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Issue: Vol. 636 No. 4: 14 Feb. 2024
Type: Article
Published: 2024-02-14
DOI: 10.11646/phytotaxa.636.4.2
Page range: 279-286
Abstract views: 79
PDF downloaded: 5

Taxonomic revision of the genus Chimonocalamus (Arundinarieae, Bambusoideae, Poaceae) in Thailand

Department of Pharmaceutical Botany, Faculty of Pharmacy, Mahidol University, 447 Si Ayutthaya Rd., Ratchathewi, Bangkok, Thailand 10400
Botany Building, School of Natural Sciences, Trinity College Dublin, University of Dublin, D2, Ireland
Key Laboratory of Plant Resources and Sustainable Utilization/Guangdong Provincial Key Laboratory of Digital Botanical Garden, South China Botanical Garden, the Chinese Academy of Sciences, Guangzhou 510650
Singapore Botanic Gardens, National Parks Board, 1 Cluny Road, 259569, Singapore
Department of National Parks, Wildlife and Plant Conservation, Thailand 84000
Natural History Museum, National Science Museum, Technopolis, Pathum Thani 12120, Thailand; Center of Excellence for Bamboos, Kasetsart University, Bangkok 10900, Thailand; Center for Advanced Studies in Tropical Natural Resources, Kasetsart University, Bangkok 10900, Thailand
Center of Excellence for Bamboos, Kasetsart University, Bangkok 10900, Thailand; Center for Advanced Studies in Tropical Natural Resources, Kasetsart University, Bangkok 10900, Thailand; Department of Forest Biology, Faculty of Forestry, Kasetsart University, Bangkok 10900, Thailand
diversity endemic species temperate woody bamboos Tenasserim Range Monocots

Abstract

Chimonocalamus is a genus in the Arundinarieae (the tribe of temperate woody bamboos), distributed in the Eastern Himalayas, India, Myanmar, China, Thailand, and Vietnam. Distinguishing characters of the genus include pachymorph rhizomes, rings of root thorns at lower culm nodes, a branch complement of 3–5 subequal branches, paniculate inflorescences, and spikelets with 2 glumes and 3–6 florets. Taxonomic knowledge of Chimonocalamus in mainland Southeast Asia has grown as new species were reported from Thailand and Vietnam, adding to those previously documented mainly in China and India.

Such a situation supports an increased understanding in the geographic distribution and diversity of the group. The objective of this paper is to update the Chimonocalamus account for Thailand and summarize taxonomic information pertinent to future studies. Here, our taxonomic revision of Chimonocalamus in Thailand includes three species, C. auriculatus, C. elegans and C. gallatlyi; the latter is a new record for Thailand. Nomenclatural treatments, morphological descriptions, a photographic illustration of C. gallatlyi, and a current distribution map of three species are presented.

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