Leptadenia. 755 
with twining or erect, rigid, much branched, rush-like stems. Leaves 
opposite or none, very variable in the same species. Cymes umbel- 
like, lateral between the bases of the leaves or subaxillary, sub- 
sessile or pedunculate, many-flowered; flowers small. 
Species 5 or 6 in Africa; one of the African species extends through 
Egypt into Arabia and India, besides 1 other in India and 1 in Madagascar. 
A TBE, GWAINPTS scoop. 9c dees lakes Doteet Ore ah <P ks| bE: 1. L. heterophylla. 
Beibeatless SHrubsi .pt uae acatsth-mreeeis 3. eke 2. L. pyrotechnica. 
1056. (1.) Leptadenia heterophylla Decsne. in Ann. Science. 
Nat., 2. ser. Vol. IV (1835) p. 270. — Boiss. Flor. Or. IV, p. 1197. 
— Aschers.-Schweinf. Illustr. Flor. d@’Eg., p.105 no. 689. — Lepta- 
denia Forskalei Decsne. in Ann. Sciene. |. ¢, p. 269 tab. X. — DC. 
Prodrom. VIII, p. 628. — Leptadenia abyssinica Decsne. in DC. Pro- 
drom. VIII, p.628. — Leptadenia Delilei Decsne. in DC. Prodrom. VIII, 
p.628, — Cynanchum heterophyllum Del. Cent. Plant. Afr. Voy. Meroe, 
p.47 tab.63 fig.4. — Stem twining, glabrous. Leaves very variable; 
petiole 5—25 cm long; blade 1—6 cm long, 0,5—2 cm broad, some- 
times linear or linear-lanceolate, acute or acuminate, with a hastate 
base and rounded auricles, but usually varying from lanceolate or 
ovate and acuminate at the apex, to elliptic, obtuse and apiculate 
or acute at the apex, cuneate, rounded, subtruncate or cordate at 
the base, glabrous on both sides. Umbels subaxillary, sometimes two 
from the same node, pedunculate, several-flowered; peduncles 5 to 
12 mm long, glabrous; pedicels 6—9 mm long, minutely puberulous. 
Calyx campanulate, 8 mm long, puberulous, 5-lobed to half way 
down; lobes ovate, acute. Corolla 5—6 mm in diameter; tube as 
long as the calyx; lobes 2—3 mm long, very spreading, oblong- 
ovate or linear-lanceolate, subacute, somewhat keeled on the apical 
half, slightly reflexed along the margins, canescent on the back, 
pubescent on the face, except a median depressed, glabrous line 
at their base. Coronal-lobes inserted at the sinuses of the corolla, 
minute, fleshy, rounded, glabrous, dorsally tipped with a tuft of 
rather long hairs. Follicles solitary, 5—8 cm long, 8—10 mm thick, 
lanceolate, obtusely acuminate, smooth, glabrous. Seeds 5—6 mm 
long, narrowly ovate-lanceolate, concave-convex, glabrous. — Flow. 
March to April. 
N. v. mer. Islands near Aswan. 
Also known from Tropical Africa and Arabia. 
1057. (2). Leptadenia pyrotechnica (Forsk.) Decsne. in Ann. 
Science. Nat., Ser. 2 Vol. IX p. 269—270. — Boiss. Flor. Or. IV, p. 63. 
— Aschers.-Schweinf. Ill. Flor. d’Eg., p. 105 no. 688. — Cynanchum 
pyrotechnicum Forsk. Flor. aeg.-arab., p.53. — Delile [llustr. Flor. 
48* 
