138 
TETRAD YNAMIA SILICULOSA. 
Root annual. Stem erect, with expanding branches, slightly angled to- 
wards the summit. Leaves alternate, not glaucous, the upper ones lance- 
olate, the lower almost hastate. Fioivers in terminal racemes, but forming 
corymbose clusters when they first begin to expand ; common peduncle 1 
—3 inches, the partial 2 — 3 lines long. Calyx 4-leaved, deciduous; leaf- 
lets linear lanceolate, slightly gibbous at base. Corolla cruciform. Pe- 
tals 4, obcordate, white, with claws a little longer than the calyx. Ft la- 
ments 6, of which 2 are shorter than the others. Germ superior, slightly 
compressed, jointed below the middle. Style 0. Stigma thick. Glands 
4, two at the base of the shorter filaments, and one between the base of 
each longer pair. Pod 2-jointed, without valves. Seed 1 in each joint, 
oval, glabrous. 
Grows in the drifting sands along the margins of the ocean. Cultiva- 
ted sometimes for the table, and much commended. 
Flowers April — July. 
DRAB A. Gen. Pl 1076. 
Silicula integra, o- 
vali-oblonga, valvis 
planiusculis, dissepi- 
mento parallels. 
1. Caroliniana. 
D. foliis ovali-lan- 
ceolatis, hirsutissimis; 
ramulis floriferis nu- 
dis ; siliculis longo- 
linearibus, glabris, ap- 
proximatis. 
Walt. p. 174. Nutt. 2. p. 62. 
D. hispidula. Mich. 2. p. 28. 
Pod entire, ovai 
oblong ; valves some- 
what flat, parallel with 
the partition. 
Leaves oval lance- 
olate, very hairy ; 
flower bearing stems 
naked ; pods linear, 
glabrous, approxi- 
mate. 
Fursh 2. p. 433. 
Root annual. Stem very short, covered like the leaves with a stellular 
pubescence, and divided almost at the surface of the earth into 4 or 5 na- 
ked flower bearing branches, each about 2 inches long. Leaves clustered 
on the stem, small, more or less acute, and covered with a stellular pubes- 
cence. Flowers on the summit of the branches. Calyx 4 leaved, deci- 
duous. Corolla 4-petalled, oblong, with a base tapering to a claw, white, 
in the later florets probably wanting. Stamens half as long as the petals. 
Style very short. Stigma quadrifid. Pod 3 — 4 lines long, linear lanceo- 
late. Seeds many. Dissepiment generally persistent. 
