Japan Flora: Annual or biennial; stems 20-60 cm. long, much branched; leaves linear-lanceolate, 2-5 (-9) cm. long, 3-10(-20) mm. wide, ob­tuse or acute, petiolate only in the lower ones, loosely pilose on both surfaces; racemes 10-15 cm. long, the pedicels bracteate, 2-5 mm. long, as long as the bracts, deflexed after anthesis; calyx-segments lanceolate, 1-3 mm. long, reflexed after anthe­sis; corolla 3(-5) mm. across, pale blue to white, yellow on the tliroat; nutlets tetrahedral, smooth, glochidiate. June-Aug.

Reported to be spontaneous in Hokkaido (Ishikari Prov.). Sakhalin and Korea to Europe; naturalized in N. America.