The arborescent vegetation of Highlands Hammock State Park, Highlands County, Florida, was sampled by means of the quadrat method during the late spring of 1979. Twenty-five 10 x 10 m quadrats were established in two areas of the park: the “Big Oak Trail” and the “Hickory Trail.” Density, relative density, frequency, relative frequency, basal area, relative dominance and importance values were calculated for each species. Quercus virginiana was dominant in the Big Oak Trail, and Sabal palmetto was co- dominant. Sabal palmetto was dominant on the Hickory Trail with Quercus virginiana the codominant species. Carya glabra while represented by several large trees, was fourth in relative dominance and importance value on the Hickory Trail. Infrequent but severe cold probably accounts for the dominance of the afore-mentioned species.