A critical study is given of 23 species of Dischidia. The ecology, morphology, and floral biology are discussed, and there is a key to the species. Full attention is paid to synonomy, resulting in many reductions. Dischidia subulata subsp. angustata subsp. nov. is described; D. klossii Ridl. is reduced to D. acutifolia subsp. klossii (Ridl.) Rintz comb. nov.