Stem branched or simple, 6-18 cm tall, glandular or eglandular pilose. Leaf buds prominent in axils at proximal nodes. Proximal cauline leaves often scalelike, less than 1/2 size of median ones, ca. 3 mm. Median cauline leaves elliptic, 0.7-2.9 cm × 3-13 mm, both surfaces densely strigose, margin entire, eglandular or glandular hairy, apex acute. Flower solitary or cyme 2-5-flowered; pedicels glandular hairy. Sepals erect, then spreading, ovate to subelliptic, 3-3.6 × 1.8-2.1 mm, abaxially glandular hairy, veins 4-7, confluent at apex, margin ± glabrous, apex acute. Petals yellow, elliptic to obovate, 6-7.7 × 2.5-4.2 mm, 4-6(-8)-callose, sometimes obscurely so, 3-7-veined, base contracted into a claw 1-1.2 mm, apex obtuse. Stamens 3.5-4 mm. Ovary subsuperior, 1.8-2.2 mm; styles ca. 1.6 mm. Fl. and fr. Jul-Sep. 2n = 32*, 48*.
Home