Sorbaria kirilowii
Trudy Imp. S.-Petersburgsk. Bot. Sada 6: 225. 1879.
Plants 15–70 dm. Leaves: blade 14–35 × 8–17 cm; leaflets 13–21, oblong-ovate, (30–)60–90(–130) × (10–)13–30(–40) mm, abaxial surface with simple hairs to 0.8 mm in vein axils, sometimes also stipitate-stellate, adaxial glabrous. Inflorescences (7–)20–30(–42) × (5–)10–17(–33) cm. Pedicels (and axes) usually glabrous. Flowers 5–9 mm diam. (anther tip to tip); hypanthium glabrous; sepals ovate-rounded, margins entire; petals orbicular, 1.9–3.5 mm diam.; stamens 20–25, those opposite petals 1–1.5 mm, others 1.9–2.5(–4.5) mm; ovaries glabrous or nearly so, styles 1–1.2 mm. Follicles 3–5.3 mm, glabrous or nearly so.
Phenology: Flowering Jun–Jul.
Habitat: Roadsides
Elevation: 10–400 m
Distribution
Wash., Asia (China, Japan, Korea, Tibet), introduced also in Europe.
Discussion
Sorbaria kirilowii is cultivated in the United States and Europe, persisting and becoming naturalized in northwestern Washington.
Selected References
None.