Link to this page noun: some of a number of plants of genus Caltha, specifically C. palustris, developing in swampy locations and achieving bright yellow blossoms. Also referred to as cowslip. Caltha palustris, a perennial plant with bright yellowish flowers. See in Vocabulary. A golden-flowered plant, Caltha palustris: in america also known as cowslip. See Caltha and gowan. swamp plant of European countries and the united states having bright yellow flowers resembling buttercups View More others: A perennial plant for the genus Caltha (Caltha palustris), developing in wet locations and bearing bright yellow flowers. In america it is made use of as a pot natural herb beneath the name of cowslip. See cowslip. Related Sources Definition for "marsh marigold" some of a number of plants of genus… View More Hypernym for "marsh marigold" Variant for "marsh marigold"