432 



leafless ; basal leaves on petioles 3-6 cm. long, digitately 5-foliolate, 

 silky and greenish above, white-tomentose beneath ; leaflets 3^-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 i 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 Multijiigae 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. Ricliardii Lehm., 

 from Mexico, differing from P. Plattensis mainly in the spreading 

 pubescence, and the following North American species : 



PoTENTiLLA Plattensis Nutt.; Torr. & Gray, Fl. N. Am. i : 



439. 1840. 



The type specimens of Nuttall have light green leaves with 

 4-8 pairs of oblong-cuneate leaflets, dissected into broadly oblong 

 obtuse segments y^ cm. long, and a stem that is more or less as- 

 cending. In the more common form, however, the segments are 

 often y^ cm. long, nearly linear and often acute, the stem more 

 or less spreading and the flower-clusters very irregular. It may 

 be a good variety. 



All forms of P. Plattensis are characterized by the stipules, 

 which are unusually large for the size of the plant. Its range is 

 from Colorado and Utah to the Saskatchewan, but it belongs to 

 the valleys of the high plains rather than to the alpine regions. 



PoTENTiLLA PiNNATiSECTA (Wats.) Avcn Nclson, Bull. Wy. Exp. 



St. 28: 104. 1896. 



P. diversifolia pinnatisecta Wats. King's Rep. 5 : 87 (in part), 

 1871. 



