68 COMMON CANADIAN WILD PLANTS. 



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



cymose. 



1- Style arising from the top of the carpel. 



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

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

 ishinjr regularly down the petiole. Leaflets sharply toothed 

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



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

 crowded leaflets green and pubescent. — N. W. 



8. P. eflFu'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'eilis, Dougl. Stems 2-3 feet high. Leaves 

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

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



Var. flabelllfOF'miS, Torr. and Grray, has very deeply 

 pinnatifid leaflets. — N.W. 



Var. rig'ida, 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, slendiT. Densely white-tomentose. Leaflets 5, serrate 

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



