Caltha palustris, a perennial plant with bright yellow flowers.

Used other than figuratively or idiomatically: see marsh, grass. / A genus (Spartina) of coarse grasses growing in marshes.

Any of various lakes in Minnesota, United States. / Any of various lakes in Nova Scotia, Canada. / Any of various lakes in Yukon, Canada. / A community in Yukon.

plural of marsh treader

A water measurer / Any insect in the superfamily Mesovelioidea, related to the water strider

The plant Crepis paludosa.

plural of marsh pink

Sabatia stellaris, an annual halophyte with pink flowers, endemic to the eastern United States.

(medicine, archaic) malaria

plural of marsh warbler