Kerria japonica

(Linnaeus) de Candolle

Trans. Linn. Soc. London 12: 157. 1818.

Common names: Japanese- or Easter-rose corête du Japon
Basionym: Rubus japonicus Linnaeus Mant. Pl. 2: 245. 1771
Synonyms: Corchorus japonicus (Linnaeus) Houttuyn
Treatment appears in FNA Volume 9. Treatment on page 390.

Stems moderately flexuous. Leaves: stipules 1.5–2.5 mm; petiole channeled, 3–6(–9) mm; blade bicolored, (2–)3–6(–8.5) × (1–)1.5–3(–3.7) cm, base broadly cuneate to subcordate, proximal margins finely gland-tipped serrulate, ± plicate between impressed veins, apex long-acuminate, hairs 0.3–0.5 mm. Pedicels 5–22 mm, glabrous. Flowers: sepal margins entire, scarious, sometimes serrulate or glandular-fimbriate, apex acuminate, surfaces glabrous; petals (9–)17–25 × (2–)12–15 mm, claws 1–2 mm (innermost in multi-petaled cultivars showing transition toward stamens, 10 × 2–3 mm); filaments erect-ascending, straight, yellow, slender, 4–5 mm, anthers yellow, 0.2–0.3 mm. Nutlets 4–5 × 3.5–4 mm. 2n = 18.

Phenology: Flowering Mar–Jun; fruiting Jun–Aug.
Habitat: Moist suburban forests and woodlands, roadsides
Elevation: 0–700 m


V9 651-distribution-map.jpg

Introduced; N.S., Ont., Ala., Conn., Ill., Mich., N.H., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Utah, Va., e Asia (China, Japan), introduced also in Europe.


Kerria japonica is cultivated in central Europe and North America, particularly in the east, as a shade-tolerant ornamental shrub. The species persists long after cultivation and spreads mostly vegetatively, apparently only rarely spreading by seed. It is expected elsewhere. The cultivar 'Pleniflora' has multiple petals appearing as a yellow-orange rose.

Selected References


Lower Taxa

... more about "Kerria japonica"
James Henrickson +  and Alan S. Weakley +
(Linnaeus) de Candolle +
Rubus japonicus +
Japanese- or Easter-rose +  and corête du Japon +
N.S. +, Ont. +, Ala. +, Conn. +, Ill. +, Mich. +, N.H. +, N.Y. +, N.C. +, Ohio +, Pa. +, R.I. +, S.C. +, Tenn. +, Utah +, Va. +, e Asia (China +, Japan) +  and introduced also in Europe. +
0–700 m +
Moist suburban forests and woodlands, roadsides +
Flowering Mar–Jun +  and fruiting Jun–Aug. +
Trans. Linn. Soc. London +
Illustrated +  and Introduced +
Corchorus japonicus +
Kerria japonica +
species +