Research Paper

Studies on Typhonium (Araceae — Areae) of Thailand V: Two new species from Eastern Thailand

Piyaporn Saensouk, Surapon Saensouk, Khant Zaw Hein, Thawatphong Boonma, Sarayut Rakarcha, Khamfa Chanthavongsa

Published on: 05 November 2025

Page: 703 - 709

DOI: 10.6165/tai.2025.70.703

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    Abstract

    As part of our ongoing revision of the genus Typhonium in Thailand, Typhonium isaniorum K.Z.Hein, P.Saensouk & Saensouk and Typhonium brevispadix K.Z.Hein, P.Saensouk & Saensouk, two species new to science from Roi Et Province, and Ubon Ratchathani Province, Eastern Thailand, respectively, are described and illustrated. With the addition of these species, the total number of Typhonium species recorded in Thailand increases to 43, although the actual diversity is likely underestimated. A complete taxonomic account of the two new species is provided, including detailed morphological descriptions, distribution, habitat, phenology, conservation status, and discussion of their taxonomic affinities.

    Keyword: Aroideae, Cretaceous sandstone, Indochina, tropical dry deciduous forest, Typhonium brevispadix, Typhonium isaniorum

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