I 



174 Rydberg : Further Studies on the Potentilleae 



ovate -lanceolate, acute sepals : petals yellow, 5-6 mm. long, ob- 

 ovate, about one fourth longer than the sepals. 



The species is a member of the gracilis group and nearest re- 

 lated to P. flabelliformis, from which it differs in the light brown 

 or yellowish pubescence and the lack of tomentum on the lower 

 surface of the leaves. The type was collected at an altitude of 

 nearly 2000 m. 



Wyoming : Spread Creek, in the Teton Forest Reserve, 1897, 

 F. Tweedy, 212. 



y Potentilla Townsendii sp. nov. 



A slender perennial with a deep root and a short caudex, 

 covered by the brown remains of old leaves : stem ascending, 3-5 

 mm. high, sparingly silky : petioles of the digitate basal leaves 7-10 

 mm. long, slightly hairy ; stipules adnate to the petioles ; the 

 free portion linear-subulate ; leaflets 5-7, oblanceolate to almost 

 linear, serrate, acute, glabrous above, sparingly hairy beneath, 

 principally on the veins : stem-leaves 2-3, similar, but with 

 shorter petioles : stipule large, 3-4 cm. long, lanceolate or ovate- 

 lanceolate : cyme rather open : hypanthium and calyx silky- 

 strigose : bractlets linear-lanceolate, equalling the lanceolate 

 sepals : petals yellow, broadly obcordate, about 1 cm. long and 

 almost twice as long as the sepals. 



This species is perhaps nearest related to P. heptaphylla, but 

 easily distinguished by the narrow leaflets and the larger flowers. 

 It was collected at an altitude of about 2250 m. 



Mexico, State of Chihuahua : Sierra Madre, near Colonia 

 Garcia, July 17, 1809, Tow ns e nd & Barber % 10s. 



Potentilla filipes sp. nov. 



A 



stems from the short caudex. 



Stem 3-5 dm. high, slender, silky-hirsute, simple up to the in- 

 florescence : few-leaved : basal leaves mostly 7-foliolate, digitate, 

 with hirsute petioles, 5-1 5 cm. long ; leaflets obovate to oblanceo- 

 late, obtuse, coarsely crenate, 2-6 cm. long, green and sparingly 

 strigose above, white-tomentose beneath ; stem-leaves similar, but 

 smaller, usually 5-foliolate, short-petioled : stipules ovate-lanceo- 

 late, entire : cyme open : pedicels very slender, as well as the 

 hypanthium and calyx silky hirsute and more or less viscid : 

 bractlets linear-lanceolate, a little shorter than the lanceolate, acute 

 sepals : petals yellow or somewhat orange, broadly obcordate or 



