Oxystelma. | LXXXV. ASCLEPIADEE (BROWN), 383 
convex, not exceeding the anthers. Follicles 14-2 in. long, about 
5 lin. thick, not inflated, lanceolate, acute, glabrous. Seeds very smal] 
1 lin. long or less, ovate, biconvex, very narrowly margined erey.— 
O. Alpini, Decne. in DC. Prod. viii. 543; Schweinf. Pl. Nilot. 29, 
O. egyptiacum, Decne. in DC. Prod. viii, 504, name only. O. Secamone 
K. Schum. in Engl. & Prantl, Pflanzenfam. iv. ii. 229. Periploca Seca- 
mone, Del. Fl. Aigypt. Ilust. 56 (ex Decaisne), not of Linn. 
Nile Land. Abyssinia: Agow; banks of the River Awarra, near Mawerr 
3300 ft., Schimper, 2305! 
Also in Egypt. 
A form with acute, non-inflated follicles also occurs in India, but the seeds are 
larger, about 14 lin. long. The quotation by Decaisne of Secamone, Alpinus, Pl. 
egypt. 53, with fig., and ed. Vesling (1640), 133 and 134 fig., and ed, (1735), 63, t. 
48, is altogether wrong for the genus Oxystelma, as the plant there figured is 
Leptadenia heterophylla, 
2. O. bornouense, 2. Br. in Denham & Clapp. Trav. in North 
and Central Africa, App. 239. Characters as in O. esculentum, var. 
Alpini except :—petiole of the leaves 3-9 lin. long; blade 1-2} in. long, 
4-1 in. broad, usually elongated oblong-ovate or deltoid-ovate, acute or 
acuminate, cordate or cordate-hastate at the base, with rounded lobes, 
or occasionally lanceolate or oblong, acute or obtuse, apiculate, rounded 
or subtruncate at the base, glabrous. Corolla 1-1} in. in diam., the 
whole interior veined with dark purple except the tips of the lobes. 
Follicles solitary (always ?), 14-2 in. long, 3-1 in. in diam., very inflated, 
ovoid or ovoid-oblong, very obtuse, glabrous. Seeds 13-24 lin. long, 
flattened, with a broad firm wing, brown.—0O. bornouense, R. Br., and 
O. senegalense, Decne. in DC. Prod. viii. 543; Engl. & Prantl, Pflan- 
zenfam. iv, ii. 228, fig. 66, E. 
Upper Guinea. Senegal, Roger! Perrottet, 468! Senegambia, Heudelot, 
423! Lagos: Abeokuta, Irving, 27! Interior of Western Lagos, Rowland! Niger 
Territory : Nupe, common on the river-banks, Barter, 1131! Bornu, Oudney, 6! 
Wile Land. White Nile, at Om Madeb, Schweinfurth, 982! Mittu: Moolo, 
Schweinfurth, 2850! Somaliland: Webi Abdallah, Keller, 103! near Barcif, Riva, 
691 (ex Schumann). 
This was separated from O. esculentum by R. Brown on account of the different 
leaves and inflated follicles, but the typical Indian O. esculentum has inflated 
follicles, as originally described by Linnzus. The flowers, however, of O. bornouense 
are much more veined with purple, and the seeds very much Jarger, much more 
broadly winged, different in colour, and altogether different in character from those 
ot O. esculentum. 
26. SARCOSTEMMA, R. Br.; Benth. et Hook. f. Gen. 
P). ii. 763. 
Calyx 5-partite. Corolla 5-lobed to the base, rotate or rotate- 
campanulate; lobes overlapping to the left in bud, Corona double, 
arising from the staminal-column; outer corona annular or cup- 
shaped, often pentagonal, truncate or shortly lobed ; inner corona of 5 
erect fleshy compressed or keeled lobes, with their basal part 
