Taprooted herbaceous plant 150 cm. Leaves ovate or elongate-ovate, biserrate. Flowers light blue or almost white, to 2.5-3.5 cm long, very many in a paniculate inflorescence. V - May to September-October. Fl - for one month or more, June-July, occasional flowers appear till the end of the growing season. Fr - July-October. P - by seed, flowers the year after sowing. Can be cultivated in sunny and also in partly shaded places Z 4. Good for group planting, where can grow for many years once established.

Caucasus and Anatolia. In forest, in subalpine zone.