Erect annual herb up to c. 18 cm, simple or branched in the upper half. Stems terete, rather densely squamulate-hairy, internodes about as long as the leaves, the upper ones much longer. Leaves (ovate-)lanceolate, decreasing in size upwards, 5-9 by 1-1½(-2.25) mm, herbaceous, glabrous, margin revolute, apex acute, aristulate; 1-nerved. Flowers solitary in the upper leaf-axils, by the long internodes, small leaves, and long spreading pedicels seemingly forming a lax raceme. Pedicel c. 0.75-2.5 cm long, pubescent. Calyx conical-campanulate, 1.5-2.5 mm, about halfway connate, lobes acute-triangular, sparsely ciliate a-long the margin and on the prominent midrib towards the apex. Corolla white, urceolate-cam-panulate, 3-4.5 mm long, bearded in the mouth, lobes 0.75-1.5 mm, rounded. Filaments 2/3 mm; anthers basifixed, extrorse, oblong-ovoid, 0.3-½ mm long, truncate. Pistil 1.5 mm, ovary 0.4 mm, styles inserted far apart, connate in their upper half, stigma broadened truncate, slightly 2-lobed. Fruits globular-mitre-shaped, 2 mm ø, styles still connate in their upper half. Seeds angular, rather minutely reticulate, brown.
In grass fields, along grassy roadsides, 100-400 m. Fl. fr. April, Dec.