One new combination and four new species of the genus Psydrax (Rubiaceae, Vanguerieae) in Thailand

Brigitta E.E. Duyfjes; Willem J.J.O. De Wilde

doi:10.20531/tfb.2025.53.2.09

One new combination and four new species of the genus Psydrax (Rubiaceae, Vanguerieae) in Thailand

Authors

Brigitta E.E. Duyfjes Naturalis Biodiversity Center, section Botany, P.O. box 9517, 2300 RA Leiden, The Netherlands
Willem J.J.O. De Wilde Naturalis Biodiversity Center, section Botany, P.O. box 9517, 2300 RA Leiden, The Netherlands

DOI:

https://doi.org/10.20531/tfb.2025.53.2.09

Keywords:

Flora of Thailand, lectotype, new records, taxonomy

Abstract

Psydrax comprises ten species in Thailand. Here, four new species, Psydrax celatus, P. maxwellii, P. minoriflorus, and P. pilosus are described from Thailand, and one lectotype is designated. Psydrax abbreviatus is a new combination.

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References

Craib, W.G. (1932). Florae Siamensis Enumeratio 2: 135–144. Siam Society, Bangkok.

Mahyuni, R., Chikmawati, T., Ariyanti, N.S. & Wong, K.M. (2018). The Psydrax dicoccus complex (Rubiaceae) in Malesia, with three new species. Floribunda 5(8): 322–331. https://doi.org/10.32556/floribunda.v5i8.2018.200

Sangrattanaprasert, J. (2013). Studies on the genus Canthium Lam. (Rubiaceae) in Thailand. PhD Thesis, Graduate School Khon Kaen University.

Wong, K.M. (1989). Rubiaceae. In: F.S.P. Ng (ed.), Tree Flora of Malaya: a manual for Foresters, Vol. 4. Longman, Kuala Lumpur.

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Published

2025-08-18

How to Cite

Duyfjes, B. E., & De Wilde, W. J. (2025). One new combination and four new species of the genus Psydrax (Rubiaceae, Vanguerieae) in Thailand. Thai Forest Bulletin (Botany), 53(2), 67–75. https://doi.org/10.20531/tfb.2025.53.2.09