules; upper stipules green, ovate, entire. Basal leaves many, digitately 5- (sel- 
dom 3-) foliolate with an additional pair of smaller leaflets on the petiole, about 1 em. 
below the others ; leaflets 1-4 cm. long, oblong or oboyate, deeply incised into oblong 
rather obtuse segments, silky and green aboye, silky and white-tomentose beneath. Stem 
leaves generally ternate, few and reduced in size. Hypanthium silky-hirsute, in fruit 
5-8 mm. in diameter ; bractlets oblong, obtuse or acute, about a third shorter than the 
ovate-triangular acuminate sepals. Petals broadly obcordate, exceeding the sepals. Sta- 
mens about 20. Style filiform, nearly terminal. Achenes smooth. 
As before noted this somewhat resembles the species of the gracilis group, especially 
P. fastigiata in size and P. pulcherrima in the form of the leaflets and the pubescence. 
The latter has digitate or more or less pinnate leaves with approximate leaflets, but they 
are never, as in P. subjuga, digitately 5-foliolate with a pair of smaller ones some distance 
below. In P. subjuga, the leaflets are more deeply incised and the stem and branches 
stricter, and the latter rather divergent; they are few-flowered, as in P. nivea, from which 
the plant differs in the number of the leaflets. 
Colorado: N. H. Patterson, No. 192, 1892 (from near Empire, type); 1885 (from 
Gray’s Peak); C. 8. Crandall, No. 184, 1892 (from Graymont); T. C. Porter, No. 44; 
Hall and Harbour, No. 160, mainly ; No. 161, 1862. 
57. Potentilla quinquefolia. 
Potentilla nivea pentaphylla Lehm. Noy. Stirp. Pug. 9:69. 1851. Not P. pentaphylla 
Richt. 1815. 
Lehm. in Hook. Fl. Bor. Am. 1: 195; Turez. Bull. Soc. Nat. Moscow, 16: 607*; 
Lehm. Rev. Pot. 169; Walp. Ann. 2: 509. 
Potentilla nivea quinquefolia Rydb. Bull. Torr. Bot. Club, 23: 302. 1896. 
InLustrations: Pare 30, f. 1; dissection of flower, f. 2; stamen, f. 3; pistil, fi 4; 
fruiting hypanthium and calyx, f. 5. 
Rootstock rather short and thick; stems generally several, ascending, 1.5-2 dm. 
high, rather loosely silky-villous, more or less tinged with brown. Basal leaves rather 
many, with silky-villous petioles 83-5 em. long, 5- (seldom 3-) foliolate, generally with the 
terminal leaflet short-petiolate, silky-villous above, white-tomentose beneath. Stem 
leaves trifoliolate ; leaflets broadly obovate, cleft about half way to the midrib into ob- 
long segments, 1.5-3 cm. long; stipules large, ovate, .5-1 em. long. Hypanthium 
loosely silky ; bractlets linear-lanceolate, somewhat shorter than the lanceolate sepals. 
Petals obovate, emarginate, a little exceeding the sepals. Stamens about 20.  Pistils 
many; style short, filiform or slightly thickened at the base. 
