Herbs annual. Roots fibrous. Flowering stems branched from near base, erect or ascending, 8-20 cm. Leaves alternate; leaf blade narrowly obovate to spatulate-oblong, 20-30 × 3-7 mm, base narrowly cuneate and spurred, apex obtusely rounded. Cyme large, many flowered; bracts leaflike, 6-20 × 2-5 mm. Flowers sessile, unequally 5-merous. Sepals broadly linear-ovate, subequal, 1.5-2.4 × 0.3-0.6 mm, base spurred, apex obtuse. Petals yellow, linear-lanceolate, 4-4.5 × 0.8-1.2 mm, base connate for ca. 0.5 mm. Stamens 10; antesepalous ones 3.5-4.5 mm; antepetalous ones 2-3 mm, inserted ca. 1.2 mm from petal base; anthers orange. Nectar scales subspatulate, ca. 0.4 mm. Carpels ovoid-lanceolate, 4-4.5 mm, base connate for 1.2-1.5 mm; ovules 10-20. Follicles stellately divaricate. Seeds oblong, ca. 0.5 mm, minutely mammillate, conspicuously ridged. Fl. May-Jun.
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