Frank Posted November 16, 2021 Report Share Posted November 16, 2021 Home / Blumea - Biodiversity, Evolution and Biogeography of Plants Hoya buntokensis (Apocynaceae, Asclepiadoideae), a new myrmecophytic species and Hoya wallichii subsp. tenebrosa, a new subspecies from Borneo (Kalimantan, Indonesia) Authors: Rahayu, S.; Rodda, M. Source: Blumea - Biodiversity, Evolution and Biogeography of Plants Publisher: Naturalis Biodiversity Center DOI: https://doi.org/10.3767/blumea.2021.66.03.06 This article is Open Access under the terms of the Creative Commons CC BY-NC-ND licence. Abstract References Citations Supplementary Data We describe a new Hoya species from Central Kalimantan, H. buntokensis, and a new subspecies of H. wallichii from West Kalimantan, Hoya wallichii subsp. tenebrosa. Hoya buntokensis is part of a group of four species that form specialised leaf structures harbouring ants (here defined as megadomatia), and it is most similar to H. undulata. Hoya buntokensis differs from H. undulata in lamina margin (flat vs undulate); shape of corona lobes outer processes (fan shaped vs elliptic), and in the pollinarium morphology (corpusculum larger than pollinia vs corpusculum smaller than pollinia). Both H. wallichii subsp. wallichii and H. wallichii subsp. tenebrosa are slender plants with ovate to oblong, thinly coriaceous glabrous leaves, slender peduncles with 1 or 2 flowers open at a time, and broadly campanulate corollas. Hoya wallichii subsp. tenebrosa differs from H. wallichii subsp. wallichii in corolla colour (dark purple with a paler edge vs white-cream), corona lobe shape and surface (broadly elliptic, spreading and with a minute inner process, almost black with a velvety surface vs kidney-shaped, erect and with a well-developed acuminate inner process, purple with a shiny surface). Keywords: Hoya darwinii; Hoya mitrata; Hoya undulata; Hoya wallichii; Southeast Asia; ant plant; epiphyte; heath forest; megadomatium; myrmecophyte Appeared or available online: November 15, 2021 Quote Link to comment Share on other sites More sharing options...
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