Subshrub to c. 75 cm tall, smelling strongly of peppermint. Stems, lvs and infl. with ± velvety white tomentum, and glandular scales beneath hairs. Petiole to c. 30 cm long. Stipules ovate-acuminate, brown and membranous. Lamina to 12 × 15 cm, broadly obovate, rather shallowly 3-lobed with each lobe usually lobulate, serrate-dentate and extending 1/4-1/2 way to midrib; base usually shallowly cordate, sometimes deeply so. Infl. of several umbels, each with 5-8 fls; hairs dense, mostly long and simple but some short and glandular; peduncles often = petioles; pedicels 2-3.5 cm long, generally radiating widely in umbels of 6-8 fls. Sepals 5.5-6.5 mm long, ± triangular-ovate, green, with copious long white hairs; calyx spur c. 2 mm long. Corolla white or pinkish; upper 2 petals 7-8.5 mm long, ± oblong, usually with asymmetric base, crimson-purple-marked in lower 1/2; lower 3 petals 8-10.5 mm long, linear or ligulate. Style crimson or purplish, c. 4 mm long; stigmas crimson or purplish. Mericarps not seen.