Stems 5–20(–40) dm. Bark exfoliating readily or tardily in reddish brown or blackish sheets, or gray to brown strips or strings. Branches spreading or ascending, often stunted and straggly; twigs ascending-strigose. Leaves: petiole (1–)2–18(–54) mm, ascending-strigose to canescent or sericeous; blade ovate or broadly ovate to obovate, rhombic, or suborbiculate, (0.7–)1.3–8(–10) × (0.5–)1–6.3(–8.5) cm, base cuneate to obtuse or rounded, usually asymmetric, margins crenate to dentate, (5–)9–51(–69)-toothed, apex obtuse to rounded, abaxial surface moderately to densely canescent or sericeous, adaxial sparsely strigose to glabrescent. Inflorescences cymose, usually 3–35-flowered, rarely 1–2-flowered on lateral branches; peduncle 0–30 mm, sparsely to densely strigose. Pedicels 1.5–8 mm, sparsely to densely strigose. Flowers: hypanthium 1.3–2 × 2.5–4.5 mm, sparsely to densely strigose; sepals 5, lanceolate to deltate-ovate, 1.5–7(–8) × 1.1–2 mm, margins usually entire, sometimes 2–3-lobed apically, apex acute to obtuse, abaxial surface sparsely to densely strigose; petals 5, white or pink, (4–)5.5–11(–11.5) × 3–4.5 mm, sparsely to densely strigose or canescent, especially distally; stamens 10; filaments (2–)2.7–10 × (0.2–)0.5–1 mm; anthers 0.7–1.1 mm; styles (2–)3–5, 3–8 mm. Capsules 3.5–5.5(–7) × 2–3.8 mm. Seeds 0.6–1 mm. 2n = 32.
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