ABSTRACT
In one inventory of fourteen sample units of 15 x 30 m (750 m2) performed in a portion of the Decidual Seasonal Forest, located on the top of the Army Instruction Center of ‘Boca do Monte’, district of Santa Maria, in the state of Rio Grande do Sul, Brazil, carried out a study about phytosociological structure. To do so, the individuals with circumference at breast height (CAP) bigger or equal than 30 cm were identified and quantified. In each sample, two circular and concentric subsamples were identified for an analysis of the individuals in natural regeneration process, one subsample of 10 m2 with a radius of 1,78 m for the circumference classes from 0 to 15 cm and the other one of 100 m2 with a radius of 5,64 m for the circumference classes from 15,1 to 30 cm. There are 51 vegetable species distributed in 45 classes and 26 botanical families which were identified. Cupania vernalis, Trichilia clausseni, Nectandra magapotamica, Myrcianthes pungens and Mataybae laeagnoides are among the most important and characteristic species from the association, in relation either with the vertical or the horizon structure, creating the typical physionomy of this forest.
Key words:
phytosociology; decidual seasonal forest; regeneration