Herbs perennial, 15--20 cm tall. Stems ascending to erect, angular, usually branched, densely glandular in upper part. Leaves alternate; petiole 1--1.5 cm, narrowly winged; leaf blade ovate to ovate-lanceolate, 3--4 X 1--1.5 cm, glabrous, base cuneate-attenuate, apex acute to acuminate; veins 5 or 6 pairs; veinlets inconspicuous. Racemes erect to slightly arcuate, 10--20-flowered; bracts subulate, ca. 3 mm. Pedicel quadrangular, 4--5 mm. Calyx lobes narrowly ovate, ca. 3 mm, dark brown glandular striate outside, margin membranous, apex acute. Corolla white, campanulate, ca. 5 mm, parted to middle; lobes ovate to rhomboid-elliptic, epunctate, apex obtuse to acute. Stamens ca. as long as corolla lobes; filaments adnate to mouth of corolla tube; anthers ovate to apiculate, dorsifixed. Ovary ovoid; style slightly shorter than corolla. Capsule subglobose, ca. as long as persistent calyx.
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