Herbs perennial, 6--15 cm tall. Stems erect or arcuate at base, terete, simple or weakly branched, retrosely appressed pubescent. Lower leaves scalelike, closely spaced. Upper leaves opposite or occasionally alternate near apex of stem; petioles of medial and upper leaves 2--4 mm, narrowly winged by decurrent leaf blade; leaf blade ovate to lanceolate, 5--20 X 4--9 mm, abaxially pubescent, sparsely transparent glandular, adaxially glabrous, base cuneate, apex obtuse to subacuminate. Pedicel recurved in fruit, 1.2--3 cm, pubescent. Flowers solitary, in axils of upper leaves. Calyx lobes lanceolate, 5--6 X 1--2 mm, densely transparent glandular punctate, midvein pubescent abaxially. Corolla white, rotate; tube ca. 1 mm; lobes ovate-elliptic to elliptic, 6--7 X 3--4 mm, sparsely transparent glandular, apex obtuse to rounded. Filaments connate basally into a ca. 1 mm high ring, free parts 2--2.5 mm; anthers dorsifixed, opening by lateral slits, ca. 2 mm. Ovary pubescent at apex; style ca. 5 mm. Capsule unknown. Fl. Jun-Jul.
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