43^ 200. APOCYNACEAE 



Calyx-segments narrowed at the base, open in bud, deciduous. Corolla- 

 tube constricted at the throat. Anthers pointed. Pericarp fibrous. — 

 Species i. Madagascar and neighbouring islands. Yields oil, poison, 

 and medicaments Cerbera L. 



38. Ovules 4 — 6 in a carpel, in two rows. Disc and glands of the calyx obscure 



or wanting. Seeds with ruminate albumen. Leaves remotely-nerved, 

 usually whorled. — Species 4. Madagascar. {Gynopogon Forst.) 



Alyxia R. Br. 



Ovules 2 — 4 in a carpel, in one row. Seeds with uniform albumen or 



without albumen. Leaves usually closely-nerved 39 



39. Disc distinctly developed, cup-shaped. Calyx without glands at the base. 



Stigmatic head short-cylindrical with a membranous margin at the base. 

 Fruit drupaceous. Seeds with a fleshy albumen. Leaves with numerous 

 axillary glands, usualty whorled. — Species 25. Tropical and South 

 Africa. Some species yield timber and medicaments. Rauwolfia L. 

 Disc obscure or wanting. Anthers pointed. Leaves with hardly per- 

 ceptible axillary glands or without glands 40 



40. Calyx with glands at the base. Stigmatic head elliptical, ending in a 2- 



cleft point. Fruit berry- or nut-like. Seeds with a cartilaginous albu- 

 men. Trees. Leaves opposite. Flowers in terminal panicles. — 



Species 2. Central Africa Hunteria Roxb. 



Calvx without basal glands 41 



41. Stigmatic head depressed-capitate, ending in a 2-cleft point. Carpels 2. 



Mericarps leathery or woody, dehiscent. Seeds winged, exalbuminous ; 

 embryo with kidney-shaped cotyledons and a short radicle. Leaves 

 opposite. Flowers in terminal panicles. — Species 5. Central Africa. 

 One species yields a kind of rubber or resin used as a varnish. 



Diplorrhynchus Welw. 

 Stigmatic head oblong-ellipsoid, without a distinct point. Carpels 2 — 5. 

 Mericarps berry-like. Seeds not winged, with cartilaginous albumen ; 

 embryo with oblong cotyledons and a long radicle. Flowers in axillary, 

 rarely pseudo-terminal fascicles or panicles. — Species 13. Central 

 Africa. One species yields a kind of rubber, another a poison. 



Pleiocarpa Benth. 



42. (33.) Calyx with glands at the base. Fruit succulent, usually indehiscent. 



[Subtribe tabernaemontaninae.] 43 



Calyx withotit basal glands, rarely iHolarrhena) the inner sepals with glands, 

 the outer without. Fruit dry, usually dehiscent. [Subtribe alston- 



IINAE.] 52 



43. Stigmatic head with a usually ring-shaped appendage at the base. Anthers 



more or less sagittate 44 



Stigmatic head without a basal appendage. Anthers shortly 2-lobed 

 at the base. Sepals free or nearly so. Corolla-lobes overlapping to 

 the left 48 



