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Erect herb, 30-100 cm, branched, sparsely pubescent, often woody at base. Leaves membranaceous, rhomboid or ovate, 1-2 by 0.5-1 cm, acute at both ends, few-toothed; glabrous above, often glandular beneath; petiole 2-5 mm, pubescent. Paniculate inflorescence terminal, often profusely branched, 10-30 cm long, branches 4-15 cm long, lax-flowered. Bracts lanceolate, often minute, 1-2 mm. Calyx 2-2.5 mm long, in fruit 4-5 mm; throat with a ring of hairs; teeth deltoid. Corolla pale pinkish or pink, 3-3.5 mm, 2 fertile stamens slightly shorter than the upper corolla-lobe; staminodes generally absent. Nutlets ellipsoid, 1 by 0.7 mm broad, brown, reticulate.
A herb. The stem are 1 m high. They have many branches. The leaf stalk is 0.3-1.8 cm long. The leaf blade is oval to sword shaped and 1.3-3.5 cm long by 0.5-1.8 cm wide.
