Herbs annual, glabrous. Stems branched from base, erect or ascending, 1.5-3 cm. Leaf blade linear to linear-oblong, 4-7 mm, base spurred, apex subobtuse. Cyme corymbiform, 1-3-flowered; bracts linear to linear-oblong. Flowers unequally 5-merous; pedicel 3-7 mm. Sepals oblong to linear-oblong, 5-7 mm, veins 6-8, basal spur truncate or obtuse, apex acute. Petals yellow, subobovate, 7-7.5 mm, base connate for 0.5-0.8 mm, apex obtuse and very shortly mucronate. Stamens 10; antesepalous ones 5.5-6 mm; antepetalous ones inserted ca. 2 mm from petal base. Nectar scales spatulate, widened near base, 1-1.5 mm, apex retuse. Carpels erect, ± free. Styles ca. 1.8 mm. Follicles almost free, oblong, ca. 7 mm, 5-seeded; placenta falcate, not stalked. Seeds oblong, ca. 1 mm, mammillate. Fl. Aug, fr. Sep.