caltha palustris, known as marsh-marigold and kingcup, is a small to medium size perennial herbaceous plant of the

flower caltha palustris marigold marsh spring wild yellow plant kingcup mayflower green nature april boggy buttercup gold gollins ground may stamen water blooming petal summer damp ranunculaceae wet bloom blossom isolated landscape ditche leaf woods shrub bog blossoming reed marginal white inundate meltwater tree forest details seasonal natural pond