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Michigan Marsh Marigolds.jpg
Caltha palustris
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
Order: Ranunculales
Family: Ranunculaceae
Genus: Caltha
Type species
Caltha palustris
Synonyms [1][2]

Thacla Spach

Caltha is a genus of rhizomatous perennial flowering plants in the family Ranunculaceae ("buttercup family"), native to wet areas in temperate and cold regions of both the Northern and Southern Hemispheres.[2] Their leaves are generally heart-shaped or kidney-shaped, and are characteristically diplophyllous (the auricles of the leaf blades form distinctly inflexed appendages).[2] There are 10 species if the genus Psychrophilia is included in Caltha):[2]


  1. ^ "Caltha L.". Panarctic Flora. Retrieved October 23, 2013. 
  2. ^ a b c d Eric Schuettpelz & Sara B. Hoot (2004). "Phylogeny and biogeography of Caltha (Ranunculaceae) based on chloroplast and nuclear DNA sequences". American Journal of Botany 91 (2): 247–253. doi:10.3732/ajb.91.2.247. 
  3. ^ "Psychrophila sagittata". The Plant List. Retrieved 2015-04-26. 

External links[edit]

  • Media related to Caltha at Wikimedia Commons
  • Data related to Caltha at Wikispecies