124 EOSACEiE. (rOSK FAMILY.) 



shorter than the calyx. (Dalibarda lobata, Baldw.) — Banks of the Flint and 

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

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



U. POTENTILLA, L. Cinquefoil. 



Calyx flat, 5-cleft, with as many bracts. Petals 5, obcordatc 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 cymose. 

 * Sit/le terminal, or nearly 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-foIiolate ; leaflets obovate-oblong, coarsely sen'ate ; 



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



as long as the calyx. (P. simplex, Mklix.) — 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, trifoliolate, cuneate-oblong, 3-toothed at the 

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

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



■ ' ' f 



12. FRAGARIA, Toura. Steawbekry. 



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

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

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



1. F. Virginlana, Ehrhart. Hairy ; leaflets oblong, coarsely serrate ; 

 scape fow-flowercd ; fruit roundish, the achenia imbedded in the deeply pitted 

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

 April. — Scapes 4' -6' high. 



13. RITBUS, L. Beier. Br.\mble. 



Calyx concave or flattish, 5-parted, 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 plants, with lobed or compound petioled leaves, and white or reddish 

 flowers. 



* Heads of achenia hemispherical, deciduous : receptacle dry. 



1. R. odoratus, L. Shrubby, not prickly; the branches, petioles, and 

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



