124 ROSACK/K. (BOSK FAMILY.) 



shorter than tin; calyx. (I);ililmnl;i lobata, Bakhff.) — Banks of the Flint and 

 Chattahoochee rivers, in the middle districts of Georgia, not common. May 



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



11. POTENTILLA, L. Cinquefoil. 



Calyx flat, 5-cleft, with as many bracts. Petals . r ), obcordate or roundish. 



Stamens nnmeroiis. Style lateral or terminal, deciduous. Achcnia collected 

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

 variously divided leaves. Flowers solitary or cymosc. 

 * Style terminal, or neurit/ so. 



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

 mately 3-foliolate, the leaflets obovate-oblong or lanceolate, coarsely serrate ; 

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

 places. Introduced, and sparingly naturalized. — Stem 1° - 2° high. 



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

 simple; leaves palmately 5-foliolate ; leaflets obovate-oblong, coarsely serrate; 

 (lowers axillary, solitary, on long filiform peduncles ; petals yellow, obcordate, 

 as long as the calyx. (P. simplex, Michx.) — Meadows in the upper districts, 

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

 l°-3° long. 



* * Style lateral. 



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

 cending, pubescent ; leaves rigid, trifoliolatc, cuneate-oblong, 3-toothed at the 



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

 July. — Stem .V - 10' high. Achcnia and receptacle very hairy. 



12. FRAGARIA, Tourn. Strawbebrt. 



blowers like Potentilla, but the dry achcnia borne on the enlarged, at length 

 pulpy and scarlet receptacle. Style lateral. — Perennial herbs with creeping 

 runners. Leaves radical, trifoliolatc. Flowers white, in terminal cymes. 



1. F. Vil'giniana, Ehrhart. Hairy ; leaflets oblong, coarsely serrate ; 

 Bcape few-flowered ; fruit roundish, the achcnia imbedded in the deeply pitted 

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

 April. — Scapes 4'-G' high. 



13. RUBUS, L. Brier. Bramble. 

 Calyx concave or flattish, 5-partcd, without bracts. Petals 5, deciduous. 



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

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

 prickly plant-, with lobed or compound petioled leaves, and white or reddish 



flowers. 



* J l, nth of 'achenia hemispherical, deckhoui i receptacle dry. 

 l. It. odoratus, L. Shrubby, not prickly; the branches, petioles, and 



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



