Kerria japonica

(Linnaeus) de Candolle

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

Common names: Japanese- or Easter-rose corête du Japon
IllustratedIntroduced
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

Distribution

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), e Asia (Japan), also in Europe

Discussion

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

None.

Lower Taxa

None.

"thin" is not a number.

... more about "Kerria japonica"
sericeous-strigose +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
multi-petaled +
yellow +  and slightly orangish or yellow-cream +
James Henrickson +  and Alan S. Weakley +
(Linnaeus) de Candolle +
compound +  and simple +
opposite +  and alternate +
multi-petaled +
yellow +  and slightly orangish or yellow-cream +
broadly cuneate +  and subcordate +
Rubus japonicus +
6 cm60 mm <br />0.06 m <br /> (8.5 cm85 mm <br />0.085 m <br />) +
3 cm30 mm <br />0.03 m <br /> (3.7 cm37 mm <br />0.037 m <br />) +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
ovate +  and lanceovate +
2 cm20 mm <br />0.02 m <br /> (8.5 cm85 mm <br />0.085 m <br />) +
1.5cm +  and 3cm +
free +  and distinct +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
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) +, e Asia (Japan) +  and also in Europe +
not +  and aggregated +
0–700 m +
erect-ascending +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
glabrous +  and strigose +
unisexual +  and bisexual +
not +  and aggregated +
obovoid-globose +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
not +  and aggregated +
not +  and aggregated +
Moist suburban forests and woodlands, roadsides +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
crassinucellate +
opposite +  and alternate +
winter-deciduous +
serrate +  and entire +
toothed +, unlobed +  and lobed +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
inferior +  and superior +
biseriate +  and clustered +
collateral +  and marginal +
0.5 cm5 mm <br />0.005 m <br /> (2.2 cm22 mm <br />0.022 m <br />) +
0.9 cm9 mm <br />0.009 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
0 (?) +  and 4 (?) +
0.2 cm2 mm <br />0.002 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
free +  and distinct +
1.7 cm17 mm <br />0.017 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0 +  and 34 +
1.2 cm12 mm <br />0.012 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
channeled +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
Flowering Mar–Jun +  and fruiting Jun–Aug. +
adnate +, free +, connate +  and distinct +
Trans. Linn. Soc. London +
not arillate +
persistent +
free +  and distinct +
glandular-fimbriate +  and serrulate +
reflexed +  and spreading +
oblong-ovate +  and more or less orbiculate +
tubelike +
Illustrated +  and Introduced +
free +  and distinct +
flexuous +
1 +  and 30 +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
persistent +
distinct +
not elongate +
Corchorus japonicus +
Kerria japonica +
species +
inconspicuous +
rhizomatous +  and open +
shrub +  and suckering +