Herbs perennial, 10--30 cm tall. Stems terete, erect or ascending-erect, often branched in upper part, with grayish brown tangled hairs. Leaves opposite; petiole 3--7 mm, narrowly winged. Lower leaves broadly ovate to suborbicular, smaller. Upper leaves broadly ovate to ovate-elliptic, 1.5--3.2 X 0.7--2 cm, sparsely transparent glandular punctate and pubescent, base broadly cuneate to subrounded, apex acute to obtuse. Pedicel 0.7--1.7 cm. Flowers solitary, in axils of upper leaves, or capitate with flowers aggregated near apex of stems. Calyx lobes lanceolate, 4--7.5 X ca. 1.5 mm, abaxially pilose, transparent glandular punctate. Corolla yellow, 5--8 mm, 1--1.5 cm in diam.; tube ca. 1.5 mm; lobes obovate, 4--6 mm wide, erose near rounded apex. Filaments connate basally into a 0.5--1 mm high ring, free parts 1.5--2.5 mm; anthers ovate-oblong, dorsifixed, opening by lateral slits, ca. 1.5 mm. Ovary puberulous; style ca. 3 mm. Capsule brown, subglobose, ca. 4 mm in diam.
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