Herbs perennial, 8--30 cm tall. Stems erect or sometimes prostrate, terete, simple or branched, rust-colored pilose. Leaves opposite, uppermost 2 or 3 pairs crowded; petiole 4--10 mm; leaf blade lanceolate to ovate-lanceolate, rarely ovate-elliptic, 1--4.5 X 0.5--1.6 cm, papery, glabrous, pilose or bristly, with many irregularly scattered glandular dots becoming slightly raised when dry, base cuneate-attenuate, rarely broadly cuneate, apex acute to subobtuse. Inflorescences terminal, in capitate clusters. Pedicel 1--4 mm, pilose. Calyx lobes lanceolate, ca. 8 mm, glabrous or sparsely pubescent near base, densely transparent glandular punctate, apex acuminate. Corolla yellow; tube 3--4.5 mm; lobes ovate-elliptic, 7.5--9 X 4--6 mm, apex rounded. Filaments connate basally into a ca. 3 mm high tube, free parts 3--5 mm; anthers oblong, dorsifixed, opening by lateral slits, ca. 1.5 mm. Ovary pubescent; style 5--6 mm. Capsule subglobose, ca. 3 mm in diam., sparsely pubescent. Fl. May-Jul.
Home