Perennials or subshrubs. Trichomes of leaves 2-rayed, sometimes mixed with 3-or 4-rayed ones. Stems ascending, proximal branches terminating in sterile rosettes, (woody at base), 1.5-8.1 dm. Basal leaves: blade linear to linear-oblanceolate, 3.7-15 cm × 1.5-6(-7) mm, base attenuate, margins usually entire, rarely sparsely denticulate, apex acute. Cauline leaves (distal) sessile; blade similar to basal. Racemes considerably elongated in fruit. Fruiting pedicels ascending, slender, narrower than fruit, (3-) 5-10 mm. Flowers: sepals oblong to linear-oblong, 6-11 mm, lateral pair saccate basally; petals yellow, obovate to suborbicular, (11-)14-20(-22) × (3-)4-11.5 mm, claw 8-13 mm, apex rounded; median filaments 7-11 mm; anthers linear, 2.5-4 mm. Fruits ascending to spreading, narrowly linear, straight or only slightly curved inward, not torulose, (2-)3-8.4(-11) cm × 1.5-2.4(-3.5) mm, 4-angled to only slightly latiseptate, not striped; valves with prominent midvein, pubescent outside, trichomes 2-4-rayed, glabrous inside; ovules 48-82 per ovary; style cylindrical, stout, 0.5-4 mm, sparsely pubescent; stigma slightly 2-lobed, lobes as long as wide. Seeds oblong, 1.5-2.5(-3) × (0.7-)1-1.2(-1.4) mm; not winged or winged apically. 2n = 36.
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