Plants perennial, with gray or white tomentose hairs. Rhizomes with scalelike leaves. Stems (5-)10-40 cm, slender, ascending or erect, with scalelike leaves basally, branched along entire length, ± densely white tomentose especially on nodes below inflorescence. Petiole 2/7-2/3 as long as blade; stem leaf blade circular to rhombic-ovate, rarely subreniform, 5-15 × 5-15 cm, densely tomentose, base cuneate, margin dentate to crenate above base, apex obtuse to acute. Capitula terminal, 1.7-3.5 × (2-)2.5-3.5 cm, rarely with a distant basal verticillaster; bracts shorter than calyx, narrowly linear, with dense, small capitate glands, margin ciliate. Calyx 6-7.5 mm, with dense, small capitate glands, throat very oblique; teeth subequal, narrowly triangular or tubular-lanceolate, apex subulate-acute, posterior teeth 1/2-2/3 as long as calyx tube. Corolla bluish, 1.5-1.8 cm; pubescent, glandular; tube exserted, 2-2.5 mm wide beyond calyx; upper lip 2.7-3.3 mm; middle lobe of lower lip 3.8-4.5 × 6-6.5 mm, broadly emarginate. Nutlets dark brown, triquetrous, 2-2.3 × 1-1.8 mm, slightly narrower basally. Fl. Jul-Sep, fr. Aug-Oct (specimens not seen).
Home