210 



ROSACEAE. 



[VOL. II. 



4. Potentilla intermedia L,. Downy 

 Cinquefoil. (Fig. 1916.) 



Potent ilia intermedia L. Mant. i: 76. 1767. 



Perennial, stem i-2^ high, usually ascend- 

 ing, leafy and much branched, finely pubescent 

 with long hairs. Leaves green and finely hirsute 

 on both sides, somewhat tomentose beneath, all 

 but the uppermost 5-foliolate, the lower loug-pe- 

 tioled; stipules narrow, acute, mostly entire; leaf- 

 lets obovate or oblong, the teeth rather obtuse; 

 flowers numerous, cymose, yellow, leafy -bracted; 

 petals obcordatc, equalling the triangular-ovate 

 acute sepals and oblong bractlets; stamens about 

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



Massachusetts, New York and New Jersey. Ad- 

 ventiye from Europe. Resembles P. Monspeliensis, 

 differing in its 5-foliolate leaves, and perennial root. 



5. Potentilla recta L. Rough-fruited 

 Cinquefoil. (Fig. 1917.) 



Polenlilla recta L. Sp. PI. 497. 1753. 

 Potentilla pilosa Willd. Sp. PI. 2: 1109. 1799. 



Erect, rather stout, branched above, villous-pu- 

 besccnt, i-2 high. Stipules ovate-lanceolate, the 

 lower foliaceous and laciniatc; leaves digitately 

 5-7-foliolate, all but the uppermost petioled; leaf- 

 lets oblanceolate or oblong-lanceolate, obtuse at 

 the apex, narrowed or cuneate at the base, green 

 both sides, sparingly pubescent with scattered 

 hairs above, more pubescent beneath, incised-dcn- 

 tate, I '-3' long, with divergent teeth; flowers ter- 

 minal, cymose, yellow, numerous, 6"-g" broad; 

 stamens about 20; style slender, terminal; carpels 

 rugose. 



In waste places, Ontario, NY\v York, Yirginia and 

 Michigan. Aclvi-ntivc from Kurope. Native aN ..I 

 Asia. June-Sept. 



Potentilla nivea L,. Snowy Cinquefoil. (Fig. 1918.) 



Polentilla nivea L. Sp. PI. 499. 1753. 



Stems 2'-6' high, woody at the base, ascending or 

 erect, silky-villous, the flowering ones mostly simple. 

 Stipules membranous, silky; leaves 3-foliolate (very 

 rarely 5-foliolate), the lower petioled; leaflets obo- 

 vate, oblong or oval, obtuse, incised-dentate or cre- 

 natc, densely white-pubescent beneath, green and 

 loosely villous above, 4 // -8 // long, the terminal one 

 generally cuneate, the others narrowed or rounded 

 at the base; flowers 1-5, terminal, pedicelled, yellow, 

 "-<$" broad; sepals silky, lanceolate, acute, shorter 

 than the broadly obovate emarginate petals, longer 

 than the bractlets; stamens about 20; style filiform, 

 terminal; achcnes glabrous. 



Labrador, Greenland and throughout arctic America 

 to British Columbia, south in the Rocky Mountains to 

 Utah and Colorado. Also in arctic and alpine Europe 

 and Asia. Summer. 



