Herbs, perennial, erect, with slender rhizome. Stems 4-angled, pilosulous. Leaves in whorls of 4, subsessile; blade lanceolate, 30-50 × 6-12 mm, length/breadth index above 4, adaxially hispidulous to scaberulous, abaxially pilose at least on principal veins, apex acuminate to subacute; principal veins 3, palmate. Inflorescence terminal, paniculiform, 15-20 × 4-8 cm, with many-flowered cymes; peduncles and pedicels hairy to glabrescent. Ovary ovoid, densely hairy. Corolla yellowish white, rotate, ca. 2 mm in diam., glabrous or pilose; lobes 4, ovate, hairy outside, acute. Mericarps with straight trichomes (and/or ?glabrous). Fl. Jul, fr. Aug-Sep.
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