Styrax japonicus

Siebold & Zuccarini

Fl. Jap. 1: 53, plate 23. 1837 ,.

Common names: Japanese snowbell
Synonyms: Styrax bodinieri H. Léveillé Styrax duclouxii Perkins Styrax grandiflorus Griffith Styrax kotoensis Hayata
Treatment appears in FNA Volume 8. Treatment on page 343. Mentioned on page 341.

Shrubs or small trees, to 8(–10) m, not suckering from roots. Leaves: petiole (2–)4–7(–10) mm; blade with 5–8 secondary veins, oblong-elliptic, ovate-elliptic, ovate to ovate-lanceolate, or subrhombic, 3–11 × 2–5(–7) cm, margins of at least some leaves apically remotely serrate, longest arms of abaxial hairs to 0.6 mm. False-terminal inflorescences 2–5-flowered, 1–4 cm; axillary flowers present on at least some shoots (subtending leaves often reduced). Pedicels 15–50 mm, longer than calyx. Flowers: calyx 4–7 × 3–5 mm; corolla (8–)10–16(–23) mm, tube 3–5 mm, lobes 5(–6), imbricate in bud, slightly reflexed, ovate, oblong-ovate, obovate, or ovate-lanceolate, 11–20 × (3–)5–7(–9) mm; filaments distinct beyond adnation to corolla. Capsules ovoid or ellipsoid, 8–15 × 8–10 mm (broader when 2–3-seeded), gray or grayish yellow stellate-pubescent, dehiscent from distal or proximal end, broadly exposing seed(s); fruit wall 0.4–1 mm thick. 2n = ca. 40.

Phenology: Flowering May–Jun; fruiting Aug–Oct.
Habitat: Woods
Elevation: 0-300 m


V8 673-distribution-map.gif

Introduced; Conn., N.Y., Pa., e Asia.


The ornamental Styrax japonicus has become very locally naturalized in three northeastern states.

Selected References


Lower Taxa