Lagarosiphon counts ca. 15 species in tropical and subtropical Africa (incl. Madagascar) and India. One species, Lagarosiphon major, is much cultivated as an ornamental aquarium plant.
Obermeyer A.A. (1964) The South African species of Lagarosiphon. Bothalia 8: 139-146.
Symoens J.J. & Triest L. (1983) Monograph of the African genus Lagarosiphon Harvey (Hydrocharitaceae). Bull. Jard. Bot. Nat. Belg. 53: 441-488.