The genus ceropegia on the canary islands spain asclepiadaceae ceropegieae a morphological and taxonomic account
Bruyns, P.


Abstract
1. In stem- and leaf-form the Ceropegias of the Canary Islands are not typical of the genus. A similar mature stem-form obtains in C. rupicola and similar leaves are found in a Pan-African group but neither group shows any further relation to the Canarian species. 2. The structure of the inflorescence is also atypical. Related to the fact that the stems are perennial is the repeated usage of the inflorescence over several growth seasons. This is found widely in the Stapelieae but not in Ceropegia. 3. Florally these species show some possibly primitive features: they lack the remarkable corolla form found in some species and have a small, glabrous staminal column with small anther wings. This contrasts with the derived vegetative characters. 4. C. dichotoma and C. fusca are the only species recognized in the section Sarcodactylus from which C. rupicola is removed. C. dichotoma is lectotypified by the illustration of Link and Otto (1821) and C. fusca is typified by part of the type collection at Z. The names C. krainzii, C. hians, C. ceratophora and C. chrysantha are reduced to synonymy under C. dichotoma which has two subspecies.


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