Herbs, perennial. Roots numerous, fibrous. Leaves basal; petiole 1.5-10 cm; leaf blade lanceolate to linear-lanceolate, 4-15 × 1-4 cm, thinly papery to papery, glabrous or white pubescent near sinus between lobes, veins 3(or 5), base narrowly cuneate to decurrent onto petiole, margin dentate to incised, each side with 1-5 triangular to linear lobes or rarely repand, apex acute to acuminate. Spikes narrowly cylindric, 2-15 cm, densely flowered, loose or interrupted basally; peduncle 4-15 cm, glabrous; bracts ovate-triangular, 2-3 mm, apically ciliolate, keel thick and extending to apex. Sepals elliptic, 2.2-2.7 mm, glabrous; lower sepals longer than upper ones, keel extending to or near apex, apex subacute to rounded. Corolla yellowish, glabrous; lobes narrowly triangular, 1.4-1.6 mm, patent to reflexed, apex acuminate. Stamens adnate only to near base of corolla tube, exserted; anthers yellow, ellipsoid-ovoid, 1.8-2.2 mm. Pyxis fusiform-ellipsoid, 3-4 mm, circumscissile just below middle, with 2 or 3 seeds. Seeds blackish brown, ellipsoid to ovoid-ellipsoid, sometimes angled, with a shallow groove on ventral face; cotyledons parallel to ventral side. Fl. Apr-May, fr. Apr-May. 2n = 24*.
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