Clematis macropetala Ledeb.

Woody climber. Leaves bipinnate or tripinnate. Leaflets more or less ovate, lobed and toothed. Flowers solitary in axils of old wood, nodding. Perianth segments hairy, violet or white; spring to summer.

N China, N Russia

Source: Gubbins, B.; Spencer, R. (1997). Clematis. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 2. Flowering plants. Dicotyledons. Part 1. The identification of garden and cultivated plants. University of New South Wales Press.

kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Ranunculanae
order      Ranunculales
family       Ranunculaceae
genus        Clematis L.