Nhecolandia, a sandy sub-region of the Pantanal, has many shalow and subcircular lakes. In October 1988 two transects were established to survey the aquatic vegetation of a permanent pond, named "Baia da Sanguessuga", 250 m diameter and 1,2 m deep (dry season), at Nhumirim farm (18º59'S, 56º39'W, and 90 m alt.). Plants were colected and kept at CPAP and COR Herbaria. A list of 37 plants, their life forms and frequency graphs are presented. The most frequent species are: Utricularia spp., Salvinia auriculata, Cabomba pyauhyensis, Hydrocleis nymphoides, Cyperus cf. polystachyos, Eleocharis spp., Pontederia cordata, Nymphaea amazonum and Echinodorus spp. There is a relation between depth and life form, and a zonation on the distribution of the most important species.
Hydrophytes; aquatic plants; wetiand; plant ecology; vegetation