Erect herbs to 45 cm tall, glabrous, the stems mostly terete; roots fibrous. Leaves opposite, oblanceolate, mostly ca. 3 cm long, 4 mm wide, apically acute, the base narrowed but without a distinct petiole, serrate in the upper '/2, copiously but inconspicuously punctate with brownish, annular glands on each side. Inflo-rescences solitary or fasciculate flowers in the leaf axils; pedicels glabrous, eglandular, to 1 mm long or obsolete, drying angled, bracts narrowly deltoid or linear, 1.0-1.5 mm long, costate, thin, located at the top of the pedicel. Flowers small, the calyx 5-lobed to the base, the outer 3 sepals 2-3 mm long, entire, apically obtuse, costate and nervose, with copious, globose, shiny tawny glands, the 2 inner sepals narrow, slightly shorter than the outer sepals, costate, sparingly glandular; corolla blue or white, ca. 4 mm long, exserted ca. 1 mm from the calyx, 5-lobed, compressed and somewhat 2-lipped, the lobes rotund, 0.5 mm long, the tube pilose within in the lower '/2; stamens 4, the filaments terete, curved, inserted about the middle of the corolla tube, the anthers yellow, rotund, the thecae connate, dorsifixed, versatile; ovary ca. 1.25 mm long, densely glandular, the style ca. 1 mm long, mostly eglandular, distinct from the ovary, stigma slightly 2-lobed. Capsule 2-3 mm long, indurate, glandular, at least near the base and the apex, splitting apically, the placenta yellow, cuneiform; seeds numerous, ca. 0.25 mm long, dark brown, reticulate.
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