A phytosociological research concerning liana vegetation has been accomplished at Fazenda Canchim - Embrapa/CPPSE. The forest under analysis, which is fragmented in two parts, covers an area of 112 ha, located at 21º57' S and 47º50'W. 75 plots of 10 × 10 m were studied where all liana individuals had at least 2.5 cm in diameter, measured 1.3 m above soil level. Five hundred and twenty eight individuals were found, all of which belonged to 45 species, representing a specific diversity (H') 3.20 nats. Most of the species were among the families Bignoniaceae, Malpighiaceae, Sapindaceae, and Apocynaceae, representing together 71.11% of all samples. The species with higher importance value (VI) was Mansoa difficilis (Cham.) Bureau & K. Schum. Most of the sampled individuals were small in diameter and four reached over 10 cm.
Phytosociological structure; lianas; semidecidual forest
