Perennials; (caudex simple or many-branched). Trichomes of leaves 2-or 3-rayed. Stems erect, unbranched or branched (several) basally, 0.4-3 dm. Basal leaves: blade usually oblanceolate, rarely spatulate, 2-8 cm × 3-10 mm, base attenuate, margins entire or dentate, apex acute or obtuse. Cauline leaves (distal) sessile; blade margins entire or dentate-sinuate. Racemes considerably elongated in fruit. Fruiting pedicels divaricate-ascending, slender, narrower than fruit, 5-8 mm. Flowers: sepals oblong to linear-oblong, 7-10 mm, lateral pair saccate basally; petals yellow, obovate, 14-27 × 3.5-6 mm, claw 9-13 mm, apex rounded; median filaments 9-12 mm; anthers linear, 2-3.5 mm. Fruits erect to ascending, narrowly linear, often straight, sometimes twisted, strongly torulose, 3-10(-12) cm × 1.5-2.7 mm, latiseptate, not striped; valves with somewhat prominent midvein, pubescent outside, trichomes 2-4-rayed, glabrous inside; ovules 24-42 per ovary; style cylindrical, slender, 1.5-5 mm, sparsely pubescent; stigma slightly 2-lobed, lobes as long as wide. Seeds oblong, 2-3.5 × 0.8-1.5 mm; not winged or winged distally. 2n = 36.
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