Flowers 1–4 per raceme; peduncles slender, straight, 2–9 cm. long in flower, up to 20 cm. long in fruit, with indumentum as on the stem but more sparse and also with patent, soft white hairs up to 2 mm. long, denser towards the base of the peduncles; bracteoles c. 1 mm. long, pubescent; pedicels 3(4) mm. long.
Calyx hairy and sometimes also setose on the outside; tube 9–10·5 mm. long, hairy inside on the lower 4 mm.; lobes 3–5 mm. long, oblong, usually obtuse, with hyaline, ciliolate margin.
Stem 5–100 cm. high, erect, simple or branched, more or less crisply puberulous and also sparsely setose, the setae short (up to 0–5 mm. long), yellow or brown with swollen base.
Capsule 4–7 cm. long and 1–1·5 mm. in diameter, moniliform, at right angles to the peduncle or deflexed, glabrous; beak 2·5 mm. long.
Petals 15–18(20) × 3·5–5 mm., obovate-cuneate, pale yellow to orange, rarely white; ligules 1·5 mm. long.
Seeds 2–2·5 × 1 mm., obovate or obovate-oblong; aril up to 2/3 the length of the seed.
Stamens with 9–13 mm. long filaments, 2 shorter and 3 longer; anthers c. 2·5 mm. long.
Ovary c. 4·5 × 1 mm., narrowly ellipsoid, glabrous; styles 8–10 mm. long.
An annual herb.