Annual herb with well developed stems. Stems up to 30 cm long, erect to slightly ascendent, upper parts covered with short hard, glandular hairs in young plants; stem usually branched in the upper part. Leaves opposite, thin, 3-6 cm long, 1.5-3 (-4) mm broad, linear to linear-lanceolate, entire to denate, narrowed gradually at both ends, apices ± obtuse, base slightly dilated, covered sparsely with short, hard, glandular hairs. Inflorescence axillary, peduncles 3-5 cm long, spreading, hairy. Spikes 8-12 (-15) mm long, dense elliptic to short cylindrical-ovate. Bracts 3-8 mm long, slightly concave, narrow-ovate to ovate, in the upper part produced into a long, narrow acuminate part, in the upper flowers the produced parts shorter, covered with intermixed short and long glandular and nonglandular hairs. Sepals 3-3.5 (-4) mm long, anterior oblique-lanceolate, slightly acuminate, covered with similar hairs as on the bracts, posterior concave, slightly compressed, lanceolate-ovate to narrow-ovate, slightly unequal. Corolla tube up to 4 mm long, rugulose; lobes 2 mm long, narrow-ovate, acute. Seeds 2, reddish-brown, narrow-elliptic, shining, 2-3 mm long.