A taxonomic revision of Garcinia section Discostigma (Clusiaceae) in Thailand.

Garcinia section Discostigma (Clusiaceae) is revised for Thailand with four species: , , , and . Morphological descriptions, illustrations, and an identification key to the species are provided, along with notes on distributions, habitats and ecology, phenology, preliminary conservation assessments, etymology, vernacular names, uses, and specimens examined. Two taxa, and , are newly synonymised under . Nine names are lectotypified here, including four associated synonyms of -G. merguensis var. truncata, G. merguensis var. pyramidata, , and -as well as and four associated synonyms of : , , , and . Two species, and , have a conservation status of Vulnerable [VU], while the other two species, and , have a conservation status of Least Concern [LC].