124 ROSACKyK. (itOSK I A^III.V.) 



shorter than tlic calyx. (Dalibanla loliata, Buldw.) — Banks of the Flint and 

 Chattahooclu'c rivers, in tlie uiiildle distriets of (Jeoryia, not eoninion. May 

 and June. — Scape and leaves 4'- 8' high. 



11. POTENTILLA, L. Cixqukfoil. 



Calyx flat, 5-cleft, with as many l)racts. Petals .5, ol)conlate or roundish. 

 Stamens numerous. Style lateral or terminal, deciduous. Achenia collected 

 in a head on the dry and pubescent receptacle. — Herbs or shrubby plants, with 

 variously divided leaves. Flowers solitary or cymosc. 



* Stijle terminal, or vearh/ so. 



1. p. Norvegica, L. Annual, hairy; stem erect, branched; leaves pal- 

 mately 3-foliolatc, the leaflets obovatc-oblong or lanceolate, coarsely serrate ; 

 flowers pale yellow, in leafy cymes ; petals shorter than the calyx. — Waste 

 places. Introduced, and s])aringly naturalized. — Stem 1° - 2° high. 



2. P. Canadensis, L. Perennial, hairy ; stem prostrate or ascending, 

 simple; leaves palmatcly 5-foliolate; leaflets ohovate-ohlong, coarsely serrate ; 

 flowers axillary, solitary, on long filiform peduncles ; petals yellow, obcordatc, 

 as long as the calyx. (P. simplex, il/iiV.Ax.) — Meadows in the upper districts, 

 Mississippi to Isortli Carolina, and northward. July and August. — Stem 



lo-3° long. 



* * Stijie lateral. 



3. P. tridentata, Ait. Stem somewhat shrubby at the base, erect or as- 

 cending, pubescent ; leaves rigid, trifoliolate, cuneateoblong, 3-tootlied at the 

 apex ; flowers white, in a terminal cyme. — High mountains of Xorth Carolina. 

 July. — Stem .5' - 10' high. Achenia and receptacle very hairy. 



12. FRAGARIA, Tourn. Straavherry. 



Flowers like Potentilla, hut the dry achenia borne on the enlarged, at length 

 pulpy and scarlet rcce])tacle. Style lateral. — Perennial herbs with creeping 

 runners. Leaves radical, trifoliolate. Flowers wliite, in tcrniiiial cymes. 



1. P. Virginiana, Ehrhart. Hairy ; leaflets oblong, coarsely serrate ; 

 scape fcw-flowcTod ; fruit roundish, the achenia imbedded in the deeply pitted 

 receptacle. — Rich woods, Florida to Mississippi, and northward. March and 

 April. — Scapes 4'-G' high. 



13. RUBXJS, L. Brikr. Bramble. 



Calyx concave or flatfish, .5-parted, without bracts. Petals 5, deciduous. 

 Stamens numerous. Achenia juicy, crowded on the conical or cylindrical re- 

 ceptacle. Style nearly tenninal, deciduous — Perennial or shrubby and mostly 

 prickly plants, with lobcd or compound petioled leaves, and white or reddish 

 flowers. 



* TTicuh nf achenia hetiiisp/ieriral, deciduous : receptacle dry. 



1. R. odoratUS, L. Sln-ubby, not prickly; the branches, petioles, and 

 corymbs hispid with glandular hairs ; leaves large, broadly ovate, 3-lobed, or 



