200. APOCYNACEAE 



439 



44. Sepals united high up, obtuse, usually deciduous. Stamens inserted above 



the middle of the corolla-tube. Anthers deeply sagittate. Disc usually 

 distinctly developed. Inflorescences terminal. — Species 15. Tropical 

 and South-east Africa. (Orchipeda Blume, Piptolaena Harv., under 



Tabernaemontana L.) Voacanga Thouars 



Sepals free or nearly so 45 



45. Corolla-lobes overlapping to the right. Stamens inserted in the middle 



of the corolla-tube. Anther-halves pointed at the base. Disc adnate 

 to the ovary for the greatest part. Ovules about 9 in a cell, in two rows. 

 Mericarps striped, dehiscent. Shrubs. Leaves exstipulate. Flowers 

 small. — Species i. East Africa. Used medicinally. 



Schizozygia Baill. 



Corolla-lobes overlapping to the left. Disc free or wanting. Leaves 



stipulate 46 



46. Corolla-tube slightly widened above the insertion of the stamens. Anthers 



obtusely 2-lobed at the base. Disc ring-shaped. Shrubs. Flowers 

 large, white. — Species 6. West Africa. (Under Tabernaemontana L.) 



Callichilia Stapf 



Corolla-tube gradually narrowed above the insertion of the stamens. 



Anthers distinctly sagittate. Disc wanting 47 



47. Corolla-tube slender or widened at the base ; stamens inserted near its base. 



Climbing shrubs. Leaves without axillary glands. — Species 8. West 

 Africa to the Great Lakes. (Under Tabernaemontana L.) 



Gabunia K. Schum. 

 Corolla-tube widened and bearing the stamens at the middle. Trees or erect 

 shrubs. Leaves usually with numerous axillary glands. — Species 35- 

 Tropical and South Africa. Some species yield timber, fibres, rubbei 

 edible fruits, or medicaments, or serve as ornamental plants ; some 

 are poisonous. (Under Tabernaemontana L.) Conopharyngia Don 



48. Corolla bell- or funnel-shaped ; tips of the lobes not bent inwards in the 



bud. Disc ring-shaped, adnate to the ovary 49 



Corolla salver-shaped ; tips of the lobes bent inwards in the bud. Disc 

 none $0 



49. Narrow part of the corolla-tube short. Bracts small, not forming an 



involucre. Undershrubs with a creeping root-stock. — Species i. 



Equatorial West Africa (Cameroons) . . . Calocrater K. Schum. 



Narrow part of the corolla-tube long. Bracts large, forming an involucre. 



Erect or twining shrubs. — Species 2. Equatorial West Africa (Gaboon). 



Crioceras Pierre 



50. Stigmatic head globose, entire, without an apical point. Mericarps 3- 



winged, not or tardily dehiscent. Erect shrubs. Axillary glands and 

 stipules present. Flowers small, in terminal few-fiowered cymes. — 

 Species i. Equatorial West Africa. (Under Tabernaemontana L.) 



Pterotaberna Stapf 

 Stigmatic head oblong, crowned by a 2-cleft point 5^ 



