Ludwigia palustris, a flowering plant species in the evening primrose family known by the common names marsh seedbox and water purslane.
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Littoridinops palustris, a species of very small aquatic snail, an operculate gastropod mollusk in the family Hydrobiidae.
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Lathyrus palustris, a wild pea species known by the common name marsh pea, native to Europe, Asia, and North America.
Ludwigia palustris | Caltha palustris | water violet ''(Hottonia palustris)'' | Viola palustris | Quercus palustris | Hottonia palustris | Triglochin palustris | Thelypteris palustris | Terebralia palustris | Tephrocybe palustris | Rosa palustris | Rorippa palustris | Rhodopseudomonas palustris | Radfordia palustris | Pinus palustris | Ortalis palustris | Littoridinops palustris | Lathyrus palustris | Eleocharis palustris | Eimeria palustris | Boeckella palustris | Aethiothemis palustris |
Aethiothemis palustris, a species of dragonfly in family Libellulidae.
Boeckella palustris, a species of copepod that lives in South America.
Host trees in the United States include primarily P. taeda, P. echinata, P. elliottii, P. virginiana, P. rigida, P. palustris, P. serotina, P. pungens and P. strobes, P. ponderosa, P. engelmannii and P. leiophylla.
Eleocharis palustris, the common spike-rush, creeping spike-rush or marsh spike-rush, a plant species growing in wetlands throughout the Boreal Kingdom
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Eimeria palustris, an apicomplexan parasite species that infects the marsh rice rat
Ortalis palustris, a species of ulidiid or picture-winged fly in the genus Ortalis of the family Ulidiidae.
Quercus palustris, the pin oak or Swamp Spanish oak, a tree species native to eastern North America
Radfordia palustris, a species of mite in the subgenus Hesperomyobia of the genus Radfordia.
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Rhodopseudomonas palustris, a gram-negative purple non-sulfur bacteria, notable for its ability to switch between four different modes of metabolism.
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Rosa palustris (swamp rose), a shrub in the rose family native to much of eastern North America.
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Rorippa palustris is a flowering plant species in the mustard family known by the common names bog yellowcress and marsh cress.
Terebralia palustris, the mangrove whelk, a species of brackish-water snail in the family Potamididae.
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Tephrocybe palustris, a species of fungus in the family Lyophyllaceae which parasitizes sphagnum moss.
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Triglochin palustris, Marsh Arrowgrass, a variety of arrowgrass found in damp grassland.
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Thelypteris palustris, the marsh fern, native to eastern North America and across Eurasia.