Herbs perennial, 4--25 cm tall, with numerous stout stringy roots. Stems often many, erect or ascending-erect, simple or branched from base, with dense multicellular hairs. Lower leaves 1 or 2 pairs, scalelike. Upper leaves opposite or alternate; petiole 2--3 mm or subsessile; leaf blade elliptic to suborbicular, 1--2.5 X 0.8--1.8 cm, with multicellular hairs, base cuneate to subrounded, apex subrounded, rarely acute. Pedicel ascending-erect, recurved in fruit, 1--2.5 cm, usually ca. as long as subtending leaves. Flowers solitary, in axils of upper leaves. Calyx lobes lanceolate, 4--5 mm, abaxially pubescent, apex acuminate. Corolla yellow, deeply parted, 5--7.5 mm; tube ca. 1 mm; lobes obovate-elliptic, 4--5 mm wide, transparent glandular, apex rounded. Filaments connate basally into a ca. 1 mm high ring, free parts ca. 2 mm; anthers ovate, dorsifixed, opening by lateral slits, ca. 1 mm. Ovary glabrous; style ca. 3.5 mm. Capsule subglobose, ca. 3 mm in diam. Fl. Jun-Aug.
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