Hooker's Cinquefoil

Potentilla hookeriana L,ehm. Delect. Sem. Hort
Hamb. 1849 : 10. 1849.
Perennial ; stems several from the caudex, 1-2 dm. high, white-tomentose and silkyvillous, ascending, few-leaved ; stipules lanceolate, acute ; leaves with petioles 1-2 cm. long, ternate or occasionally with a pair of small extra leaflets, white on both sides, silkyvillous above, densely tomentose beneath ; leaflets obovate in outline, 1-2 cm. long, deeply cleft to near the midrib into oblong lobes ; middle leaflet short-petioled ; flowers in small dense cymes, about 8-10 mm. in diameter ; hypanthium densely silky-villous, in fruit 5 mm. in diameter ; bractlets linear, about equaling the lanceolate, acute sepals ; petals obcordate, generally a little exceeding the sepals; stamens 20; pistils numerous; styles short, a little thickened and glandular at the base.
Type locality : North America.
Distribution: Saskatchewan to Alberta and Montana. .

Potentilla quinquefolia Rydb. Mem. Dep. Bot. Columbia
Univ. 2 : 76. 1898.
Potentilla nivea pentaphylla I^ehm. Delect. Sem. Hort. Hamb. 1850: 12.* 1850. Not P. pe?i~
taphylla Richt. 1815. Potentilla nivea quinquefolia Rydb. Bull. Torrey Club 23 : 302. 1896. Potentilla subquinala Rydb. Bull. Torrey Club 28 : 181, in part. 1901.
Perennial, with a rather short and thick rootstock or caudex; stems generally several, ascending, 1.5-2 dm. high, rather loosely silkyvillous, more or less tinged with brown ; basal leaves rather many, with silkyvillous petioles 3-5 cm. long, 5(seldom 3-) foliolate, usually with the terminal leaflet short-petiolulate, silky-villous above, white-tomentose beneath ; stem-leaves trifoliolate ; leaflets broadly obovate, cleft about halfway to the midrib into oblong segments, 1.5-3 cm. long ; stipules large, ovate, 0.5-1 cm. long ; hypanthium loosely silky ; bractlets linear-lanceolate, somewhat shorter than the lanceolate sepals, about 4 mm. long; petals obovate, emarginate, a little exceeding the sepals; stamens about 20; pistils many ; styles short, filiform or slightly thickened at the base.
Type locality : [British] North America.
Distribution: Mountains and hills from Saskatchewan to British Columbia, Colorado, and Utah.