Thalictrum aquilegiifolium 'Thundercloud'

Flowers dark coloured.

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Ranunculanae
order      Ranunculales
family       Ranunculaceae
genus        Thalictrum L.
species         Thalictrum aquilegiifolium L.