| Scientific name: | Caltha palustris L. | |
| Synonym name: | Trollius paluster Krause | |
| Swedish name: | Kabbleka, kalvleka | |
| German name: | Sumpfdotterblume | |
| Nederlandse naam: | Gewone dotterbloem | |
| English name: | Yellow marsh marigold, Cowslip, Kingcup | |
| Plant Family: | Ranunculaceae, Buttercup family, Ranunkelväxter |
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| Life form: | Perennial | |
| Stems: | Hairless and hollow | |
| Leaves: | rounded to kidney-shaped, finely crenate along the margins, and glabrous | |
| Flowers: | 5-9 bright yellow, well-rounded, and slightly overlapping sepals, a thick ring of abundant stamens, a cluster of carpels in the center. | |
| Flowering Period: | April, May, June | |
| Fruit: | Seedpod (follicle) is flattened and recurved; it splits open along the upper side to release the seeds. | |
| Habitat: | Common throughout the country, swamps, ditches and along beaches. |
Derivation of the botanical name: Caltha, Greek calathos, meaning a cup or goblet, and refers to the shape of the flowers. palustris, swampy, marshy. Trollius, from the German name Trollblume, Globe flower.
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