Plants perennial, caulescent, not stoloniferous, 3–30 cm. Stems 1–4, usually erect, sometimes prostrate or decumbent, leafy proximally and distally, usually puberulent, from usually vertical, subligneous rhizome. Leaves basal and cauline; basal: 1–4; stipules adnate to petiole, forming 2 linear-lanceolate wings, margins entire, apex of each wing free, acute to acuminate; petiole 1–15.4 cm, glabrous or puberulent; blade lanceolate, oblanceolate, or elliptic, rarely ovate, 1.8–8.8 × 0.7–3.9 cm, thin, base attenuate, often oblique, margins usually entire, sometimes with a few sharp teeth or crenulate, ciliate, apex acute to obtuse, mucronulate, surfaces glabrous or puberulent on margins or veins; cauline similar to basal except: stipules ovate to lanceolate, margins entire or lacerate, sometimes with glandular projections, apex with 2–3 projections; petiole 1.5–7.5 cm; blade 1.9–6.7 × 0.5–1.6 cm. Peduncles 1.5–11.6 cm, glabrous or pubescent. Flowers: sepals lanceolate, margins eciliate, auricles 0.5–1 mm; petals deep lemon-yellow adaxially, upper 2 often brownish purple abaxially, lower 3 dark brown-to brownish purple-veined, lateral 2 sparsely bearded, lowest 6–14 mm, spur yellow, gibbous, 1–2 mm; style head bearded; cleistogamous flowers axillary. Capsules spherical to ovoid, 5–10 mm, usually glabrous, rarely finely puberulent. Seeds light to medium brown or dark red-brown, 2.6–3.1 mm, elaiosome not covering funiculus. 2n = 48.
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