68 COMMON CANADIAN WILD PLANTS. 



* * Styles filiform, not glandular at the base. Inflorescence 



cymose. 

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



7. P. Hippia'na, Lehm. Densely white-tomentose through- 

 out. Stem slender. Leaves pinnate, of 5-11 leaflets, dimin- 

 ishing regularly down the petiole. Leaflets sharply toothed 

 at least at the apex. Stamens 20. N.W. 



Var. puleher'rima, Watson, has the upper surf aces of the 

 crowded leaflets green and pubescent. N.W. 



8. P. effu'sa, Dougl. Tomentose throughout, with scat- 

 tered villous hairs. Stems diffusely branched above, 4-12 

 inches high. Leaflets 5-11, interruptedly pinnate. Carpels 

 10. N.W. 



9. P. Flatten' Sis, Nutt. Stems decumbent. Pubescence 

 appressed silky- villous throughout. Leaflets 7-13, crowded, 

 deeply cut-pinnatifid into linear segments. Flowers few. 

 Carpels many. N.W. 



10. P. gra'CiliS, Dougl. Stems 2-3 feet high. Leaves 

 palmate, of about 7 leaflets, the latter serrate, tomentose 

 beneath, green above. Carpels many. N.W. 



Var. flabellifOP'mis, Torr. and Gray, has very deeply 

 pinnatifid leaflets. N.W. 



Var. riglda, Watson, is villous, but not tomentose, and 

 usually tall and stout. N.W. 



11. P. pilo'sa, Willd., is distinguished from the preceding 

 species by its tall rigid stems and light yellow flowers. 

 Niagara Falls, not common. 



12. P. argen'tea, L. (SILVERY C.) Stem ascending, 

 branched at the summit, white-woolly. Leaves palmate, of 

 5 leaflets, the latter deeply serrate towards the apex, with 

 revolute margins, and woolly beneath. Petals yellow, longer 

 than the sepals. Dry fields and roadsides. 



13. P. humifu'sa, Nutt. Stems decumbent, 2-4 inches 

 long, slender. Densely white-tomentose. Leaflets 5, serrate 

 at the rounded or truncate apex with 3 or 5 teeth. N.W. 



