Rokohia siamensis is a species of flowering plant in the family Lamiaceae. It a shrub or tree native to southern China (southeastern Yunnan) and northern Thailand.Pooma, R. (ed.) (2005). A preliminary check-list of threatened plants in Thailand: 1-193. National Park, Wildlife and Plant Conservation Department, Bangkok.

The species was first described as Garrettia siamensis by Harold Fletcher in 1937. In 2024 it was placed in the genus Rokohia as Rokohia siamensis.

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