756 Asclepiadaceae. 
dhe.. p.54 tab. 20 fig. 3. — Sarcostemma pyrotechnicum Roem. 
and Schult. Syst. VI, p.116. — Microloma pyrotechnicum Spreng. 
Syst. I, p. 855. — A much branched leafless bush (rarely with leaves 
on the young shoots), attaining a height of 1—3 m; trunk 8 to 
12 cm thick; branches erect, slender, terete, straight, puberulous on 
the tips of the growing shoots, soon becoming glabrous; 1—2 nodes 
at the growing apex alone provided with minute subulate leaves 
2—5 mm long, which soon fall away, or rarely remain on the young 
shoots and grow out to 2—5 cm long, jaa mm broad, linear, 
acute. Umbels subaxillary, several- flowered: flowers successively 
developing so that a short floral axis up to 5 mm long is some- 
times formed; peduncles 2—5 mm long; pedicels [22055 mm long, 
puberulous. Calyx 1,5 mm long, 5-lobed to the middle, puberulous; 
lobes ovate, subacute. Corolla 5—5’/, mm in diam., subrotate; 
tube funnel-shaped, as long as the calyx; lobes 2,5 mm long, ovate, 
acute, thickened in the apical half, slightly reflexed along the margins, 
glabrous outside, pubescent inside, with the tube and a central line 
at the base of the lobes glabrous. Coronal-lobes at the sinuses of 
the corolla very small, fleshy, tubercle-like or semicircular, pubes- 
cent at the apex; staminal-corona minute, annular, close to the base 
of the 1 mm long staminal-column. Follicles 6*/,—8'/, em long, 
5 mm thick, terete, attenuate into a long beak. Seeds 8 mm long, 
—2'/, mm broad, narrowly lanceolate, plano-convex, glabrous. — 
ate, December to May. 
D. 1. Es-Sabrigél; Beni Selama; Kafr Hakim; Abu Roash; 
Pyramids of Zawiyet-el- Aryan; Pyramids of Abusir. — D. a. sept. 
Serapeum; Bir-Suez; Tura; Great Petrified Forest. — D. a. mer. 
Qoseyr. 
Local name: markh. 
Extends through the Sahara, Tropical Africa, Arabia into the drier 
parts of India. 
432. (10). Caralluma. 
Calyx 5-partite. Corolla rotate, broadly cup-shaped or with a 
distinct campanulate or subglobose tube, 5-lobed; lobes varying 
from broadly ovate to linear- attenuate, valvate in bud. Corona 
double, arising from the staminal-column; outer corona sometimes 
annular or cup-shaped, entire, crenulate, denticulate, 5—10-(rarely 20) 
toothed or lobulate, adnate to the backs of the inner coronal-lobes 
at their base or connected to them by narrow partitions; sometimes 
of 5 lobes more or less adnate by their margins to the sides or 
backs of the inner coronal-lobes forming 5 small pouch-like cavities 
alternating with the anthers, or spreading, rarely quite free to the 
