'.' 



New Plants from Colorado 



15v George E. Ostf.kiiout 



Potentilla rupincola 



Perennial from a branching caudex 2—3 dm. high, rather slen- 

 der and paniculately branched, glabrous except for a few stiff, 

 pointed hairs, and woolly pubescence at the base of the calyx and 

 beneath it : the outer stems declined at base : numerous root 

 leaves crowning the rootstock, 6-10 cm. long, slender-pctioled^ - . 

 interruptedly pinnate with 5 to 7 leaflets w^hich are narrowly cuneate,, 

 incised above with pointed teeth, glabrous except for a few stiffs 

 pointed hairs on the midrib and margins : terminal leaflet petio- 

 lulate, the two adjacent lateral leaflets somewhat decurrent on the 

 rachis ; stem leaves reduced in size and number upward : stipules 

 lanceolate : cyme diffusely and paniculately branched : the calyx 

 about 5 mm. long, the lobes woolly at base and acuminate, the 

 linear bractlets but little more than half their length : petals yellow^ 

 very broadly obovate and retuse, about the length of the calyx 

 lobes: stamens about 18-2Q : pistils about 6: achene glabrous 

 but imbedded in the wool of the receptacle, somewhat ovate, the 

 upper end turned inward : the filiform style longer than the achene,, 

 attached to the under side of the incurved end. 



This Potentilla belongs to the Leucophylla group as defined by 

 Dr. Rydberg and is nearest to P, effnsa Dougl. having much the 

 same slender branching cyme and slender acuminate calyx lobes, 

 but is readily distinguished from other members of the group by 

 its glabrous character, and bright green crisp leaves. The speci- 

 mens from which the description is drawn were collected at Dale 

 Creek in Larimer Co., Colorado, July 20, 1898, where it grows ' • 

 in crevices of the high cliff on the cast side of the creek and in seams 



F 



of the outcropping rock on the west side. It was collected also in 

 the caiion of the upper Cache La Poudre in August, 1893. 



I wish to express my obligation to Dr. Rydberg's Monograph 

 of the Potentilleae which makes a study of our Potcntillac possible,, 

 and to Dr. Rydberg himself for the examination of specimens. 



Astragalus Hypoglottis bracteatus 



A slender usually branching perennial, from slender creeping 

 rootstocks : stem about 2 dm. high, upright and slightly pubescent, 



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