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Taxonomy, biogeography and evolution of plants
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RESEARCH ARTICLE
Contents Vol 36(6)

An updated account of Adiantum (Pteridaceae: subfamily Vittarioideae) in Thailand

Sahanat Petchsri https://orcid.org/0000-0003-4032-2728 A * and Thaweesakdi Boonkerd B
+ Author Affiliations
- Author Affiliations

A Department of Science and Bioinnovation, Faculty of Liberal Arts and Science, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom, 73140, Thailand.

B Plant of Thailand Research Unit, Department of Botany, Faculty of Science, Chulalongkorn University, Pathumwan, Bangkok, 10330, Thailand.

* Correspondence to: faassnps@ku.ac.th

Handling Editor: Leon Perrie

Australian Systematic Botany 36(6) 437-456 https://doi.org/10.1071/SB23006
Submitted: 26 April 2022  Accepted: 6 November 2023  Published: 28 November 2023

© 2023 The Author(s) (or their employer(s)). Published by CSIRO Publishing.

Abstract

An updated account of Thailand’s maidenhair ferns, Adiantum L. (Pteridaceae), is presented. The genus consists of 20 taxa, including 19 indigenous and 1 naturalised, distributed in various habitats throughout Thailand, and 5 of them are endemic. We accept A. fragiliforme and A. ciliatum as distinct species on the basis of our investigation. We also accept infraspecific taxa within A. philippense, namely A. philippense subsp. philippense and A. philippense subsp. intermedium. Revised descriptions of A. fragiliforme and A. gomphophyllum from southern Thailand are provided, as is an updated key to the species of Adiantum in Thailand, and vernacular names and conservation status assessments.

Keywords: Adiantum, classification, conservation status, infraspecific taxa, leptosporangiate ferns, new record, revised description, Thailand’s maidenhair ferns.