201. ASCLEPIADACEAE 443 



Stem herbaceous or woody at the base only, usually erect ; underground 

 part tuberous. Corolla with a distinct tube, rarely divided nearly to 

 the base, but then inflorescences terminal. — Species 30. Central and 

 South Africa. Several species yield rubber. {Raphionacme Harv., 

 including Gonocrypta Baill., Kompitsia Cost, et Gall., and Mafekingia 



Baill.) . Raphiacme Harv. 



9. (3.) Corona indistinct, consisting of minute scales. Corolla dark purple. 

 Seeds hairy all round. Leaves oblong-cordate, connected by a large 

 toothed stipular sheath. Flowers in axillary panicles. — Species r. 

 Equatorial West Africa. (Including PerithriK Pierre). 



Batesanthus N. E. Brown 



Corona distinctly developed 10 



10. Corolla with valvate or almost valvate aestivation ii 



Corolla with distinctly contorted aestivation 13 



11. Corona-lobes united high up, usually 10. Anthers with a leaf-like append- 



age at the top. Pollen-carriers at first hooded, subsequently spreading 

 reniform. Flowers in axillary cymes. — Species 7. Madagascar and 

 Mascarenes. Used medicinally. (Including Baroniella Cost, et Gall.) 



Camptocarpus Decne. 



Corona-lobes united at the base only, lanceolate, 5. Anthers with a small 



appendage or without any. Pollen-carriers spatulate or spoon-shaped. 



Leaves lanceolate 12 



12. Corona-lobes rather blunt. Anthers ending in a membranous, trigonous 



appendage. Stigmatic head 5-angled. Flowers in few-flowered axillary 

 cymes. — Species i. Island of Rodrigues. . Tanulepis Balf. fil. 



Corona-lobes tailed. Anthers without an appendage. Stigmatic head 

 conical. Flowers solitary or 2 — 3 together. — Species i. Madagascar. 



Symphytonema Schlecht. 



13. Anthers hairy. (See 7.) Periploca L. 



Anthers glabrous. Corona-lobes 5, filiform or hnear 14 



14. Stigmatic head flat, 5-lobed. Corona-lobes shortly and unequally two- 



cleft at the top. Corolla yellow. Flowers small, in axillary panicles. 



Leaves lanceolate. — Species i. Madagascar. Harpanema Decne. 



Stigmatic head short-conical. Corona-lobes entire or divided into 2 — 3 



filiform branches 15 



15. Corona-lobes provided with 2 lateral teeth at the base ; no lobules within 



them. Pollen-carriers with an oval, entire blade. Corolla greenish. 

 Flowers large, in terminal cymes. Leaves oblong-obovate. — Species i. 

 South-east Africa. (Under Raphionacme Harv,) . Chlorocyathus Oliv. 

 Corona-lobes without basal teeth ; 5 small lobules within them. Pollen- 

 carriers with a notched blade. Flowers small, in axillary cymes or 

 panicles. — Species 15. Central and South-east Africa. Some species 

 are used medicinally, one of them produces a kind of rubber. (Including 

 Leptopaetia Harv.) (Plate 130.) Tacazzea Decne. 



