Description from Flora of China
Herbs perennial, rhizomatous, stoloniferous. Stems erect, to 60 cm tall, densely lanate-villous, with hairs to 2 mm, striate, much branched apically. Leaves sessile; leaf blade obovate to oblong, 1-3.2 × 0.4-1.2 cm, unevenly villous except adaxially densely lanate-villous on midrib, margin 5-12-crenate. Verticillasters 2-6-flowered, inserted on all but basal nodes. Pedicel 4-5 mm. Calyx tubular-campanulate, less than 3 mm, very swollen in front at base, villous and glandular villous outside; teeth triangular, subequal, ca. 1/2 as long as tube. Corolla purple, ca. 2 × as long as calyx, pubescent outside; limb with a tuft of hairs inside, middle lobe circular, lateral lobes narrowly, obliquely ovate-triangular. Ovary white, bullate, hairy. Nutlets unknown. Fl. Jul.
Used medicinally and as a spice.
Marsh margins, moist grasslands. Xinjiang [Kazakhstan, Kyrgyzstan, Russia, Tajikistan, Turkmenistan; SW Asia, Europe]