A survey of aquatic plants belonging to the family Lemnaceae was carried out in the Pantanal wetland (States of Mato Grosso and Mato Grosso do Sul), represented by nine species, divided into four genera. Only two of the reported species had been previously cited for the Pantanal, Wolffia brasiliensis Wedd. and Lemna valdiviana Phil. The other species are Spirodela intermedia W. Koch, Lemna aequinoctialis Welw., L. minuta Kunth, in Humb., Bonp. & Kunth, Wolffiella welwitschii (Hegelm.) Monod, W. lingulata (Hegelm.) Hegelm., W. oblonga (Phil.) Hegelm., and Wolffia columbiana H. Karst. Lemnaceae occurs in all 10 subregions of the Pantanal, with a higher number of species in the Nabileque subregion, where soils are more fertile.
Duckweed; Lemnaceae; Pantanal wetland; taxonomy
