Abstract
The list of the species of Hoya R.Br. occurring on the Indonesian island of Sumatra is updated and the type citation is clarified. Sixteen taxa are added to the latest checklist. Hoya danumensis subsp. amarii S.Rahayu & Rodda subsp. nov., H. rigidifolia S.Rahayu & Rodda sp. nov., H. solokensis S.Rahayu & Rodda sp. nov., and H. sumatrana S.Rahayu & Rodda sp. nov. are newly described. Hoya parviflora Wight, H. parvifolia Schltr., and H. purpureofusca Hook. are lectotypified.
Highlights
Indonesia has been predicted to have the most diverse array of species of Hoya R.Br (Brown 1810; Kleijn & van Donkelaar 2001)
Indonesia is an extremely large and diverse country and our plan is to complete an inventory and revision of the Indonesian Hoya working on seven separate geographical areas: Sumatra, Java, Kalimantan, Lesser Sunda Islands, Sulawesi, Maluku, and Indonesian New Guinea
Recent papers on Indonesian Hoya were published by Kleijn & van Donkelaar (2001), who revised the genus in central Sulawesi, where 13 species occur; by Rahayu & Wanntorp (2012), who published a checklist and a key to the Hoya of Sumatra that included 27 species; and lastly by Lamb & Rodda (2016), who published a checklist of the Bornean species including 72 species, 34 of which occurring in Kalimantan
Summary
Indonesia has been predicted to have the most diverse array of species of Hoya R.Br (Brown 1810; Kleijn & van Donkelaar 2001). Indonesia is an extremely large and diverse country and our plan is to complete an inventory and revision of the Indonesian Hoya working on seven separate geographical areas: Sumatra, Java, Kalimantan, Lesser Sunda Islands, Sulawesi, Maluku, and Indonesian New Guinea. Recent papers on Indonesian Hoya were published by Kleijn & van Donkelaar (2001), who revised the genus in central Sulawesi, where 13 species occur; by Rahayu & Wanntorp (2012), who published a checklist and a key to the Hoya of Sumatra that included 27 species; and lastly by Lamb & Rodda (2016), who published a checklist of the Bornean species including 72 species, 34 of which occurring in Kalimantan. Three species and one new subspecies are newly published: H. danumensis subsp. amarii S.Rahayu & Rodda subsp. nov., H. rigidifolia S.Rahayu & Rodda sp. nov. (based on material identified by Rahayu & Wanntorp (2012) as H. oblanceolata Hook.f.), H. solokensis S.Rahayu & Rodda sp. nov., and H. sumatrana S.Rahayu & Rodda sp. nov
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