CLASS XII. ORDBR III.J POTENTILLA. 745 



lanceolate, with a long narrow point, the upper ones often cut. Flowers 

 few, white, on round short pedicles^ hairy. Calyx hairy, the inter- 

 mediate segments smaller than the inner ovate acute ones. Petals 

 oblong, entire, longer than the calyx. Receptacle hairy. Carpels 

 smooth, with a tuft of white hairs towards the apex. 



Habitat.—Wexvon Hill Clove, Scotland.— ilir. G. Don. 



Perennial; flowering in May and June. 



This remarkable species appears only to have been found in the 

 station above given, ft is, according to De Candolle, found also in 

 Canada and Greenland. 



11. P. Fragari'astrum, Ehrh. (Fig. 847) Stratvberry- leaved Cinque- 

 foil. Stem filiform, procumbent; leaves ternate; leaflets roundish 



ovate, deeply serrated, silky; stipules broadly ovate, acute, membra- 

 nous ; petals obcordate, as long or longer than the calyx ; carpels 

 smooth, villous at the base. 



English Flora, vol. ii. p. 425. — Hooker, British Flora, ed. 4. vol. i. 

 p. 207. — Lindley, Synopsis, p. 97. — P. fragaria, Poir. — De Cand. 

 Prod. 2. p. 585. — Fragaria sterilis^ Linn. — English Botany, t. 1785. 



Root woody, tapering, branched. Stems several, round, slender, 

 short, procumbent, the barren creeping ones leafy, not very long. 

 Leaves numerous, the lower and radical ones with rather long slender 

 footstalks, clothed like the stem with long silky spreading hairs, 

 leaflets three, roundish ovate, deeply serrated, dark green, and scattered 

 over with hairs above, paler and silky on the under side, with close 

 pressed hairs, the middle leaflet is mostly the largest, and the terminal 

 tooth is smaller than the others of all the leaflets. Stipules brown, 

 thin, membranous, ovate, acute, or with a lanceolate point. Flowers 

 seldom more than two, white, on round slender peduncles, hairy, as 

 well as the unequal ovate calyx segments. Petals obcordate, mostly 

 about as long as the calyx, sometimes longer. Receptacle hairy. 

 Carpels pale, kidney-shaped, smooth, with a few white hairs at the base. 



Habitat. — Woods, banks, and dry pastures; frequent. 



Perennial ; flowering in March and April. 



The general appearance of this species is that of a Fragaria^ but its 

 small dry receptacle at once distinguishes it from that genus. It is an 

 interesting plant, as showing how gradual are the links in the chain of 

 connection observable in the works of nature. 



2. Petals four. 



12. P. TormentiHla, Sibth. (Fig. 848.) Common Tormentil. Stem 

 ascending, dichotomous ; leaves sessile; leaflets three, oblong, wedge- 

 shaped, deeply serrated ; stipules deeply cut. 



Lindley, Synopsis, p. 98. — De Candolle, Prod. 2. p. 574. — Tormen- 

 tilla officinalis^ Sm. — English Botany, t. 863. — English Flora, vol. ii. 

 p. 428.— Hooker, British Flora, ed. 4. vol. i. p. 208.— r. erecta, Linn. 



