The vascular plant species at Corson's Woods, comprising 8.1 hectares, in Staten Island, New York, were sampled at monthly intervals from May 2008 to October 2011. The flora consists of 159 species in 124 genera and 57 families. The Poaceae, 10 taxa, was the largest family in the flora. Quercus, the largest genus, was represented by 5 taxa. Thirty four taxa, 21% of the flora, are not native to the region. Eight vascular plant species, rare in New York City, were identified including log fern, Dryopteris celsa, a species not observed on Staten Island since 1907. The woods are dominated by yellow poplar, Liriodendron tulipifera, sugar maple, Acer saccharum and sweet gum, Liquidambar styraciflua.