Herbs biennial. Flowering stems branched from base, erect or ascending, 6-10 cm. Leaf blade oblong to obovate-oblong, 4-9.5 × 1-2.5 mm, abaxially spinescent and hirsute in distal 1/2, adaxially glabrous, base truncate or 3-lobed spurred, margin spinescent ciliate, apex long mucronate. Cyme corymbiform, dense, many flowered; bracts oblong to obovate-oblong. Flowers subsessile, unequally 5-or 6-merous. Sepals linear-oblong, 5.3-6 × 1.3-2 mm, abaxially spinescent hirtellous in distal 1/2, base spurless, margin spinescent ciliate, apex long mucronate. Petals free, yellow, lanceolate, ca. 7.5 × 1.8 mm, abaxially spinescent hairy and apically keeled, apex long mucronate. Stamens 10; antesepalous ones ca. 5 mm; antepetalous ones inserted ca. 2 mm from petal base. Nectar scales oblong-spatulate, 0.4-0.8 mm, apex retuse to obtuse. Carpels erect, adaxially spinescent hairy, base connate for ca. 0.8 mm; ovules 4-6. Seeds oblong, ca. 1 mm, appendaged. Fl. Sep-Oct, fr. Oct-Nov.
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