Japan Flora: Coarsely hirsute annual; stems erect, 20-30(-50) cm. long; leaves oblan­ceolate to broadly linear, 3-5 cm. long, 3-5 mm. wide; racemes few or more than 10, suberect, about 10 cm. long, loosely flowred, the pedicels 2-3 mm. long, shorter than the bracts, erect; flowers about 3 mm. across, pale blue; nutlets tetrahedral, with callose bumps or tubercles on back, glochidiate on mar­gin. July.

Naturalized in Japan. Europe to Northeastern China, n. China and Korea, naturalized in N. America.