The survey on the species of Cactaceae family in Rio Taquari Hydrological Basin, RS, Brazil was carried out in order to know the diversity and the distribution of species in the studied area, once there is no data on Cactaceae family in this region. Eleven species were found, distributed in five genera: Cereus hildmannianus K. Schumann, Lepismium cruciforme (Vellozo) Miquel, Lepismium warmingianum (K. Schumann) Barthlott, Lepismium houlletianum (Lemaire) Barthlott, Lepismium lumbricoides (Lemaire) Barthlott, Rhipsalis floccosa ssp. pulvinigera (G.A. Lindberg) Barthlott & N.P. Taylor, Rhipsalis teres (Vellozo) Steudel, Rhipsalis cereuscula Haworth, Parodia ottonis (Lehmann) N.P. Taylor, Parodia haselbergii (Haage ex. Ruempler) Brandt and Opuntia monacantha Haworth.
Cactaceae; diversity; Rio Taquari Hydrological Basin; survey
