Colorado Cinquefoil

Potentilla subjuga Rydb. Bull. Torrey Club 23 : 397. 1896
Tufted, from a perennial root and cespitose caudex ; stems many, 1-3 dm. high, silkyvillous, few-leaved, rather divergently branched above, the lower portion covered with the brown scarious lower stipules ; upper stipules green, ovate, entire ; basal leaves many, digitately 5(seldom 3-) foliolate with an additional pair of smaller leaflets on the petiole, about 1 cm. below the others ; leaflets 1-4 cm. long, oblong or obovate, deeply incised into oblong, rather obtuse segments, silky and green above, silky and white-tomentose beneath ; stem-leaves generally tern ate, few and reduced in size ; hypanthium silky-hirsute, in fruit 5-7 mm. in diameter ; bractlets oblong, obtuse or acute, about a third shorter than the triangular-lanceolate acuminate sepals, which are 5-6 mm. long ; petals broadly obcordate, exceeding the sepals; stamens about 20; styles filiform, nearly terminal; achenes smooth, many. .
Type locality : Near Empire, Colorado.
Distribution : Mountains of Colorado.

Potentilla minutifolia Rydb. Bull. Torrey Club 23 : 399. 1896
Cespitose perennial ; stems about 1 dm. long, slender, 1-or 2-leaved, sparingly silky or n early glabrous, slightly striate ; stipules ovate-lanceolate, the lower scarious and brown ; basal leaves very small, with slender petioles 3-5 cm. long, silky-hirsute, slightly grayish beneath, pinnate with two pairs of leaflets, the upper pair and the sessile odd leaflet about 5 mm. long, the lower pair only 2-3 mm.; leaflets obovate, incised, with oval rounded segments ; flowers 1 or 2, about 15 mm. in diameter ; hypanthium sparingly hirsute, in fruit 7-8 mm. in diameter; bractlets oblong, usually obtuse, about half as long as the oblonglanceolate, obtuse or acutish sepals, which are about 4 mm. long; petals obcordate, about a. half longer than the sepals ; stamens about 20 ; pistils many ; styles filiform.
Type locality : Pike's Peak, Colorado. Distribution : Mountains of Colorado.

Potentilla rubripes Rydb. Bull. Torrey Club 33 : 143. 1906
Potentilla rubricaulis Rydb. Mem. Dep. Bot. Columbia Univ. 2: 101. 1898. Not P. rubricaulis I^ehm. 1830.
More or less cespitose perennial ; stems ascending or prostrate, generally not much over 1 dm. long, appressed silkystrigose, more or less leafy and branched ; stipules ovate, acute ; leaves pinnate, of 2-3 approximate pairs and a sessile terminal leaflet, silky above, more or less white-tomentulose beneath ; leaflets 5-20 mm. long, obovate or oblong in outline, deeply dissected into narrowly oblong segments; cyme rather few-flowered, with erect branches ; flowers 12-16 mm. in diameter, on rather slender pedicels ; hypanthium silky, in fruit 5 mm. broad ; bractlets linear-oblong, shorter than the narrowly lanceolate acute sepals, which are about 5 mm. long ; petals obcordate, 6-8 mm. long ; stamens about 20 ;
styles filiform.
Type locality : Not given, but the type was collected on Pike's Peak, Colorado, June 25, 1896, Biltmore Colorado Expedition 1 425 (herb. N. Y. Bot. Gard.).
Distribution : Alpine regions from Utah and Colorado to Alberta.