Abstract
SummaryLiede, S.: Cynanchum gerrardii ‐‐ a new combination for a well‐known African species (Asclepiadaceae). ‐ Taxon 40: 113–117. 1991. ‐ ISSN 0040‐0262.Examination of the lectotype (MO), designated here, of Cynanchum tetrapterum (Turcz.) Bullock, revealed that it is a synonym of Sarcostemma viminale (L.) R. Br. A new combination, Cynanchum gerrardii (Harvey) Liede, is required for the single leafless, stem‐succulent African Cynanchum species to which the name C. tetrapterum had been misapplied. In addition, Asclepias aphylla Thunb. is lectotypified and also placed in synonymy under S. viminale.
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