BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Hoya medinillifolia (Apocynaceae Asclepiadoideae), Una nuova specie proveniente dalle foreste di bassa quota del Sarawak, Borneo -La nuova specie, Hoya medinillifolia Rodda & Simonsson viene qui descrita ed illustrata. Presenta similarità con la ampiamente diffusa Hoya multiflora Bl. e la specie endemica delle Filippine Hoya platycaulis Simonsson & Rodda a causa dell'abitus eretto, le foglie lanceolate coriacee ed i fusti giovanili appiattiti. Può essere facilmente differenziata da queste in quanto presenta lobi della corona cuoriformi e differente venatura fogliare.

A new species from kerangas heath forest of Brunei, Borneo, Hoya wongii, is here described and illustrated. This species differs from the previously described species of Hoya in having a corona with inflated outer processes and laterally compressed and erect inner processes, ending in two bidentate membranaceous appendages. The corona is inserted above a pale yellow campanulate corolla. We discuss morphological affinities between the new species and other campanulate flowered species of Hoya.

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A new species, Hoya rotundiflora, originally found in a market in Thailand and collected in neighboring Myanmar, is described, illustrated and compared with related species. Hoya rotundiflora appears to be related to Hoya thomsonii and Hoya lyi due to the similar growth habit, but it can be easily distinguished by the shape of leaves, corolla and corona lobes.

In the present paper we publish eight new species from New Guinea, H. domaensis, H. gauttierensis, H. liddleana, H. lucida, H. paradisea, H. pulleana, H. tarikuensis, and H. unirana, and one subspecies, H. krusenstierniana subsp. laticorolla. Five taxa were first diagnosed based on specimens at the Leiden herbarium, one species is only known from a collection at Edinburgh and Lae herbaria, while three are based on recently collected specimens. Hoya leucantha, originally described from a specimen in bud, has been identified among herbarium specimens and was also recently recollected. It is therefore fully described and illustrated for the first time.