A Revision of Brachylophon Oliv. (Malpighiaceae) Based on Morphology, Phylogenetics, and Palynology Reveals a New Species Endemic to Thailand

Wanwipha Chaisongkram; Supannika Phromkhlibnin; Supakan Simachai; Thanakit Suparat; Saroj Ruchisansakun

doi:10.58837/tnh.25.8.266904

A Revision of Brachylophon Oliv. (Malpighiaceae) Based on Morphology, Phylogenetics, and Palynology Reveals a New Species Endemic to Thailand

Wanwipha Chaisongkram
, Supannika Phromkhlibnin
, Supakan Simachai
, Thanakit Suparat
, Saroj Ruchisansakun

Udon Thani Rajabhat University
Mahidol University

Research output: Contribution to journal › Article › peer-review

Abstract

We present a taxonomic revision of Brachylophon (Malpighiaceae) in Thailand, Southeast Asia, based on herbarium collections and a field trip conducted in 2024. Two previously accepted species, B. anatomosans Craib and B. curtisii Oliv., are reported, alongside the new species, B. sirindhorniae Chaisongkram & Ruchis., described and illustrated for the first time. The new species is characterized by having white petals, pedicels 2–5 mm long; filaments 1.5–2.5 mm long; and mericarp 6–7 mm long. A detailed description, illustrations, and a comparison with closely related species are provided to aid in its identification. The discovery of this new species highlights the ongoing need for further exploration and taxonomic study of the genus in Southeast Asia to fully understand its diversity and distribution.

Original language	English
Pages (from-to)	313-323
Number of pages	11
Journal	Tropical Natural History
DOIs	https://doi.org/10.58837/tnh.25.8.266904
Publication status	Published - 20 Oct 2025
Externally published	Yes

Keywords

Acridocarpeae
Endemic species
Flora of Thailand
Limestone
Malpighioideae

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10.58837/tnh.25.8.266904

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title = "A Revision of Brachylophon Oliv. (Malpighiaceae) Based on Morphology, Phylogenetics, and Palynology Reveals a New Species Endemic to Thailand",

abstract = "We present a taxonomic revision of Brachylophon (Malpighiaceae) in Thailand, Southeast Asia, based on herbarium collections and a field trip conducted in 2024. Two previously accepted species, B. anatomosans Craib and B. curtisii Oliv., are reported, alongside the new species, B. sirindhorniae Chaisongkram \& Ruchis., described and illustrated for the first time. The new species is characterized by having white petals, pedicels 2–5 mm long; filaments 1.5–2.5 mm long; and mericarp 6–7 mm long. A detailed description, illustrations, and a comparison with closely related species are provided to aid in its identification. The discovery of this new species highlights the ongoing need for further exploration and taxonomic study of the genus in Southeast Asia to fully understand its diversity and distribution.",

keywords = "Acridocarpeae, Endemic species, Flora of Thailand, Limestone, Malpighioideae",

author = "Wanwipha Chaisongkram and Supannika Phromkhlibnin and Supakan Simachai and Thanakit Suparat and Saroj Ruchisansakun",

year = "2025",

month = oct,

day = "20",

doi = "10.58837/tnh.25.8.266904",

language = "English",

pages = "313--323",

journal = "Tropical Natural History",

issn = "1513-9700",

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AU - Chaisongkram, Wanwipha

AU - Phromkhlibnin, Supannika

AU - Simachai, Supakan

AU - Suparat, Thanakit

AU - Ruchisansakun, Saroj

PY - 2025/10/20

Y1 - 2025/10/20

N2 - We present a taxonomic revision of Brachylophon (Malpighiaceae) in Thailand, Southeast Asia, based on herbarium collections and a field trip conducted in 2024. Two previously accepted species, B. anatomosans Craib and B. curtisii Oliv., are reported, alongside the new species, B. sirindhorniae Chaisongkram & Ruchis., described and illustrated for the first time. The new species is characterized by having white petals, pedicels 2–5 mm long; filaments 1.5–2.5 mm long; and mericarp 6–7 mm long. A detailed description, illustrations, and a comparison with closely related species are provided to aid in its identification. The discovery of this new species highlights the ongoing need for further exploration and taxonomic study of the genus in Southeast Asia to fully understand its diversity and distribution.

AB - We present a taxonomic revision of Brachylophon (Malpighiaceae) in Thailand, Southeast Asia, based on herbarium collections and a field trip conducted in 2024. Two previously accepted species, B. anatomosans Craib and B. curtisii Oliv., are reported, alongside the new species, B. sirindhorniae Chaisongkram & Ruchis., described and illustrated for the first time. The new species is characterized by having white petals, pedicels 2–5 mm long; filaments 1.5–2.5 mm long; and mericarp 6–7 mm long. A detailed description, illustrations, and a comparison with closely related species are provided to aid in its identification. The discovery of this new species highlights the ongoing need for further exploration and taxonomic study of the genus in Southeast Asia to fully understand its diversity and distribution.

KW - Acridocarpeae

KW - Endemic species

KW - Flora of Thailand

KW - Limestone

KW - Malpighioideae

UR - https://www.scopus.com/pages/publications/105024666174

U2 - 10.58837/tnh.25.8.266904

DO - 10.58837/tnh.25.8.266904

M3 - Article

AN - SCOPUS:105024666174

SN - 1513-9700

SP - 313

EP - 323

JO - Tropical Natural History

JF - Tropical Natural History

ER -

A Revision of Brachylophon Oliv. (Malpighiaceae) Based on Morphology, Phylogenetics, and Palynology Reveals a New Species Endemic to Thailand

Abstract

Keywords

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