Abstract
Two new Hoya R.Br. species from Borneo are described and illustrated. The first, Hoya ruthiae Rodda was collected in Sabah on Bukit Baturong, a limestone outcrop. It is one of the few species in the genus to have clear exudate. It is compared with the morphologically related Hoya uncinata Teijsm. and Binn. The other, Hoya bakoensis Rodda, was collected in the kerangas forests of Bako National Park. It belongs to Hoya section Acanthostemma (Bl.) Kloppenb., a section with numerous members in the Philippines but under-represented in Borneo.
Highlights
Hoya R.Br. is a large and complex genus with more than 500 published species names (IPNI 2015)
Lamb et al (2014) published eight new taxon names in the genus Hoya all described based on materials from Sabah originally collected sterile and brought into cultivation at Kipandi Park (Kampung Kipandi, Moyog, Sabah) where they bloomed and were identified as new taxa
The second was collected by the author in March 2015 during an expedition to Bako National Park (Sarawak, Malaysia) to which it is named after
Summary
Academic editor: S. Razafimandimbison | Received 10 April 2015 | Accepted 13 June 2015 | Published 21 July 2015 Citation: Rodda M (2015) Two new species of Hoya R.Br. (Apocynaceae, Asclepiadoideae) from Borneo. PhytoKeys 53: 83–93. doi: 10.3897/phytokeys.53.5079
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