Figwort family (Scrophulariaceae)
Stoloniferous perennial, with cylindrical stems 15-40 cm long, only with protruding hairs on two opposite sides. Downy leaves in opposite pairs, triangular or crenate, with crinkled and toothed margins. Lower leaves on short petioles, upper sessile. Quadripartite flowers 10-15 mm in diameter of deep blue colour, with darker venation, clustered together in loose, erect clusters arising from axils of upper leaves. Flowers May-Aug.
A meadow plant that sometimes encroaches into forest. Grows on mesic, fertile soils, in mixed/pine forests, oak woodland or forest-edge communities.
Descriptions devised by the team at the Independent Department of Forest Botany, Warsaw University of Life Sciences, i.e. L. Witkowska-Żuk, K. Marciszewska, W. Ciurzycki, A. Obidziński and P. Zaniewski.