What does caltha mean?
Caltha is a small genus of perennial flowering plants in the buttercup family, Ranunculaceae, best known through its most widespread member, Caltha palustris — the marsh marigold or kingcup. Native to temperate wetlands across the Northern Hemisphere, these plants thrive in marshes, fens, ditches, and along stream banks, producing glossy, buttercup-yellow flowers in early spring that make them one of the first bold splashes of color in damp habitats. Despite the common name, caltha is not a true marigold; the name derives ultimately from the Greek kalathos, meaning a basket or goblet, a reference to the shape of the flower. In everyday usage the word appears mainly in botanical literature, wildflower guides, and gardening contexts, where it signals a moisture-loving native plant valued for early nectar and ornamental cheer. Gardeners may grow it as a marginal aquatic plant at pond edges.
nounA genus of flowering plants in the buttercup family (Ranunculaceae), commonly known as marsh marigolds or kingcups, found in wetlands across temperate regions of the Northern Hemisphere.
- Any plant of the genus Caltha, especially the yellow-flowered marsh marigold (Caltha palustris) of wetlands and stream banks.
"The boggy meadow was brightened by drifts of golden Caltha in early spring."
"Clumps of Caltha palustris lined the ditch, their glossy yellow blooms mirroring the April sun."
"Botanists distinguish Caltha from true marigolds by its buttercup-like petals and preference for saturated soils."
Standard English plural; used when referring to multiple plants of the genus.
"She planted several calthas along the pond's margin."
Despite the name, the 'marsh marigold' isn't a marigold at all — it's a buttercup cousin whose botanical name comes from the Greek word for a woven basket.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of caltha
The word caltha comes from Latin, adopted by Linnaeus when he formalized the genus name in the 18th century. The Latin term itself was borrowed from Greek kálathos, meaning a wicker basket or drinking cup, alluding to the cup-shaped flower. Related borrowings of the same Greek root include calathos and calathus, used in archaeology to describe ancient vase forms. The genus has been recognized under this name since the earliest formal classifications of flowering plants.
How caltha is actually used
Used almost exclusively in botanical and horticultural contexts; in everyday speech gardeners more often say 'marsh marigold' or 'kingcup'. Capitalized as a genus name when referring to the taxonomic group.
Easily confused with caltha
True marigolds belong to the daisy family (Tagetes or Calendula), whereas caltha refers to the unrelated buttercup-family plant known as marsh marigold.