A perennial, rarely biennial herbaceous plant, a species of the genus Mullein (Verbascum) of the family Norichnikovye (Scrophulariaceae).
The stem is 50-120 cm tall, erect, almost cylindrical at the base, ribbed-striped above, leafy, often blackish-red, sparsely covered with branched hairs, sometimes branched at the top, and the branches never reach the top of the main stem.
The leaves are green above, studded with scattered stellate hairs, more densely pubescent below, less often glabrous or almost glabrous or whitish. The basal leaves are long petiolate, the petiole sometimes reaches 20 cm long, their lamina is 15-30 cm long, 5-15 cm wide, heart-shaped-ovate or heart-shaped-oblong, slightly heart-shaped or at least rounded at the base, biconvex-toothed at the edges. The middle stem leaves are petiolate; the upper ones are almost sessile, ovate or lanceolate from the heart-shaped or chopped-off base, serrated along the edge.
Inflorescence — apical, rather dense brush, usually not branched, sometimes with lateral branches. The flowers are collected in bundles of 5-10, separate bundles are spaced or brought together. The bracts are linear, of the same length with longer pedicels or even exceeding them. Pedicels, like bracts, pubescent, not thickening, longer, reach 5-12 mm in length. The calyx is 3.5—4 mm long, almost to the base divided into narrow, linear lobes. The corolla is yellow (very rarely white), with brownish spots in the throat, with translucent dots, set with stellate hairs on the outside. Flowering in June—July.
The box is broadly elliptical-obovate, 4-5 mm long, blunt, without a spout, exceeding the cup slightly or almost twice; the pubescence of the box is not falling off.