ROSACEA. (rose family.) 131 



globose ; stone slightly compressed. — Dry light soil, Florida and Alabama 

 to South Carolina. Feb. - March. — A shrub or small tree. Branches purple, 

 shining. Leaves I'-l^' long. Plum rarely^' in diameter, dark purplish 

 or black, sour and bitter, ripening in August. 



3. P. Chicasa, Michx. Leaves thin, lanceolate or oblong-lanceulate- 

 acute, smooth, minutely and sharply serrate, with the teeth glandular and 

 incurved ; flowers short-peduucled ; calyx smooth ; drupe yellowish red, glo- 

 bose. — Old fields, forming thickets. March. — A shrub or small tree. 

 Leaves l^'-2' long. Plum about ^' in diameter, thin-skinned and of an 

 agreeable flavor. 



4. P. gracilis, Gray & Engelm. Low and bushy, the pubescent branches 

 often spiny ; leaves short-petioled, ovate, acute, unequally serrate, glabrate 

 above, pale and villous beneath, V-2' long; clusters 2-3-flowered; calyx 

 pubescent; drupe, globose, 6" - 9" in diameter. — Lookout Mountain, Tennes- 

 see ( Gattinger), and westward. 



5. P. maritima, Wang. Low and straggling, spineless ; leaves ovate or 

 obovate, acute or acuminate, sharply serrate, glabrate ; clusters few-flowered ; 

 drupe red or purplish, \' in diameter. — Alabama {Buckle i/). 



§ 2. Cerasus. (Cherry.) — Drupe not glaucous: stone globular or slightly 



compressed : leaves folded in the bud, deciduous. — Spineless shrubs or trees. 



* Flowers clustered. 



6. P. Pennsylvanica, L. Leaves thin, ovate-lanceolate, acuminate, 

 finely and sharply serrate, green and smooth on both sides; flowers several 

 in a cluster, on long peduncles ; drupe globose, light red. — Mouutains of 

 North Carolina. May. — A small tree. Fruit small and sour. 



* * Flowers in racemes terminating leafy branches. 



7. P. serotina, Ehrhart. Leaves smooth, varying from oval to ovate, 

 lanceolate, mostly acute or acuminate, serrate, with the teeth callous and 

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

 April - May. — A tree 20° - 60° high. 



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

 leaves, brandies, and racemes more or less pubescent ; leaves thin, oval, 

 oblong or obovate, finely and sharply serrate, abruptly acute or acumi- 

 nate ; racemes rather short and erect ; drupe red. -^ Light sandy soil in the 

 upper districts. April. — Shrub 3° -9^ high. Leaves l'-3' long. Drupe 

 astringent. 



§3. Laurocerasus. (Cherut Laurel.) — Drupe not glaucous : stone 

 globular : flowers in racemes from ihc axils of evergreen leaves. 



9. P. Caroliniana, Ait. (Mock Orange.) Leaves coi-iaceous, smooth 

 and glossy, ovate-lanceolate, acute, mostly entire ; racemes shorter than the 

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

 North Carolina, and westward. Feb. - March. — A small tree. 



10. P. sphserocarpa, Swartz. Racemes small, erect, shorter than the 

 leaf; leaves elliptical, entire, shining; flowers scattered; drupe sub-globose. 

 — Key Biscayne (Curtiss), South Florida. — A small tree, 10° -15° high. 



