106 DICOTYLEDONOUS PLANTS. 



9. POTENTILLA. Linn. 



Calyx with the tube concave ; limb 4 5 cleft, 4 5- 

 bracted without (or 8 10-cleft.) Petals 45. Stamens 

 many. Carpels many, roundish, rugose, naked, fixed to a 

 small dry receptacle. Jcosandria. Polygynia. 



* Leaves termite-palmate. 



1. P. norecgica Linn. : hirsute ; stem erect, dichotoinous above ; 

 leaves ternate-palmate ; leafets lanceolate or obovate, simply and 

 doubly serrate ; stipules lanceolate ; flowers numerous, subcorymbed 

 and axillary ; petals obcordate, shorter than the calyx ; lobes of tho 

 calyx lanceolate, acute. . 



HAB. Old fields. Can. to Car. N. to Arc. Amer. June Aug. 

 <}. Stem 8 10 inches high. Flowers yellow. Stipules large. 

 Perhaps introduced. Norway Cinquefoil. 



2. P. hirsuta Mich. : stem erect, hirsute, dichotomous above ; leaves 

 ternate, petiolate ; leafets obovate- wedgeform, deeply dentate ; stipules 

 lanceolate, subentire ; flowers axillary, subcorymbed ; petals oblong- 

 linear, shorter than the calyx ; carpels rugulous. P. morisoni De Cand. 



HAB. Western part of N. Y. N. to Subarc. Amer. July. . 

 Stem very hairy. Flowers few, in a terminal dichotomoua 

 panicle, yellowish-white. Perhaps only a variety of the former. 



5. P. tridentata Ait. : smoothish ; stem ascending, dichotomous ; 

 leaves ternate-palmate ; leafets obovate-wedgeforra, coriaceous, 3- 

 toothed at the summit, pubescent beneath ; stipules lanceolate, acumi- 

 nate; corymb loose, few-flowered ; petals oblong-obovate, longer than 

 the calyx. 



HAB. Mountains. Arc. Amer. to Car. June, July. L(. Stem 

 3 6 inches high. Flowers white. 



** Leaves digitate. 



4. P. cantuknsis Linn. : silkly villous ; stem procumbent and ascend- 

 ing, somewhat branched ; leaves quinate-palmate ; leafets obovate- 

 wedgeform, acutely dentate; stipules lanceolate, somewhat obtuse; 

 peduncles solitary, elongated ; lobes of the calyx linear-lanceolate, 

 acute, nearly equalling the corol ; petals obovate, entire. 



HAB. Fields and woods. Can. to Car. April, May. If. Stem 

 38 inches high. Flowers yellow. Receptacle hairy. 



Five-finger. 



5. P. simplex Mich. : stem sarmentose, simple, hairy ; leaves qui- 

 nate, petioled ; leafets ovate- lanceolate, acutely toothed, a little hairy 

 beneath ; stipules lanceolate, entire ; peduncles lateral, solitary, elon- 

 gated, 1-flowered ; lobes of the calyx lanceolate-linear, mucronate, a 

 little shorter than the roundish obcordate petals, P. sarmentosa Willd. 

 * P. carolinuma Poir. 



