Over the years, various forms of Ficaria have been selected and given fantasy so-called cultivar (cv.) names.
The cv. mentioned here has striking dark purple, almost black leaves with the shiny butter-yellow flowers standing out very nicely.
After an early spring bloom, they quickly retract, leaving the tubers underground to reappear in full glory in spring. They are good for use among various plants, but care should be taken not to let them become overgrown by overgrowing surrounding plants.