Biennials or perennials; (short-lived). Trichomes of leaves 2–4(–7)-rayed. Stems erect, unbranched or branched distally, 0.4–9(–13) dm. Basal leaves: blade (somewhat fleshy), linear-oblanceolate, 3.5–15.5 cm × 2–9 mm, base attenuate, margins entire or obscurely dentate, apex acute. Cauline leaves: blade (oblanceolate), margins entire. Racemes considerably elongated in fruit. Fruiting pedicels divaricate to divaricate-ascending, stout, slightly narrower than fruit, 4–10(–13) mm. Flowers: sepals oblong to linear-oblong, 7.5–11(–13) mm, lateral pair slightly saccate basally; petals bright yellow, broadly obovate to suborbicular, 14–24 × 6–11(–14) mm, claw 8–14 mm, apex rounded; median filaments 8.5–12 mm; anthers linear, 3–4 mm. Fruits spreading, narrowly linear, straight, not torulose, (2–)3.5–12 cm × 1.5–3.5 mm, latiseptate, not striped; valves with prominent midvein, pubescent outside, trichomes 2–4-rayed, glabrous inside; ovules 50–86 per ovary; style cylindrical, stout, 0.3–1.5(–2) mm, sparsely pubescent; stigma slightly 2-lobed, lobes as long as wide. Seeds oblong, 1.5–3 × 1–1.8 mm; winged distally (narrowly so around). 2n = 36.
