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Semi-deciduous shrub up to c. 1.5 m high, forming small thickets; stems ± erect, stiff; young stems finely striated, pilose, reddish; bark of older stems reddish and smooth. Lvs spreading or slightly ascending; petiole 3-5 mm long, narrowly winged, sparsely pilose, ± reddish, channelled above; blade lanceolate to narrow-ovate or narrow-elliptic, 40-100-(110) × 10-30-(35) mm, acuminate, cuneate at base, glabrous except for principal veins and margins near petiole when young, with network of veins showing distinctly on glaucous to pale green underside of blade, regularly or somewhat irregularly and rather shallowly 2-serrate. Infls densely hairy or tomentose, spreading, compound corymbs terminating short branches, up to 100 mm wide and 40 mm long; peduncles 3-5 mm long, slender. Sepals triangular, 1-1.5 mm long, hairy, sometimes densely so, dark green and sometimes magenta-tipped. Petals broadly ovate to orbicular, c. 2 mm diam., rose-red. Stamens c. = petals. Fr. of diverging, brown, glabrous follicles.
Shrubs, 10–15 dm, ?not rhizomatous?. Stems erect, branched. Leaves: petiole 2–7 mm; blade ovate to lanceolate, 5–10 × 2–4 cm, membranous, base cuneate, margins sharply doubly serrate, ?number of primary and secondary serrations 3–5 times number of secondary veins (excluding inter-secondary veins)?, venation pinnate simple craspedodromous, secondary veins not prominent, apex acute, abaxial surface pubescent, adaxial glabrous. Inflorescences mostly terminal, corymbiform, 5–8 × 5–15 cm; branches finely villous. Pedicels 4–6 mm, finely villous. Flowers 4–8 mm diam.; hypanthia campanulate, 1–1.2 mm, abaxial surface strigose, adaxial pubescent; sepals triangular, 1–1.3 mm; petals light to dark pink, obovate, 1–1.5 mm; staminodes 0; stamens 25–30, 2 times petal length. Follicles oblanceoloid, 2–3 mm, glabrous, ?adaxial suture glabrous or ciliate?. 2n = 36.
Shrub to 1.5 m; lvs lanceolate or lance-ovate, 8–15 × 2.5–5 cm, long-acuminate, sharply toothed, acute at base; infl terminal, compound, short and broad, 5–20 cm wide; pedicels and hypanthium finely pubescent; fls mostly pink, 5 mm wide; fr 2.5–3 mm; 2n=18. Native of Japan, often escaped from cult. June, July.
