120 ROSACEA, (rose family.) 



lJ'-2' lotifT. Tliini !il)(nit y in (liaincttT, tliin-skitiiu'd and of an agreeable 

 flavor. 



§ 2. Cerasi'S. (Ciieuky.} — DruiK not (jlaucous : stone </lohular or digldly com- 

 pressed: Itaves folded in the hud, deciduous. — Sj>ineless shrubs or trees. 

 * Flowers clustered. 



4. P. Pennsylvanica, L Lfavesthin.ovatc-lanccolatc, acuminate, finely 

 and sliarply f^enate, green and smooth on both sides ; flowers several in a cluster, 

 on long peduncles ; drupe globose, light red — Rocky woods, North Carolina, 

 and northward. May. — A small tree. Fruit small and sour. 



* * Flowers in racemes ierminatinr/ hafij branches. 



5. P. serotina, Ehrhart. Leaves smooth, varying from oval to ovatc- 

 lanecolate, mostly acute or acuminate, serrate, with tlic teeth callous and ap- 

 presscd; racemes long, spreading; drupe globose, purplish-black. — Woods, 

 Florida to Mississippi, and northward. April and May. — A tree 20° - 60° high. 



6. P, Virginiana, L. Smooth throughout, or the lower surface of the 

 leaves, branches, and racemes more or less pubescent ; leaves thin, oval, oblong 

 or obovate, finely and sharply serrate, abruptly acute or acuminate ; racemes 

 rather short and erect ; drupe red. (P. hirsuta. Ell. ?) — Light sandy soil, Geor- 

 gia and northward. April. — Shrub 3° -9° high. Leaves 1'-, 3' long. Drupe 

 astringent. 



§ 3. Laurocerasds. (Ciierry-Lavrel ) — Drupe not glaucous : stone (jlohukir : 

 Jlnwers in racemes from the axils of evergreen leaves. 



7. P. Caroliniana, Ait. (Mock Orange.) Leaves coriaceous, smooth 

 and glossy, ovatelaiiceolate, acute, mostly entire ; racemes shorter than the 

 leaves, white ; drupe ovoid, soon dry, black. — Banks of rivers, Florida to North 

 Carolina, and westward. February and March. — A small tree. 



3. SPIRiEA, L. Mkadow-Swekt. 



Calvx .5-clcft, persistent. Petals .'J, roundish, iniliricated in the bud. Stamens 

 10-. 50. Follicles 3- 12, 1 - 10-seedeil. Styles terminal. — Shrubs or perennial 

 herbs, with simple or compound leaves. Flowers white or rose-color, sometimes 



dia'cious. 



* .Shrubs : /lowers perfect. 



■(- Flowers corymbose. 



1. S. opulifolia, L. Leaves broadly ovate or cordate, 3-lobcd, doubly 



crenatc-serrate, smooth ; corymbs umbellate, terminating the short branches, 



mostly pubescent ; follicle smooth, inflated, 2-4-sceded. — Var. kerriioinea, 



Nutt. Leaves smaller (1' long), slightly lobed, covered, like the branches, 



corvmbs, and follicles, with a dense brownish pubescence. — Banks of streams, 



Florida and Alabama (the variety) to the mountains of Georgia, and northward. 



April and May. — Shrub 3° -5° high, the old bark separating in Uuu layers. 



Flowers white. 



-I- ■*- Flowers panicled. 



2. S. tomentosa, L. Leaves simple, ovate or oblong, serrate, the lower 

 surface, like the branches and close panicle, covered with a dense, rust-colored 



