This research aimed to characterize the floristic composition of the tree synusiae in a Semideciduous Seasonal Forest patch located in Viçosa, Minas Gerais State, Brazil (20º45'S and 42º55'W). The regional climate is classified as Cwa by the Köppen system. For the phytosociological survey, five groups of four contiguous 10 x 25 m plots were installed, at 80 m intervals, in which all the individuals with 15 cm CBH (circunference at breast height) or more were sampled. A total of 124 species were identified, belonging to 80 genus and 41 botanical families. Based on their importance value (VI), the most representative species were Mabea fistulifera (14,51%), Xylopia sericea (5,09%), Piptadenia gonoacantha (4,89%), Xylopia brasiliensis (3,79%) and Lacistema pubescens (3,65%). The most important families were Euphorbiaceae, Annonaceae, Mimosaceae, Lauraceae, and Myrtaceae. The Shannon diversity index (H') was 3,56 and the estimated basal area was 28,7 m². Typical species secondary sucession advanced stages were registered.
Forest fragment; phytosociology; Seasonal Semideciduous Forest
