Hoya R. Br. (Asclepiadaceae) in Australia – an Alternative Classification

Abstract

An alternative classification to that of Hill, of the species of Hoya R. Br. in Australia excluding the H. australis R.Br. ex Traill complex is given. Six species are described and illustrated with notes on variation, distribution, habitat and conservation status. H. lauterbachii Schumann is a widely distributed species in far north Cape York Peninsula, Queensland and in Papuasia. Flower shape and colour of H. lauterbachii varies considerably, H. gigas Schltr. and H. coronaria var. papuana Bailey are placed in synonony with H. lauterbachii H. alata K. Hill is reduced to synonymy with H. pseudolittoralis Hemsely. Variation in H. macgillivrayi Bailey and H. nicholsoninae F. Muell. is described. H. litoralis Schltr. is recorded for Australia. H. serpens J. D. Hook is naturalised at one locality. A key to the species of Hoya recognized for Australia is given.