RHAMNACEAX. (BUCKTHORN FAMILY.) 73 
2. BERCHEMIA, Neck. SUPPLE-JACK. 
Calyx 5-cleft, the tube hemispherical. Petals 5, sessile, concave, as long as 
the calyx. Ovary free, 2-celled, half immersed in the fleshy disk. Styles united. 
Stigmas 2. Drupe oblong, 2-celled, 2-seeded. — Erect or twining shrubs, with 
alternate pinnately-veined leaves, with minute stipules, and small greenish axil- 
lary or panicled flowers. 
1. B. volubilis, DC. Stem twining; leaves oblong, acute, wavy on the 
margins, glossy above, the simple veins oblique ; flowers in small terminal pan- 
icles ; drupe purple. (Zizyphus volubilis, Willd.) — Swamps, Florida to North 
Carolina, and westward. June. 
3. SAGERETIA, Brongn. 
Calyx 5-cleft, the tube hemispherical, the lobes carinate within. Petals obo- 
vate, shorter than the calyx, concave. Ovary free, 3-celled. Stigmas 3, nearly 
sessile. Drupe baccate, composed of three even 1-seeded indehiscent nutlets. 
Seeds not grooved. Cotyledons flat. — Slender trailing shrubs, with opposite 
branches and leaves, and minute whitish spiked flowers. 
1. S. Michauxii, Brongn. Stem vine-like (6°-18° long), with spine- 
like spreading branches ; leaves (1/ long) nearly sessile, ovate or oblong-ovate, 
acute, finely serrate, smooth and shining, persistent ; spikes slender, interrupted, 
mostly panicled ; petals minute ; drupe dark-purple, globose. (Rhamnus minu- 
tiflorus, Michz.) — Dry sandy soil along the coast, — to North Carolina. 
September. — Drupes pleasantly acid. — 
. RHAMNUS, Tourn. BUCKTHORN. 
Calyx 4 —5-cleft, the tube urceolate, lined with a thin disk. Petals small, ob- 
ovate, concave, often wanting. Ovary free, 2—4-celled. Styles united below. 
Stigmas 2—4. Drupe baccate, composed of 2—4 somewhat dehiscent nutlets. 
Seeds grooved on the back. Raphe dorsal. Cotyledons leafy, revolute. — 
Shrubs, with alternate stipulate finely veined leaves, and small axillary clustered 
polygamous or dicecious greenish flowers. 
1. R. lanceolatus, Pursh. Leaves oblong-lanceolate, acute, or those of the 
flowering branches oblong and obtuse, serrulate ; flowers clustered, on short pedi- 
cels, with long styles, or the more fruitful ones scattered on longer pedicels, and 
with short styles; petals emarginate ; drupe 2-seeded. — Hills and river-banks, 
in the upper districts, Alabama and northward. June.— A tall shrub. Drupes 
black, as large as a grain of pepper. 
5. FRANGULA, Toum. 
Seeds not grooved. nan — Leaves venc Flow- | 
