98 ROSACEiE. 



stipules laciniate; peduncles l-flowered; sepals not bristly. D. violccoida 

 Mich. Rubus Dalibarda Linn. 



Moist shady places. Can. N. Eng. N. Y. and Fenn. June— Aug. 71.— 

 Stem herbaceous, creeping and rooting. Leaves on long petioles, with a deep 

 and often closed sinus at the base. Flowers solitary, white, on long nearly 

 radical peduncles. Creeping; Dalibarda. 



8. FRAGARIA. Tb^mi.— Strawberry. 

 (From the LaXin fragrans ; on account of its fragrant fruit.) 

 Calyx with the tube concave, 5-cleft, and with 5 bracts with- 

 out, (or 10-cleft.) Petals 5. Stamens man}^ Carpels naked, 

 fixed on a long pulpy deciduous receptacle. Style lateral. 



1. i^, Virgiiiiana Linn. : leafets broad-oval, smoothish above, the late- 

 ral ones distinctly petioled ; peduncles usuaHy shorter than the leaves ; fruit 

 ovoid ; achenia imbedded in the receptacle. F. Canadensis Mich. 



Fields and meadows. Throughout the U. S. Can. and Arct. Amer. to lat. 64°. 

 May. %. — Flowers white. F. Canadensis Mich, is the larger form of this spe- 

 cies, and appears in some situations to be quite constant. This is the case at 

 Little Falls, N. Y. Wi7J Strawberry. 



2. F. vesca Linn. : lobes of the leaves plicate, thin, pilose beneath ; pe- 

 duncles usually longer than tlie leaves; fruit conical or hemispherical; 

 achenia superficial. 



Fields. N. S. Subarct. Amer. and N. W. Coast. April, May. 71-.— More 

 stoloniferous than the former, and the carpels not imbedded in the receptacle. 

 There are several cultivated varieties. Common Strawberry. 



9. POTENTILLA. imn.- Cinquefoil. 

 (From the Latin potens, powerful ; in allusion to its supposed medicinal virtues.) 



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

 without (or 8 — 10-cleft). Petals 4 — 5, obtuse or obcordate. 

 Stamens many. Carpels many, roundish, rugose, naked, fixed 

 to a small dry receptacle, 



* Leaves ternate or quinate-palmate. 



\. P. Norvegica Linn. : hirsute; stem erect, dichptomous above ; leaves 

 ternate-palmate ; leafets lanceolate or obovate, simply and doubly serrate ; 

 stipules lanceolate ; flowers numerous, subcorymbed and axillary ; petals 

 obovate, slightly emarginate, shorter than the calyx. P. hirsute Mich. 



Old fields and pastures. Can. to Car. N, to Arct. Amer. June — Aug, ®, — 

 Stem 1 — ^2 feet high, hirsute, at length more or less branched. Lower leaves on 

 petioles 1 — 4 inches long. Flowers yellow, in leafy cor^Tubs at the top, and on 

 long solitary peduncles below. Norway Cinquefoil. 



2. P. tridentata Ait. : stems ascending, woody and creeping at base ; 

 leaves ternate-palmate; leafets obovate-wedgeform, coriaceous, 3-toothed 

 at the end, pale pubescent beneath ; stipules lanceolate, acuminate ; co- 

 rymb loose, few-flowered ; petals oblong-ovate, longer than the calyx. 



Mountains. Arct. Amer. to Car. June, July. %.—Stem 4—10 inches high. 

 Leafets sometimes 4— 5-toothed. Flowers 6 — 3 in the summit of each stem, 

 wldte or reddish- white. Three-iooihed Cinqupfoil. 



