Coarse perennial herb, 60-150 cm. Stem flexuose, ascending, scabrid. Leaves herbaceous, ovate to oblong-ovate, or cordate, 8-12 by 3-7 cm, acute, base very shortly cuneate; margin serrate or denticulate, sparsely hirsute above, appressed tomentose beneath; petiole 3-12 cm, tomentose. Flowers many in lax, axillary, branched cymes at the lower part of the stem. Bracts oblong, 10-15 mm long, long-acuminate, entire or crisped. Calyx 12—14 mm long, smooth, red glabrous within; teeth subulate-lanceolate, slightly larger than the tube. Corolla white, 25-35 mm long, distinctly recurved, outside puberulous. Style and ovary glabrous. Nutlets glabrous or punctate, oblong-ovoid, 6 by 3 mm, apex rounded.
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