ORDER XLIV. ROSACEA. 299 



1. P. America 'na, (Marsh.) Stem smooth, with long, flexible branch- 

 es ; the old branches somewhat rough and thorny. Leaves ovate or 

 oblong-ovate, acuminate, sharply serrate, veined beneath ; petioles with 

 two glands, nearly glabrous when old. Flowers in umbels, 2—5. Seg- 

 ments of the calyx lanceolate. Fruit a roundish drupe, reddish when 

 ripe, large, with a tough skin. — White. ^ . March and April. Along 

 the banks of streams. 15 — 20 feet. Yellow Plum. Red Plum. 



2. P. Chica'sa. Branches thorny. Leaves oblong-lanceolate or ob- 

 lanceolate, acute, serrulate. Umbels 2 — 3-flowered ; calyx usually gla 

 brous, sometimes pubescent. Drupe globose, red. Chickasaw Plum 



3. P. mariti'ma, (Wang.) A low shrub. Leaves oval or ovate, acu 

 minate, finely serrate. Umbels few-flowered. Fruit nearly globular 

 covered with bloom, red or purple ; pleasant to the taste. — White. ^ . 

 March and April. On the sea-coast. 



Genus III— AMYG'D ALUS. Tourn. 11—1. 

 (From the Greek amusso, to lacerate, in allusion to the appearance of the stem.) 



Calyx 5-cleft, inferior. Petals 5. Fruit a drupe. Peach. 



1. A. Per/sica, (L.) Leaves lanceolate, serrate ; serratures acute. Flow- 

 ers sessile, solitary. — Red. ^. Feb. — March. The Flowering Almond 

 is the A. nana. 



Genus IV.— CER/ASUS. Juss. 11—1. 

 (From Cerasus, a town in Pontus, Asia) 



Calyx inferior, campanulate, 5-cleft. Petals 5-spreading. 

 Stamens numerous. Drupe globose ; nucleus smooth. Leaves 

 conduolicate in vernation. Cherry. 



1. C. Virginia'na, (D. C.) A tree with smooth branches, or small 

 shrubs with grayi?h bark. Leaves broadly oval or oblong-lanceolate, 

 mucronate, seriate, or entire ; petioles glandular. Flowers in axillary 

 racemes, short, erect; s-egments of the calyx acute, whitish. Petals 

 neaily orbicular. Fruit a dark red, globular drupe, very astringent. — 

 White. * . March— April. Near Columbia, S. C. 10—30 feet. 



Choke Cherry. 



2. C. seroti'na, (D. C.) A large tree, with spreading, smooth branch- 

 es. Leaves oval, lanceolate, acuminate, generally glabrous, somewhat 

 lucid, serrate ; petioles with glands. Flowers in elongated racemes. 

 Petals nearly orbicular. Drupes nearly black, eatable. — White. "£ . 

 April — May. In rich soils. 30 — 80 feet. Wild or Black Cherry. 



3. C. Carolinia'na, (Mich.) An evergreen tree of ornamental growth. 

 Leaves oblong-lanceolate, slightly acuminate, mucronate, entire, or ser- 

 rate, coriaceous, shining above ; petioles short. Flowers in dense ra- 

 cemes, from the axils of the leaves of the preceding season. Petals 

 small, obovate. Stamens long. Drupe black, persistent, dry. — White. 

 ^. March — April. On the Congaree, near Columbia. Middle Geo. 



Sub-Order III.— ROSA'CE^E. 



Calyx inferior, 3 — 5-cleft. Ovaries solitary or several. Fruit 

 follicular, 1 — 10-seeded, or achenia. 



