Herbs biennial, glabrous. Main root conical. Flowering stems branched from base, erect, 3-9 cm. Leaf blade lanceolate to narrowly ovate, 5-7 mm, basal spur obtuse or ± lobed, apex acuminate. Cyme corymbiform, 3-9-flowered; bracts lanceolate to narrowly ovate. Flowers unequally 5-merous; pedicel 2-6.5 mm. Sepal base spurless, apex long acuminate. Petals yellow, lanceolate, 3.5-4.5 mm, base connate for 0.2-0.3 mm, apex acuminate and long mucronate. Stamens 10; antesepalous ones ca. 3 mm; antepetalous ones inserted 0.5-0.7 mm from petal base. Nectar scales broadly spatulate, ca. 0.4 mm, apical appendage transversely oblong. Carpels suboblong, 3.5-3.8 mm, base connate for 0.6-0.7 mm; ovules 6-8. Follicles 6-8-seeded; placenta falcate, apically 3-5-lobed. Seeds obovoid-oblong, 0.7-1 mm, mammillate, narrowly winged. Fl. Jul, fr. Aug-Sep.
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