Leaves alternate, fairly numerous and densely set, ± erecto–patent, linear, up to 8–15(25) x 0·8–1·5(2·5) mm., acute at the apex, harshly strigulose mainly along margins and on midrib beneath; margin incrassate, entire or rarely with one pair of denticles; midvein prominent beneath.
Flowers resupinate, solitary, axillary or apparently terminal, confined to the upper part of the plant; pedicels 15–55 mm. long, pubescent with forwardly directed hairs; bracteoles resembling small leaves, sometimes opposite.
A herb. It can grow for one or several years. It can be erect or lie along the ground. The stems are 5-45 cm long. The leaves are alternate and close together. They are 8-15 mm long by 1-2 mm wide.
Capsule ± 10–nerved, subglobose to ovoid, up to 6·5 mm. long, dehiscing by valves up to 2·5 mm. long.
Filaments almost free from corolla, linear, connate above, all pubescent on the inside above.
Anther–tube 1·5–2·5 mm. long, all anthers densely penicillate at the tip, otherwise glabrous.
Stems 5–45 cm. long, usually sparsely branched, ribbed, ± pubescent with upturned hairs.
Seeds broadly elliptic in outline, compressed, 0·5–0·6 mm. long, reticulate, brown.
Hypanthium hemispherical or broadly obconical, ± 10–nerved, appressed pubescent.
Calyx–lobes 2–5 mm. long, acute, entire, strigulose on the outside, spreading.
Annual or perennial erect or ascending herb.