!=;6 



rosaci-:ae. 



Vol. II. 



17. Potentilla effusa Dougl. P. ranched 

 Cinque full. Fig. 2243. 



/'. effusa Dougl.; Lchm. Nov. Stirp. Pus. 2: 8. 1830. 



Plant perennial, 6-18' liigli, diffusely branched 

 above. Leaves pinnate, tomentose-canescent, but not 

 silky; leaflets S-ii, or those of the upper leaves only 

 1-3, oblong, obtuse at the apex, commonly cuneate 

 at the base, incised-dentate, -i long; flowers 

 yellow, 2"-z" broad, loosely cymose, yellow ; bractlets 

 much shorter than the lanceolate acuminate calyx- 

 lobes; petals obovate, emarginate, exceeding the 

 calyx-lobes; stamens about 20; achenes glabrous. 



Prairies, western Minnesota to Saskatchewan, 

 berta, Nebraska and New Mexico. Summer. 



Al- 



18. Potentilla Hippiana Lehm. Woolly 

 Cinquefoil. Fig. 2244. 



P. Hipt>iana Lehm. Nov. Stirp. Pug. 2: 7. 1830. 

 Potentilla lencophylla Torr. Ann. N. Y. Lye. 2: 197. 

 18J5. Not Pall. 1773. 



Erect or ascending, perennial, branched above, 

 rather stout, i-2i high, densely floccose as well 

 as silky. Stipules lanceolate, acuminate, entire; 

 lower and basal leaves petibled, pinnately 5-1 1- 

 f oliolate ; leaflets oblanceolate or oblong, obtuse, 

 narrowed or cuneate at the base, 6"-i8" long, 

 incisely dentate, very white beneath, the lower 

 ones smaller than the upper, and no smaller ones 

 interspersed ; flowers terminal, yellow, loosely 

 cymose, 3"-6" broad ; petals obovate, retuse, a 

 little exceeding the lanceolate acute calyx-lobes 

 and slightly narrower bractlets ; stamens about 

 20; style filiform; achenes glabrous. 



Dry soil, northwestern Minnesota and Assiniboia 

 to British Columbia, south to New Mexico and Ari- 

 zona. June-Aug. 



19. Potentilla multifida L. Cut-leaved 

 CiiKjuefoil. Fig. 2245, 



Potentilla multifida L. Sp. PI. 496. 1753. 



Perennial, stems several or many from the caudex, 

 low, asceding or spreading, appressed-silky. Stipules 

 large, lanceolate, acuminate, scarious, brown; leaves 

 pinnately 5-9-foliolate, grayish-tomentose beneath, 

 glabrate above ; leaflets finely divided to near the 

 midrib into linear acute segments, with more or 

 less revolute margins ; petals yellow, a little exceed- 

 ing the ovate-lanceolate acute sepals ; stamens about 

 20; style terminal, short, not thickened at the base; 

 achenes smooth, or slightly rugose. 



Hudson Bay to Great Slave Lake. Also in arctic and 

 alpine Europe and Asia. Summer. 



