Herbs perennial, glabrous, 40--60 cm tall, ± aromatic when dry. Stems erect, terete or angular in upper part, branched from base. Leaves alternate, evenly distributed on stems; petiole 3--5 mm; leaf blade lanceolate, 30--45 X 5--15 mm, subleathery, abaxially glaucous, adaxially dark green, base cuneate, apex acute to subacuminate; veins 2 or 3 pairs; veinlets invisible. Pedicel 2.5--3 cm. Flowers solitary, axillary. Calyx lobes lanceolate, ca. 3 mm, costate. Corolla yellow, ca. 6 mm, deeply parted; lobes narrowly oblong, ca. 5 X 2 mm, apex subobtuse. Filaments connate basally into a ring, free parts ca. 0.5 mm; anthers ca. 3.8 mm, basifixed, opening by apical pores. Capsule subglobose, 3--3.5 mm in diam.
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