Hydrilla verticillata (L.f.) Royle
      
no HD illustration available (m3)
2 540832 Hydrilla verticillata (L.f.) Royle [80 941016 Serpicula verticillata L.f.] Hydrocharitaceae
H.G.A. Engler, O. Drude, Veg. Erde, vol. 9(2): : p. 106, fig. 96 (1908)