Calyx 11·5–13 mm. long, patently hairy on the outside; tube c. 9·5 mm. long, hairy inside below the insertion of the petals; lobes c. 3·5 mm. long, oblong, subacute.
Longistylous flowers: filaments of the longer stamens 7–8 mm. long, those of the shorter ones 5·5–6 mm. long; anthers 2–2·5 mm. long; styles c. 8 mm. long.
Flowers 6–11 per raceme; peduncles up to 30 cm. long, hispid and very sparsely setose; bracteoles 1–2 mm. long; pedicels 2·5–3·5 mm. long, hairy.
Stem up to 1 m. high, erect, simple or branched, more or less hirsute and with very sparse yellow or brownish setae swollen towards the base.
Brevistylous flowers: filaments of the longer stamens 8–11 mm. long, those of the shorter ones 6·5–9 mm. long; styles 3·5 mm. long.
Petals 19–20 × 3 mm., bright scarlet, slightly paler abaxially; ligules acute.
Capsule up to 5·5 cm. long; beak up to 6 mm. long.
Ovary 3 × 0·4 mm., oblong, linear, glabrous.
Seeds 2–2·5 mm. long.
An annual herb.