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The rare species are particularly important from the point of view of conservation ecology and evolutionary biology, and often become the focus for policy decisions. The objective was to evaluate the Lauraceae rarity sampled by the Floristic Forest Inventory of Santa Catarina in Deciduous Forest (DF) and Araucaria Forest (AF). Data were collected in 234 sampling units of 0.40 ha each, recording trees with diameter at breast height ≥ 10 cm. We used Rabinowitzʼs methodology to segregate rare and common species, considering three variables: geographic distribution, habitat specificity, and population size. Of the 37 species, 59.46% were rare and 40.54% were common. 56.76% of the species were eurytopic and 59.46% euryecious. 2.70% of the species were exclusive of DF, 67.57% exclusive of AF, and 29.73% occurred in both. This analysis contributed to the understanding of the rarity of the species in the studied region and it can also contribute to conservation actions for this family on Santa Catarina plateau, since most species are somewhat rare and intense forest fragmentation is the current scenario.

A raridade das espécies arbóreas de Lauraceae no planalto do Estado de Santa Catarina, Brasil