HOSACE.E. 107 



HAS* Fields and woods. Can. to Car. May Aug. *>. Fknccrt 

 yellow. Is not this a mere variety of the last ? 



6. P. argentea Linn. : stem ascending or erect, tomentose ; leaves 

 quinate-palmate ; leafets obovate-wedgeform, incised, revolute on the 

 margin, white and tomentose beneath ; flowers numerous, corymbed ; 

 lobes of the calyx lanceolate, shorter than the corol. 



b. dentata De Cand. : leafets subentire, 34 toothed at the apex, 

 tomentose beneath. JP. cinerea Raf. 



HAB. Fields. Can. and throughout the N. S. June Sept. If. 

 Stems 4 10 inches long. Leaves green above. Flowers yel- 

 low. Silvery Cinquefoil. 



*** Leaves pinnate. 



7. P. fruticosa Linn. : stem fruticose ; leaves pinnate, hirsute ; leaf- 

 ets oblong-lanceolate, very entire, approximate ; stipules lanceolate, 

 membranaceous, acute ; flowers in corymbs, large ; petals longer than 

 the calyx. P. fruticosa and P. Jloribunda Pursh. 



HAB. Margins of swamps. N. S. N. to Arc. Amer. W. to Rocky 

 mountains. June. T>. A shrub 2 feet high, much branched 

 and hairy. Flowers large, yellow. P. Jloribunda of Pursh, dif- 

 fers only in having the leaves and flowers more numerous. 



8. P. supina Linn. : stem de'cumbent, herbaceous, dichotomous ; 

 leaves pinnate ; leafets obovate or oblong, somewhat glabrous, more 

 or less toothed ; peduncles axillary, solitary, 1-flowered ; segments of 

 the calyx triangular-lanceolate ; petals as lohg as the calyx. 



HAB. Overflowed banks of streams. Can. and Penn. W. to Miss. 

 June Aug. 0. Floicers small, yellow. 



9. P. anserina Linn. : stem filiform, rooting ; leaves interruptedly 

 pinnate ; leafets ovate-oblong, incisely and acutely serrate, smooth 

 above, silky beneath ; stipules many-cleft ;* peduncles as long as the 

 leaves, axillary, solitary ; lobes of the calyx lanceolate, entire ; pe- 

 tals obovate, longer than the calyx. 



HAB. Wet meadows. N. S. N. to Arc. Amer. June. 1. 

 Stems long, reddish. Flowers yellow, on long axillary pedun- 

 cles. Silver-weed. Wild Tansey. 



10. P. pcnnsylvanica Linn. : whole plant white tomentose ; stem 

 herbaceous erect ; leaves interruptedly pinnate ; cauline ones 3-lobed, 

 lobes oblong-ovate, deeply dentate ; stipules lanceolate, somewhat la- 

 ciniate ; flowers in corymbose panicles ; inner lobes of the calyx trian- 

 gular-lanceolate, outer ones oblong-lanceolate, as long as the corol ; 

 petals obcordate ; receptacle pilose ; carpels rugulous. P. arguta 

 Lehm. not of Pursh. 



HAB. N. S. N. to Arctic Amer. June. It.Stcm 12 feet 

 high. Flowers pale yellow. 



11. P. arguta Pursh : erect, simple, pubescent ; leaves pinnate ; 

 ieafetc ovate, gharply dentate, outer ones larger ; stipules rhomboidaJ, 



