Contribution to a revision of Hoya (Apocynaceae: Asclepiadoideae) of Papuasia. Part I: ten new species, one new subspecies and one new combination

Abstract

The large majority of Hoya R.Br. species known from Papuasia were described in the first half of the 20th century and most of these are endemic. Along with Borneo and the Philippines the region is a centre of diversity of the genus. Since 2006 herbarium materials have been studied for a revision of Hoya of New Guinea along with field investigations on Papuasian Hoya since 2010. In the present paper we publish ten new species, Hoya brassii PI.Forst. & Liddle ex Simonsson & Rodda, H. carrii PI.Forst. & Fiddle ex Simonsson & Rodda, H. edholmiana Simonsson & Rodda, H. evelinae Simonsson & Rodda, H. juhoneweana Simonsson & Rodda, H. krusenstierniana Simonsson & Rodda, H. koteka Simonsson & Rodda, H. stenakei Simonsson & Rodda, H. versteegii Simonsson & Rodda and H. yvesrocheri Simonsson & Rodda, one subspecies, H. juhoneweana ssp. lindforsiana Simonsson & Rodda, and make one new combination, H urniflora (PI.Forst.) Simonsson & Rodda, which is also lectotypified.