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Issue: Vol. 601 No. 3: 11 July 2023
Type: Article
Published: 2023-07-11
DOI: 10.11646/phytotaxa.601.3.3
Page range: 223–262
Abstract views: 676
PDF downloaded: 20

Taxonomic notes on Thrixspermum (Orchidaceae: Aeridinae), with five new species from Thailand

Royal Botanic Gardens, Kew, Richmond, TW9 3AE, United Kingdom, Herbarium, School of Biological Sciences, University of Reading, Whiteknights, Reading, Berkshire, RG6 6EX, United Kingdom, Thai Traditional Medicine Herbarium (TTM), 693 Bamrung Muang Rd., Pom Prap Sattru Phai, Bangkok 10100, Thailand
Forest Herbarium (BKF), Department of National Parks, Wildlife and Plant Conservation, 61 Phahonyothin Road, Chatuchak, Bangkok 10900, Thailand
Herbarium, School of Biological Sciences, University of Reading, Whiteknights, Reading, Berkshire, RG6 6EX, United Kingdom
Royal Botanic Gardens, Kew, Richmond, TW9 3AE, United Kingdom
Royal Botanic Gardens, Kew, Richmond, TW9 3AE, United Kingdom
Aeridinae Section Dendrocolla Section Thrixspermum Monocots

Abstract

Five new species of Thrixspermum (Orchidaceae) are described from Thailand, two from sect. Dendrocolla: T. alboluteum (South-West floristic region), T. praetermissum (East); and three from sect. Thrixspermum: T. simile (South-East), T. flammeum (East), T. polystictum (East). Descriptions, illustrations, notes on distribution, ecology, phenology, conservation status, and morphological comparisons with allied species are provided. Thrixspermum musciflorum and its variety nilagiricum are reduced to the synonymy of T. formosanum. Thrixspermum album is reduced to the synonymy of T. pulchellum. We select a lectotype and an epitype for T. trichoglottis (Hook.f.) Kuntze and provide a detailed description of this common but so far incompletely known species.

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