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Scleria pantadenia Meganck & Bauters and Scleria tricristata Meganck & Bauters are presented as new species of Scleria (Cyperaceae) from Tanzania. Scleria pantadenia is a small, tufted annual sedge species characterized by its delicate, brittle appearance and its small nutlets with gland-like tubercules and basal rim of swollen tuberculate cells. Scleria tricristata is a small, tufted annual sedge species characterized by a single, terminal unbranched spike and its remarkable nutlets with three protruding dentate ridges of translucent tissue. Both species are described, illustrated and compared with their closest relatives.