Trigonostemon is taxonomically revised for Malesia based on herbarium collections and field observations. Thirty-eight species are recognized in Malesia, of which four of uncertain status and four newly described. The previous infrageneric classifications are briefly reviewed, but none is accepted. Some useful characters are discussed. An identification key, nomenclature, descriptions, typification, geographic distributions and taxonomic notes are provided.

Additional Metadata
Keywords Euphorbiaceae, Malesia, morphological revision, taxonomy, Trigonostemon
Persistent URL dx.doi.org/10.3767/blumea.2018.62.03.04
Journal Blumea: Biodiversity, Evolution and Biogeography of Plants
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Released under the CC-BY 4.0 ("Attribution") License

Citation
Yu, R.-Y., & van Welzen, P.C. (2018). A taxonomic revision of Trigonostemon (Euphorbiaceae) in Malesia. Blumea: Biodiversity, Evolution and Biogeography of Plants, 62, 179–229. doi:10.3767/blumea.2018.62.03.04