I conducted a vegetative survey of the wetland habitats at Jean Lafitte National Historical Park and Preserve (JLNHPP) - Barataria Unit. Although wetland habitats make up over 65% of the total park area, there has never been a thorough vegetative survey of this portion of the preserve. Three main habitats were identified: freshwater floating marsh, spoil banks, and waterways. The floating-marsh habitat was further divided into three different community types: thick mat, thin mat, and wax-myrtle thicket. The thick-mat community encompasses four vegetative associations characterized by their dominant species. These are the Sagittaria lancifolia, Typha spp., Schoenoplectus americanus, and Spartina spp. associations. Overall, I identified 168 species in 113 genera in 60 families. Of these, 47 species had never been recorded in the area now encompassed by JLNHPP, and 27 species had not previously been recorded in Jefferson Parish, LA. The three most prevalent families were Cyperaceae (29 species), Poaceae (24 species) and Asteraceae (16 species).