耕地糙苏 geng di cao su

Roots thickened, ropelike. Stems erect, 40-60 cm tall, appressed or retrorse hairy, flowering parts glandular hairy. Petiole of basal leaves 5-8 cm, others 2-2.5 cm; leaf blade simple hairy, also stellate abaxially, margin obtusely crenate-dentate; basal blades triangular-cordate, 8-10 × 4-6 cm, lower stem leaf blades 5.5 × 3-3.5 cm; upper stem leaves sessile, 15 × 6-8 mm, apex acuminate. Verticillasters 10-12-flowered, shorter than basal floral leaves; bracts linear-subulate, 8-9 mm, spreading hairy, spinescent. Calyx tubular-campanulate, 1-1.2 cm, glandular hairy outside; teeth semicircular to circular, stellate puberulent, apex spinescent-acuminate. Corolla reddish, rarely white, ca. 2 × as long as calyx; tube glabrous, hairy below throat and on limb outside; upper lip ovate, densely bearded inside, margin denticulate; lower lip with reniform-cordate middle lobe, lateral lobes ovate. Posterior filament appendages short spurred. Nutlets apex hairy (specimens not seen).

Grasslands, thickets. Xinjiang [Kazakhstan, Mongolia, Russia].