Studies on Schismatoglottideae (Araceae) of Borneo XXXV – Seven New species of Aridarum

Publication Type:Journal Article
Year of Publication:2014
Authors:YENG, W. O. N. G. S. I. N., LING, L. O. W. S. H. O. O. K., Boyce P. C.
Journal:Aroideana; Journal of the International Aroid Society
Start Page:9
Keywords:Araceae, Aridarum, Borneo, Indonesia, Kalimantan, Malaysia, rheophytic., Sarawak

Seven new species of Aridarum are described and illustrated: Aridarum pendek S.Y.Wong, S.L.Low & P.C.Boyce and A. velutandrum S.Y.Wong, S.L.Low & P.C. Boyce [Sarawak, Malaysian Borneo]; A. alatense S.Y.Wong, S.L.Low & P.C.Boyce, A. surukense S.Y.Wong, S.L.Low & P.C. Boyce, and A. zygosetum S.Y.Wong, S.L.Low & P.C.Boyce [Kalimantan Barat and Kalimantan Tengah, Indonesian Borneo]; and A. hebe S.Y.Wong, S.L.Low & P.C.Boyce [Kalimantan Utara, Indonesian Borneo]. Aridarum caulescens var. angustifolium Bogner & Nicolson is shown to represent a further undescribed species from Sarawak, and is here published as Aridarum orestum S.Y.Wong, S.L.Low & P.C.Boyce. Together these seven novelties take the genus Aridarum to 21 accepted, described species. An identification key to all species is provided.

Full Text

The most recent treatment for Aridarum (Bogner & Hay, 2000) recognized nine species, of which one (A. rostratum Bogner & A. Hay) was taxonomically novel, one (A. borneense (M. Hotta) Bogner & A. Hay) represented a new combination resulting from sinking Heteroaridarum M.Hotta into Aridarum, and one was treated as incompletely known.
Fieldwork on Borneo subsequently has clarified the identity of the incompletely known species (described as Aridarum crassum S.Y.Wong & P.C.Boyce – Wong & Boyce, 2007), succeeded (after more than a century of representation by a single herbarium specimen) in re-collecting Aridarum montanum Ridl., the type species for the genus (Wong & Boyce, 2013b), and to date has resulted in the description of six remarkable new species (Okada, 2006; Wong et al., 2012; Wong & Boyce, 2013a).
Here we are describing an additional seven taxonomic novelties which together take the genus Aridarum to 21 described species.

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