Shrubs to 50 cm tall, erect. Branches stout, 4-angled, sulcate; branchlets glabrous, densely punctate with grayish white cystoliths. Petiole 4-10 mm; leaf blade ovate to broadly elliptic, (0.5-)2-9 × 1-4 cm, leathery, glabrous, densely covered with cystoliths, secondary veins ca. 5 on each side of midvein, base broadly cuneate, margin entire, apex acuminate and sometimes shortly caudate. Spikes axillary, ca. 1 cm, 1-3-flowered; bracts subcircular, (1.5-)4-5 mm in diam., glabrous; bracteoles subulate, ca. 2 × 1 mm, glabrous. Calyx 5-6 mm, glabrous, 5-lobed almost to base; lobes narrowly lanceolate, apex acuminate. Corolla white, 7-9 mm; lower lip 3-lobed; upper lip triangular, 2-toothed. Staminal filaments glabrous; anther thecae superposed, lower one spurred at base. Capsule fusiform, ca. 8 mm, glabrous, 4-seeded. Seeds yellowish brown, tuberculate. Fl. Sep-Nov, fr. Dec-Feb.
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