E. palustris

E. palustris may refer to:
 * Eimeria palustris, an apicomplexan parasite species that infects the marsh rice rat
 * Eleocharis palustris, the common spike-rush, creeping spike-rush or marsh spike-rush, a plant species growing in wetlands throughout the Boreal Kingdom
 * Epipactis palustris, the marsh helleborine, an orchid species