26th April 2013
A small growing Marsh Marigold from Poland, very close to C.palustris but now treated as a distinct species by some authorities.
17th April 2014
Caltha palustris is morphologically variable within Poland but the taxon C. laeta can be reliably distinguished on the basis of a range of characteristics.
Elzbieta Cieslak. Morphological variability of the Caltha palustris L. complex (Ranunculaceae) in Poland.
Acta Societatis Botanicorum Poloniae. Vol 73, No.3:193-201, 2004