Shrubs 1-3 m tall. Young branches with 2 bilateral lines of short, minute hairs along internodes; bark gray; winter buds acute, scales 3 or 4, often smooth. Leaves sessile or with petiole to 3 mm; blade oblong or elliptic to obovate-elliptic, 5-10 cm, abaxially densely pubescent or tomentose, adaxially sparsely pubescent, more densely so on veins, base broadly cuneate to rounded, margin serrate, apex acuminate. Flowers solitary or in cymes; peduncles and pedicels glabrous to hirsute. Calyx ca. 2 cm; tube narrowly cylindric, ca. 1 cm, sparsely pubescent; lobes lanceolate, ca. 1 cm, unequal. Corolla purple-red or rose, 3-4 × ca. 2 cm, outside sparsely pubescent; lobes spreading, irregular, inside reddish; filaments shorter than corolla; anthers yellow. Ovary with a yellow-green gland in upper part; stigma 2-lobed. Fruit 1.5-2.5 cm, crowned with a short beak, sparsely pubescent; seeds wingless. Fl. Apr-Aug, fr. Oct. 2n = 36.
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