Plants to 5 dm; roots woody-tuberous. Stems erect, simple or branching, slender to stout, sometimes suffrutescent. Leaves subsessile; blade narrowly planate, linear to narrowly lanceolate or rarely oblanceolate, to 6 cm, base attenuate. Inflorescences: flowers usually solitary, sometimes in 2-3-flowered cymules. Flowers: sepals deciduous, ovate, sometimes cuspidate, 5-10 mm; petals yellow or orange, sometimes reddish, rarely pinkish, obovate, 9-15(-25) mm; stamens usually 20-30; stigmas 3, linear; pedicel often recurving in fruit. Capsules ovoid to globose, 4-7 mm. Seeds with arcuate ridges, 1.2(-1.7) mm.
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