152 ROSACE^E. (ROSE FAMILY.) 



minate, finely and sharply serrate, softly pubescent when young, glabrate with 

 age ; fruit globose-ovoid, very dark purple with a bloom (less than \' in diameter) ; 

 stone turgid, a shallow groove on one side and a broad flat ridge on the other. 



Bluffs of the Alleghany Mts., Penn. 



4. P. Chicasa, Michx. (CHICKASAW PLUM.) Stem scarcely thorny 

 (8-15 high) ; leaves nearly lanceolate, Jinely serrulate, glabrous ; fruit globular, 

 red, nearly destitute of bloom (|- f in diameter) ; the ovoid stone almost as 

 thick as wide, rounded at both sutures, one of them minutely grooved. 

 Md. to Fla., west to S. Ind., Kan., and Tex. 



5. P. gracilis, Eugelm. & Gray. Soft-pubescent, 1 -4 high ; leaves oblong- 

 lanceolate to orate, acute, sharply serrate, becoming nearly glabrous above, 1-2' 

 long; pedicels and calyx pubescent ; fruitless than %' in diameter; stone rather 

 turgid, suborbicular. Prairies and sandy places, S. Kan. to Tex. and Tenn. 



6. P. pumila, L. (DWARF CHERRY. SAXD C.) Smooth, depressed 

 and trailing (6' -6 high); leans obovate-lanceolate, tapering to the base, some- 

 what toothed near the apex, pa/e underneath; flowers 2-4 together; fruit 

 ovoid, dark red or nearly black when ripe, without bloom ; stone ovoid, mar- 

 ginless, of the size of a large pea. Rocks or sandy banks, N. Brunswick to 

 Va., west to Minn, and Kan. Fruit usually sour and astringent. 



7. P. Pennsylvanica, L. f. (WILD RED CHERRY.) Tree 20 -30 high, 

 with light red-brown bark; leaves oblong-lanceolate, pointed, finely and sharply 

 s< rrate, shining, green and smooth both sides ; flowers many in a cluster, on long 

 pedicels; fruit globose, light ml, very small, with thin and sour flesh; stone 

 globular. Rocky wu<>ds, Xewf. to X. C., west to Minn, and Mo. 



P. spixbsA, L. (SLOE. BLACKTHORN.) Branches thorny ; lea ves obovate- 

 oblonrj or ovate-lanceolate, sharpli/ s/ rrate, at lenqth glabrous ; pedicels glabrous ; 

 fruit small, globular, black with a bloom, the stone turgid, acute on one edge. 

 - Var. iNSiTfiiA (BULLACE-PLTM), is less spiny, the pedicels and lower side 

 of the leaves pubescent. Roadsides and waste places, N. Eng. to Penn. and 

 X. J. (Adv. from Eu.) 



2. PADl'S. Drupe small, globose, ivithout bloom; the stone turgid-ovate, mar- 

 ginless ; flowers in racemes terminating leafy branches, therefore appearing 

 after the leaves, late in spring. 



8. P. Virginiana, L. (CHOKE-CHERRY.) A tall shrub, with grayish 

 bark ; leaves oval, oblong, or obovate, abruptly pointed, very sharply (often doubly) 

 serrate ivith slender teeth, thin ; petals roundish ; fruit red turning to dark crim- 

 son; stone smooth. River-banks, Newf. to Ga., west to Minn., E. Neb., and 

 Tex. Fruit very austere and astringent. A variety with very short dense 

 racemes and sweeter yellowish fruit has been found at Dedham, Mass. 



9. P. serbtina, Ehrh. (WILD BLACK CHERRY.) A large tree, with 

 reddish-brown branches; leaves oblong or lanceolate-oblong, taper-pointed, serrate 

 with incurved short and callous teeth, thickish, shining above ; racemes elon- 

 gated ; petals obovate ; fruit purplish-black. Woods, N. Scotia to Fla., west 

 to Minn., E. Neb., and La. Fruit slightly bitter, but with a pleasant vinous 

 flavor. 



10. P. demissa, Walp. Low but tree-like in habit, 3-12 high, resem- 

 bling n. 8 in foliage, but the leaves rather thick and the teeth less slender ; ra- 

 cemes often elongated; fruit purplish-black, sweet and but slightly astringent. 



Central Kan. and Neb. to New Mex., Dak., and westward. 



