Rondonanthus is a genus of flowering plants in the family Eriocaulaceae. It is endemic to northern South America. Most species are native to the tepuis, flat-topped mountains in the Brazil-Guyana-Venezuela border region.Govaerts, R. (2004). World Checklist of Monocotyledons Database in ACCESS: 1-54382. The Board of Trustees of the Royal Botanic Gardens, Kew.
Species Six species are accepted. Rondonanthus acopanensis (Moldenke) Hensold & Giul. – Bolívar State of Venezuela Rondonanthus capillaceus (Klotzsch ex Körn.) Hensold & Giul. – Bolívar and Amazonas States of Venezuela; Guyana, northern and southeastern Brazil Rondonanthus caulescens (Moldenke) Hensold & Giul. – Aprada-tepui of Venezuela Rondonanthus duidae (Gleason) Hensold & Giul. – Bolívar and Amazonas States of Venezuela; northern Brazil Rondonanthus flabelliformis (Moldenke) Hensold & Giul. – Toronó-tepui of Venezuela Rondonanthus roraimae (Oliv.) Herzog – Mount Roraima along Venezuela/Guyana border
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