ROSACE.^.. (rose family.) 119 



1. CHRYSOBALAinjS, L. 



Calyx bell-shaped, 5-cleft, persistent. Petals 5. Stamens about 20 ; the in- 

 ner ones often shorter and sterile. Ovary with 2 collateral erect ovules ; the 

 style arising from its base. Drupe 1-seeded ; the stone grooved. — Low unarmed 

 shrubs. Leaves nearly sessile, entire, with minute stipules. Flowers small, in 

 axillary or terminal paniculate cymes. 



1. C. oblongifolius, Michx. Leaves somewhat coriaceous, oblong, nar- 

 rowed downward, mucronate, smooth on both sides, or hoaiy-pubescent beneath, 

 deciduous ; cymes terminal, racemose, many-flowered ; calyx pubescent ; sta- 

 mens and ovary smooth ; drupe ovoid. — Dry sandy pine barrens, Florida, Ala- 

 bama and Georgia. May. — Stems creeping, the flowering branches 6' - 12' high. 

 Leaves 3' - 4' long. Flowers greenish- white, mostly abortive. 



2. C. Icaco, L. (Cocoa Plum.) Leaves short-petioled, round-obovate, 

 mostly emarginate, smooth, coriaceous ; cymes axillary, few-flowered, shorter than 

 the leaves ; calyx pubescent and hoary ; stamens and ovary hairy ; drupe large 

 roundish. — South Florida. — Shrub 4° - 6° high, the stem and branches rough- 

 ened with small white tubercles. Leaves 2' long, 1|' wide. Drupe yellow, pur- 

 ple, or black. 



2. PRUNUS, L. Plum. Cherry. 



Calyx .5-clcft, deciduous. Petals 5, spreading. Stamens 1.5-30. Ovary 

 with 2 collateral suspended ovules. Style terminal. Drupe fleshy; the stone 

 even. — Trees or shrubs. Leaves simple. Flowers white. 



§ 1. Prunus. (Plum) — Drupe glaucous: stone more or less compressed : leaves 

 convolute in the bud : Jlowers in lateral clusters, appearing before tlie leaves : 

 branches often spiny. 



1. P. Americana, Marsh. Leaves thick, ovate or somewhat obovate, acu- 

 minate, rounded or slightly cordate at the base, pubescent beneath, sharply ser- 

 rate, on glandular petioles ; drupe large, globose. (P. hiemalis, Ell.) — Woods, 

 Florida to Mississippi, and northward. March and April. — A small tree. 

 Leaves 2' -3' long, smooth when old. Flowers very numerous. Plum reddish, 

 ^'-1' in diameter, pleasantly acid, ripening in September. 



2. P. umbellata, Ell. Leaves thin, ovate-lanceolate or oblong, acute at 

 both ends, or the upper ones rounded at the base, finely and sharply serrate, 

 smooth or soft-downy beneath; calyx-teeth emarginate, pubescent; drupe glo- 

 bose ; stone slightly compressed. — Diy light soil, Florida and Alabama to South 

 Carolina. February and March. — A shrub or small tree. Branches purple, 

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

 black, sour and bitter, ripening in August. 



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

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

 curved ; flowers short-peduncled ; calyx smooth ; drupe yellowish-red, globose. 

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



