is a biennial herb originating in Eurasia, found in fields or on
roadsides. The whole is prominently long-haired. Stems branch at
lower parts and spread sideways, the tips becoming somewhat erect.
Seed leaves at the foot of the stems remain until flowering time.
Most leaves are opposite, 0.7-1cm in length, 0.8-1.2cm in width, in
the shape of a long oblong, with 2-4 serrations on margins. Flower
stalks, same in length as the leaves, appear from axils on upper
portions and set single light blue-purple flowers on them. Bloom