Annual, glabrous or with few very short hairs. Stems to 50 cm, with spreading branches. Leaves c. 43 x 8 mm, lanceolate, entire. Inflorescence secund, ± lax; bracts entire to pinnatifid. Pedicels c. 1,5 mm. Calyx c. 7 mm, scarcely strigulose; tube c. 3 mm; teeth 3-4 mm. Corolla c. 14 mm, white to yellow; tube c. 11 mm; throat ± closed.
Throughout Europe , C. & S. Russia. Eur.?-Sib. element.