21; see text Cyananthus is a genus of flowering plants that includes 21 species of annual or mostly perennial herbs from high mountains of Central and East Asia.

The name comes from the Greek word for blue flowers.

Leaves are usually small and simple, sometimes narrowing to base, tooth-lobed at summit.

In August to September, the plants bear showy of bright purplish-blue, yellow or white, funnel to bell-shaped, 5-lobed flowers 1 in in diameter with stamens free from the corolla and hairy throat.

They always lose the aerial parts during the coldest months, and as spring begins, stems and leaves quickly start to reproduce.