A Taxonomic Revision of Sarcolobus R. Br. (Asclepiadaceae: Marsdenieae) in Australia and Papuasia

Abstract

The genus Sarcolobus R. Br. is revised for Australia and Papuasia (Irian Jaya, Papua New Guinea and Solomon Islands). Astelma Schltr. and Papuastelma Bullock are considered congeneric. Three species occur in Australia, namely S. ritae sp. nov., S. vittatus sp. nov. and S. hullsii comb. nov. (Marsdenia hullsii F. Muell. ex Benth.). Nine species occur in Papuasia including S. porcatus sp. nov., S. spathulatus sp. nov. S. vittatus sp. nov., S. kaniensis comb. nov. (Gymnema kaniense Schltr.), S. secamonoides comb. nov. (Astelma secamonoides Schltr.) and S. brachystephanus comb. nov. (Marsdenia brachystephana Schltr). Separate keys to the Australian and Papuasian taxa are given. ( Also discussed are; S. oblongus, S. globosus, S. retusus and S. hullsii.)