Herbs, perennial, with rootstock and somewhat thickened storage roots; stems usually clumped, suberect, to 0.5 m, quadrangular or narrowly 4-winged, hirsute at nodes to glabrescent, smooth or rarely scabrid. Leaves in whorls of 4(-6), subsessile; blade drying papery, lanceolate, ovate, obovate, elliptic-oblong, broadly elliptic, or suborbicular, 1-4(-5) × 0.3-2 cm, both surfaces hairy to scabrid, base cuneate to rounded, margins flat or often revolute, apex acuminate, shortly cuspidate, or acute; principal veins 3(or 5), palmate. Inflorescences thyrsoid, paniculate, terminal and axillary cymes usually longer than subtending leaves; axes subglabrous to sparsely hirsutulous; bracteoles lanceolate, 2-5 mm; pedicels 1-3 mm. Ovary 0.3-0.4 mm in diam., glabrous. Corolla yellow or pale yellow, rotate, ca. 3 mm in diam., glabrous; fused basal part ca. 0.5 mm; lobes subovate, 1.2-1.5(-2) mm, apex thickened, incurved, shortly rostrate. Mericarp berries not seen.
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