Recent intensive exploration in peninsular Malaya for members of the Asclepiadaceae has resulted in the collection of many rare species and new records of species formerly known only from Thailand. In addition, the following 3 new species were also collected. I wish to express my thanks to Mrs. Zaleha Christine Alang, former Head of the Biology Department at Universiti Pertanian Malaysia (UPM), whose generosity made this study possible; to the staffs of the herbaria at the University of Malaya (KLU), the Forest Research Institute at Kepong(KEP), the Singapore Botanic Gardens (SING), Kew (K), British Museum (BM) and Leiden (L) for their generous assistance and to Dr. Herbert Huber for his help with the identification of the new Ceropegia sp.