Perennial herb 30 cm tall. Stems profusely branched, 4-or 5-ribbed, glabrous except for scattered papillae. Leaves alternate, subopposite below, sessile, linear to narrowly oblanceolate, with 3–5 large teeth in distal part, glabrous; lamina 40–45 mm long. Inflorescence of 1–3-flowered dichasia; lateral inflorescences in upper leaf axils; bracts 8–10 mm long, serrate, green; bracteoles linear, 0.9 mm long, entire, brown. Flowers 4-merous; pedicel 0.2–0.3 mm long. Sepals ovate, 0.6–0.8 mm long, papillose. Petals 1.7–2 mm long. Stamens 8. Ovary 4-locular, papillose; styles 4. Fruit 1 per axil, depressed-globose, 1.7–2.5 mm long, 3.5–4 mm diam., weakly 4-ribbed, densely and minutely papillose.