400 LXXXV. ASCLEPIADEZ (BROWN). [ Cynanchum. 
staminal-column by 5 short septa. Anther-appendages broad and 
rounded, inflexed over the margin of the truncate style-apex. Follicles 
solitary (always ?) 2 in. long, 3-34 lin. thick, terete, acuminate, smooth, 
glabrous. Seeds flattened, 1 in. long, ovate, softly pubescent on both 
sides.—C. sarcostemmoides, K. Schum. in Engl. & Prantl, Pflanzenfam. 
iv. ii. 252. Sarcostemma aphyllum, R. Br. in Mem. Wern. Soc. 1. 50,. 
partly ; Decne. in DC. Prod. viii. 538; K. Schum. in Engl. & Prantl, 
Pianzenfam. iv. ii. 256. Asclepias aphylla, Thunb. Fl. Cap. ed Schult. 
234 partly, as confirmed by one of the three specimens in his herbarium. 
Sarcostemma tetrapterum, Turez., and Monostemma tetrapterum, Turcz., 
& M. aphyllum, Turcz. in Bull. Soc. Mose. 1848, i. 255. Sarcocyphula 
Gerrardi, Harv. Thes. Cap. ii. 58, t. 191. 
Mozamb. Dist. Zanzibar, Kirk/ Namiqua Island, Hutton! German 
East Africa : Usambara, Amboni, Holst, 2706! Pare Mountains, Volkens, 2375. 
Portuguese East Africa: by the River Zambesi, opposite Sena, Kirk, 102! 
Also in South Africa. 
Vincetoxicwm sarcostemmoides, Schweinf. ex Penzig in Atti del Congr. Bot. 
Internaz. 1892, 349, from hills to the south of Geleb, in Eritrea, may belovg here, 
but there is no description. 
Imperfectly known species. 
16. ©. defoliascens, K. Schum in Ann. Istit. Bot. Roma, vu. 
38. A shrub; stem 23-4} lin. thick; branches slender, flexuose, 
glabrous, becoming leafless. Leaves }-2 in. long, searcely exceed- 
ing 1 lin. in breadth, linear, acute, narrowed at the base into a 
very short petiole, recurved along the margins, somewhat fleshy, 
glabrous. Umbels pedunculate, few-flowered ; peduncle about 43 lin. 
long, filiform, glabrous; pedicels 1-24 lin. long, slender, glabrous. 
Sepals 1 lin. long, subulate, glabrous. Corolla about 2 lin. in diam., 
rotate, glabrous, whitish-green. Coronal-lobes about 4 lin. long, free 
nearly to the base, spathulate, a little shorter than the staminal- 
column, which is $ lin. long. 
Wile Land. Somaliland: on a dry plain, near Mandah, Robecchi-Bricchettt 
110. 
From the description I very much doubt if this plant, which I have not seen 
belongs to the genus Cynanchum. 
17. C. Dewevrei, De Wild. & Durand, Contrib. Fl. Congo, i. ii. 4- 
Stem twining, terete, tomentose. Leaves petiolate; petiole $1} in. 108: 
slender, pilose; blade 1-3} in. long, 4-14 in. broad, oblong-lanceolate, 
acute, cordate at the base, subentire, thinly pubescent above, tomentose 
beneath. Inflorescence from one axil (sublateral ?), umbellate or race- 
mose, many-flowered; peduncles shorter or slightly longer than the 
petioles, velvety; pedicels 11-21 lin. long, slender, velvety ; bracts 
minute, shorter than the pedicels, linear, pilose. Sepals about 4 lin. 
long, triangular-subulate, pilose. Corolla rotate, about 1 lin. long; 
divided almost to the base into 5 oblong lanceolate lobes, glabrous ©P 
