Low to short, spreading often sprawling, hairy plant. Stems with two opposite lines of hairs. Leaves oval to oblong lanceolate, toothed, unstalked (or very short stalked) and in pairs. Flowers bright darkish blue with a white centre, 9 to 10 mm borne in opposite, stalked racemes at the base of the upper leaves. Capsule heart shaped with a hairy margin.
Grassland, roadside verges, woodland.
Park/ Old Nursing Home