Herbs, annual, 15–50 cm, glabrous throughout or puberulent near base of stem. Stems erect, branches few, fastigiate or spreading-ascending. Leaves alternate, erect; stipular glands present or absent; blade linear, 11–30 × 0.7–1.6 mm, margins entire or distally sparsely toothed, not ciliate, apex acute. Inflorescences panicles or cymes. Pedicels 4.5–9 mm. Flowers: sepals deciduous, lanceolate to broadly lanceolate, 5.5–9.5 mm, margins of inner sepals conspicuously scarious, all conspicuously glandular-toothed, apex sharply acute to acuminate; petals coppery yellow or orange, red-lined or with short pale to deep brown-red zone at base, obovate with short claw, 6–18 mm; stamens 6–8 mm; anthers 1–1.8(–2.3) mm; staminodia absent; styles connate nearly to apex, 3–11 mm; stigmas pale, capitate. Capsules ellipsoid, 3.5–4.5 × 2.6–3.4 mm, apex obtuse, dehiscing into 5, 2-seeded segments, segments blunt or subacute, persistent on plant, false septa complete, proximal part membranaceous, not terminating in loose fringe, distal part cartilaginous, margins not ciliate. Seeds 2.6–3.6 × 0.9–1.2 mm. 2n = 30.
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