ROSACES. 67 



9. POTENTILLA, L. ClNQUE-FOlL. FlVF-FINGER. 



*Styles thickened and glandular towards the base. Inflorescence 

 cymose. 



*- Style arising from near the base of the carpel. 



1. P. aPgU'ta, Pursh. Stem stout, 1-2 feet high, brown- 

 ish-hairy. Leaves pinnate, of 7-11 oval serrate leaflets, 

 lowny underneath. Flowers in dense cymose clusters. 

 Petals yellowish or cream-coloured, deciduous. Stamens 

 about 30. Plant clammy above. Dry thickets. 



i- - Style arising from the top of the carpel. 



2. P. Norve'giea, L. (NORWAY CINQUE-FOIL.) Stem erect, 

 hairy, branching above. Leaves palmate, of 3 leaflets ; leaf- 

 lets obovate-oblong, coarsely serrate. Flowers in cymose 

 clusters. Calyx large. Petals pale yellow, small, not longer 

 than the sepals. Stamens about 15. Fields and low grounds. 



3. P. riva'lis, Nutt., var. millegra'na, Watson. More 

 slender and branching than the last, softly villous. Leaves 

 all of 3 serrate leaflets. Cymes loose. Calyx small. Petals 

 yellow, minute. Stamens 10-20, rarely 5. N.W. 



4. P. paradox'a, Nutt., (P. supi'na, L.) a plant of 

 spreading or decumbent habit, with pinnate leaves of 5-11 

 leaflets, loose leafy cymes, small petals, as long as the sepals, 

 and achenes with an appendage at the base, occurs along 

 the western shore of Lake Ontario. 



5. P. Pennsylvan'iea, L. Perennial ; more or less white- 

 woolly. Leaflets 5-9, white-woolly beneath, less so above, 

 cut-pinnatifid, the segments linear. Stamens about 25. 

 Chiefly eastward and N.W. 



Var. strigO'sa, Pursh, is silky-woolly throughout, 6-12 

 inches high. Leaflets deeply pinnatifid, the margins of the 

 narrow lobes revolute. Cyme short and close. N.W. 



6. P. reeta, L. Perennial, tall, sparingly villous, glandu- 

 lar-puberulent. Leaves palmate, of 5-7 leaflets, the latter 

 cut-pinnatifid. Flowers yellow, large, in a broad cyme. 

 Not common. 



