220 Lxxxiv. APOCYNACE^ (stapf). [Motcmdra. 



flowering ; calyx 2 lin. long, greenish-brown ; sepals ovate-lanceolate, 

 velvety, 1 lin. long. Corolla-tube rufo-tomentose without, 1 J-^J lin. 

 long ; lobes ovate, f lin. long, yellow, glabrous within, brownish- 

 tomentose without. Follicles densely brownish-velvety, acute, 2J in. 

 long (immature?). Seeds SJ mm. long, 1 mm. broad. 



Soutb Central, Congo Free State: Kassai District; Lubuc, Luja, 274, 

 287. 



This is stated to yield great c[ua tities of a white latex which coagulates in very 

 elastic masses. 



Imperjecthj known species. 



4. M. rostrata^ K. Schum. in Schlechter, Westafrik. Kautschuk- 

 Exped. ?)01. A liane with white flowers. Perhaps identical with 

 M. guineensis. 



Upper Cruinea. Lagos : Ishagarao, SchlecJder, 12312. 



42. ADENIUM, Roem. & Schult. ; Benth. et Hook, f . Gen. PI. ii. 722. 



Calyx 3-4 lin. long, herbaceous, eglandular within ; sepals '), 

 lanceolate or subulate. Corolla funnel-shaped or eampanulate from a 

 short cylindric base, with paired small or obscure scales in the mouth; 

 .scales more or less confluent at the base and formmg obtriangular 

 pockets, alternating with the lobes ; lobes 5 broad, twisted, overlapping 

 to the liijht. Stamens inserted at the base of the widened portion of 

 the corolla tube ; filaments very short ; anthers conniving in a cone, 

 projecting into the widened part of the corolla-tube, lanceolate, with 

 long filiform terminal appendages, sagittate ; basal appendages much 

 longer than the polliniferous part, distinctly tailed ; foot of the con- 

 nective channelled and glabrous in the upper part, with a projection in 

 the centre and a brush-like cushion below decurrent on the filament 

 and passing into the tomentose filamental ridges. Disc 0. Carpels 2, 

 free ; style filiform, short ; stigma eampanulate, capitate, with a basal 

 rim and a minute bifid apiculus, agglutinated to the foot of the con- 

 nective; ovules very numerous, pluriseriate. Mericarps follicular, 

 divaricate or reflexed. Seeds linear-oblong, covered with reversed hairs, 

 with a deciduous coma at either end ; endosperm very thin ; coty- 

 ledons short, convolute ; radicle much longer than the cotyledons. — 

 Succulent shrubs, often with swollen stems and fleshy branches. Leaves 

 in spirals and terminal fascicles, rather fleshy ; axillary stipules ; 

 axillary glands subulate, conspicuous, several in each leaf-axil. Cymes 

 few-flowered, terminal, subsessile ; flowers pink or purple, showy. 



About 12 species; 6 in tropical Africa, 2 in South Africa, 1 in Socotrd, and 3-4 

 in Arabia, some of them very closely allied. 



Widened part of the corolla-tube glabrous within; apical 

 anther-tails rciK^hing slightly beyond the middle of 

 the corolla-tube . . . . . . . 1. A. boehmia?ium. 



