Herbs, perennial, from thin creeping rhizomes. Stems erect, 20-35 cm tall, with 4 thickened angles, smooth, at nodes glabrous or hispidulous. Leaves in whorls of 4(-6), subsessile, with petiole up to 2 mm; blade drying papery to leathery, elliptic or elliptic-oblong to ovate, (12-)20-25(-28) × (7-)10-11(-15) mm, glabrous or hirtellous to hispidulous along principal veins, ± abruptly narrowed into short petiole, margins antrorsely ciliolate, apex obtuse to subacute; principal veins 3-5, palmate. Inflorescences umbel-like thyrsoid and many-flowered panicles with terminal and lateral cymes from uppermost leaf axils; peduncles smooth and glabrous; bracts narrowly oblanceolate or elliptic to ligulate, 1-3 × 0.5-1.5 mm; pedicels 0.5-1.5 mm. Ovary ellipsoid, ca. 0.8 mm, glabrous. Corolla white, funnelform, with tube ± as long as lobes, 4-5 mm in diam.; lobes 4, elliptic-oblong. Mericarps ovoid, 1.7-2.8 mm, glabrous and smooth. Fl. and fr. Jul-Sep.
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