Taprooted annual. Stems ascending, with glandular and fine eglandular hairs, 20-40 cm tall. Lvs with glandular and eglandular hairs, green, obovate-spathulate below, lanceolate and acute above, shortly connate in pairs, (10)-15-40 × (5)-8-20 mm. Infl. a lax 5-8-flowered raceme-like monochasium; pedicels erect at flowering, patent or pendent at fruiting, 10-20 mm long; bracts narrow-lanceolate, acute, green. Fls ☿. Calyx cylindric at flowering, clavate, inflated and contracted at mouth at fruiting, often pink, (11)-12-16 mm long, with short dark glandular hairs on the 10 prominent veins, and fine white subappressed eglandular hairs; teeth triangular-obtuse, erect. Petals pink, emarginate; claw lobed at base of limb; coronal scales obtuse, c. 1 mm long. Styles 3, c. 8 mm long. Capsule ovoid, included in calyx; teeth 6; carpophore 3-6 mm long. Seeds blackish, subglobose, warty, c. 1.3 mm long.