Hoya billardieri Decaisne 1844

Type description:

In Decandolle, Prodromus Syst. Veg. 8 (1844) 636. 11. H. billardieri, volubilis, foliis ovalibus haud raro basi emarginatis v. subcordatis apice brevissime acuminatis utrinque glabrous, limbo supra petiolum glandulis trinis obtusis instructo, pedunculatis brevibus, receptaculis oblongis bracteolis brevissimis ciliolatis onustis, pedicellis gracilibus, sepalis brevibus puberulis, coronae laciniis subtriangularibus acutis patulis supra subtiliter papillosis, coronae stam. foliol. subrhomboideis medio umbilicato-depressis, angulo interiore obtuso. Habitu H. carnosae. in Nova Hibernia (Labillardiere). v.s.h. Mus, par. ex dono cl. Webb.)

Translation: Twining, leaves oval by no means or rarely bases emarginate or somewhat cordate apexes very shortly acuminate with both sides glabrous, limb above petiole glandular, with three 3 obtuse glands, peduncles short, receptacle oblong full of very short ciliate bracts, pedicels slender, sepals shortly puberulous; lobes of the corolla somewhat triangular acute outspread, above minutely papillose, scales of the corona somewhat rhomboid, in the middle having a navel-like depression, interior angle obtuse.  Habit is as H. carnosa.  It grows on New Ireland in Bismark Archipelago, . (I have seen in the dried state at the Museum from the donation of the most renowned Webb.).

In Tuinbouw Flora (1853) 73 DeVries, name only  Hoya bidwelliana.