452 201. ASCLEPIADACEAE 



78. Anthers with a distinct, membranous, flat or inflated appendage at the apex. 



Corolla usually with contorted aestivation. [Subtribe marsde- 



NiiNAE.] 79 



Anthers with a very short appendage or a small point, or without any 

 appendage at the apex. Corolla nearly always with valvate aestivation. 

 [Subtribe ceropegiixae.] 93 



79. Corona absent. Sepals blunt, with solitary glands. Shrubs. ... 80 

 Corona present 81 



80. Inflorescence i — 3-flowered. Corolla campanulate, woolly within ; segments 



overlapping to the right. Stigmatic head obtuse-conical. Mericarps 

 short, thick, covered with longitudinal ridges. Branches erect or pro- 

 cumbent, downy. Leaves fleshy, linear. — Species i. South Africa 



(Cape Colony.) Rhyssolobium E. Mey. 



Inflorescence many-flowered. Sepals unequal. Corolla-segments over- 

 lapping to the left. Apical appendages of the anthers ciliate-laciniate. 

 Stigmatic head hemispheric or conical. Mericarps long, smooth. 

 Branches twining, glabrous. — Species i. Madagascar and Mascarenes. 



Trichosandra Decne. 



81. Corona arising from the corolla below its sinuses and consisting of 5 scales. 



Sepals blunt. Corolla campanulate. Twining, hairy shrubs. Leaves 

 ovate. Flowers small, in umbels. — Species i. Tropical and South 



Africa. Yields fibre Gymnema R. Br. 



Corona, at least the inner, arising from the stamens 82 



82. Corona double. Twining shrubs. Leaves herbaceous 83 



Corona simple ; lobes in one row, but sometimes furnished with appendages 



on the inner face 85 



83. Outer and inner corona arising from the staminal column and consisting 



. of 5 scales each. Sepals linear-lanceolate. Flowers in few-flowered umbel- 

 like cymes.— Species i. Southern East Africa. Swynnertonia S. Moore 

 Outer corona arising from the corolla, the inner from the stamens. . 84 



84. Sepals lanceolate. Corolla with contorted aestivation. Inner corona 



ring-shaped, slightly lobed. Pollen-masses horizontal. Flowers in pan- 

 icles. — Species i. Equatorial West Africa. Oncostemma K. Schum. 

 Sepals ovate or subulate. Corolla with valvate or almost valvate aestiva- 

 tion. Inner corona of oblong lobes. Pollen-masses erect. Flowers in 

 globose, axillary, partly stalked, pariily sessile umbels. — Species 2. 

 West Africa Anisopus N. E. Brown 



85. Corona-lobes united high up, usually nvunerous. Anthers with a large 



inflated appendage. Pollen-masses flat and thin. Pollen-carriers very 

 small, without distinct arms. Sepals lanceolate, with small solitary 

 glands. Corolla rotate. Herbs with a tuberous root-stock. Leaves 

 narrow. Flowers solitary or in fascicle- or corymb-like cymes. — 

 Species 10. Southern and Central Africa. Some have edible tubers. 



Fockea Endl. 

 Corona-lobes free or united at the base, 5, but sometimes appendaged. 86 



