Japan Flora: Perennial herb without stolons; stems 20-25 cm. long, slender, minutely puberulent, erect or ascending, loosely few-leaved; leaves thinly membranous, deltoid-cordate, 2-4 cm. long and as wide, ob­tuse, sparingly pilose, undulate-toothed, the petioles spreading, 1.5-3 times as long as tlie blades; flowers few, solitary in axils, short-pedicelled; calyx tubular-campanulate, about 1 cm. long, glandular-puberulent; corolla about 4 cm. long, sparingly pubescent externally, the tube gradually broadened in upper part, the limb bilabiate, the upper lip bifid, the lower lip 3-fid, the median lobe larger. May. Woods in mountains.

Hon­shu (Kii Prov. and Chugoku Distr.); rare.