POTENTILLA BICRENATA IL sp.
Low and simple from an erect scaly rootstock ; stem erect, cm. high, about equalling the leaves, 1-3-flowered, nearly leafless ; basal, leaves on petioles 3-6 cm. long, digitately 5-foliolate, silky and greenish above, white-tomentose beneath ; leaflets I4-2 cm. long, oblong-cuneate, margins entire, except at the very apex, where there are 2 (seldom 4) notches making the leaflet 3- (sel dom 5-) toothed at the apex, the middle tooth generally the small est; flowers about 1 cm. in diameter; calyx silky ; bractlets and sepals ovate or lance-ovate, the former smaller; petals obovate, merely truncate.
It much resembles the preceding, but is more delicate, not at all spreading, has a subscapiform stem and smaller flowers, but the most striking difference is the form of the leaflets.
New Mexico: C. D. Walcott, no. 66, 1883 (Type).
Colorado: E. L. Greene, 1875.
The Multijugae is a group of Potentillas in many respects re minding us of the Multifidae. The leaves in both are pinnate with several leaflets, but the pinnae in .the present group are generally much more numerous; the pubescence is hirsute, strigose or silky, always without any indication of tomentum, and the style is al ways long and filiform. To this group belong P.Richardii Lehm., from Mexico, differing from P. Plattensis mainly in the 'spreading pubescence, and the following North American species :