Millettia sirindhorniana and M. tomentosa, two new species of Millettia (Fabaceae: Millettieae) for Thailand

Authors

  • Sawai Mattapha Department of Biology, Faculty of Science, Udon Thani Rajabhat University
  • Somran Suddee Forest Herbarium, Department of National Parks, Wildlife and Plant Conservation, Chatuchak, Bangkok 10900, Thailand
  • Naiyana Tetsana Forest Herbarium, Department of National Parks, Wildlife and Plant Conservation, Chatuchak, Bangkok 10900, Thailand
  • Theerawat Thananthaisong Forest Herbarium, Department of National Parks, Wildlife and Plant Conservation, Chatuchak, Bangkok 10900, Thailand
  • Anusara Kaewmuan Forest Herbarium, Department of National Parks, Wildlife and Plant Conservation, Chatuchak, Bangkok 10900, Thailand

DOI:

https://doi.org/10.20531/tfb.2022.50.2.09

Keywords:

Khun Kon Waterfall, Leguminosae, Pala-U, Pha Son Kaeo, Suan Phueng

Abstract

Two new species of the genus Millettia, M. sirindhorniana and M. tomentosa, are herein described and illustrated. Millettia sirindhorniana shares morphological characteristics with M. extensa and M. fruticosa in being a woody climber with the same leaflet shape and inflorescence type. However, it differs from those species by the presence of stipels and basal callosities, and its shallowly crenate floral disk. Millettia tomentosa is similar to M. extensa and M. suddeei, but differs from the first species by having a brachyblast bearing ca 10 flowers, the standard with basal callosities, presence of a tubular floral disk and oblong to slightly obovate fruits; and it differs from the latter by the absence of stipels, the standard with swollen basal callosities, monadelphous stamens and the tubular floral disc. Descriptions, illustrations, colour plates, vernacular names, etymology, conservation status and key diagnostic characteristics are provided.

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Published

2022-07-08

How to Cite

Mattapha, S., Suddee, S., Tetsana, N., Thananthaisong, T. ., & Kaewmuan, A. (2022). Millettia sirindhorniana and M. tomentosa, two new species of Millettia (Fabaceae: Millettieae) for Thailand. Thai Forest Bulletin (Botany), 50(2), 89–99. https://doi.org/10.20531/tfb.2022.50.2.09

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