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Uses

Toxic parts

The leaves contain small quantities of hydrogen cyanide (prussic acid). In small quantities, hydrogen cyanide has been shown to stimulate respiration and improve digestion, it is also claimed to be of benefit in the treatment of cancer. In excess, however, it can cause respiratory failure and even death.

Edible uses

Notes

Young leaves - cooked[1][2]. The leaves contain a small amount (0.002%) of hydrogen cyanide and are also a rich source of vitamin C (200mg per 100g)[3]. Some caution is advised, see the notes above on toxicity. Fruit[2]. No more details are given, but this report is somewhat suspect, the plant does not produce a fleshy fruit and the seed case certainly does not look edible[K]. The fruit is a dry, somewhat plump achene about 5mm in diameter[4].

Fruit

Leaves

Material uses

There are no material uses listed for Kerria japonica.

Medicinal uses(Warning!)

A decoction of the flowering shoots is used in the treatment of coughs and women's complaints[5][3].

Unknown part

Ecology

Ecosystem niche/layer

Ecological Functions

Nothing listed.

Forage

Nothing listed.

Shelter

Nothing listed.

Propagation

Seed - we have no details on this species but suggest sowing the seed as soon as it is ripe in a cold frame. Sow stored seed as soon as possible in a cold frame, it is likely to require a period of cold stratification. When they are large enough to handle, prick the seedlings out into individual pots and grow them on in the cold frame for their first winter. Plant them out into their permanent positions in late spring or early summer, after the last expected frosts.

Division of suckers, removed with care from established plants during the dormant season[4]. Larger clumps can be replanted direct into their permanent positions, though it is best to pot up smaller clumps and grow them on in a cold frame until they are rooting well. Plant them out in the spring. Cuttings of young shoots. Young basal shoots in early summer work quite well. Harvest the shoots when they are about 10 - 15cm long with plenty of underground stem. Pot them up into individual pots and keep them in light shade in a cold frame or greenhouse until they are rooting well. Plant them out in the summer.

Layering.

Practical Plants is currently lacking information on propagation instructions of Kerria japonica. Help us fill in the blanks! Edit this page to add your knowledge.



Cultivation

Succeeds in most aspects in any good loamy soil[6]. Succeeds in very poor soils[7]. Grows well in heavy clay soils. Prefers a moist well-drained soil in a sunny position with shade from the midday sun[4].

Hardy to about -20°c[8]. Plants are moderately fast growing[7]. They sucker freely and can be invasive[7]. Some named forms have been developed for their ornamental value[9]. This species is notably resistant to honey fungus[4].

The flowers are said to be usually unisexual but we do not know if the plants are dioecious or monoecious.

Crops

Problems, pests & diseases

Associations & Interactions

There are no interactions listed for Kerria japonica. Do you know of an interaction that should be listed here? edit this page to add it.

Polycultures & Guilds

There are no polycultures listed which include Kerria japonica.

Descendants

Cultivars

Varieties

None listed.

Subspecies

None listed.

Full Data

This table shows all the data stored for this plant.

Taxonomy
Binomial name
Kerria japonica
Genus
Kerria
Family
Rosaceae
Imported References
Edible uses
Medicinal uses
Material uses & Functions
Botanic
Propagation
Cultivation
Environment
Cultivation
Uses
Edible uses
None listed.
Material uses
None listed.
Medicinal uses
None listed.
Functions & Nature
Functions
Provides forage for
Provides shelter for
Environment
Hardiness Zone
4
Heat Zone
?
Water
moderate
Sun
full sun
Shade
light shade
Soil PH
Soil Texture
Soil Water Retention
Environmental Tolerances
    Ecosystems
    Native Climate Zones
    None listed.
    Adapted Climate Zones
    None listed.
    Native Geographical Range
    None listed.
    Native Environment
    None listed.
    Ecosystem Niche
    None listed.
    Root Zone Tendancy
    None listed.
    Life
    Deciduous or Evergreen
    Herbaceous or Woody
    Life Cycle
    Growth Rate
    Mature Size
    2 x 2 meters
    Fertility
    ?
    Pollinators
    Flower Colour
    ?
    Flower Type

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    "image:Kerria japonica1.jpg|248px" cannot be used as a page name in this wiki.

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    References

    1. ? 1.01.1 Tanaka. T. Tanaka's Cyclopaedia of Edible Plants of the World. Keigaku Publishing (1976-00-00)
    2. ? 2.02.12.2 Kunkel. G. Plants for Human Consumption. Koeltz Scientific Books ISBN 3874292169 (1984-00-00)
    3. ? 3.03.13.23.3 Duke. J. A. and Ayensu. E. S. Medicinal Plants of China Reference Publications, Inc. ISBN 0-917256-20-4 (1985-00-00)
    4. ? 4.04.14.24.34.44.5 Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press ISBN 0-333-47494-5 (1992-00-00)
    5. ? 5.05.1 Stuart. Rev. G. A. Chinese Materia Medica. Taipei. Southern Materials Centre ()
    6. ? F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press (1951-00-00)
    7. ? 7.07.17.2 Davis. B. Climbers and Wall Shrubs. Viking. ISBN 0-670-82929-3 (1990-00-00)
    8. ? Phillips. R. & Rix. M. Shrubs. Pan Books ISBN 0-330-30258-2 (1989-00-00)
    9. ? Thomas. G. S. Ornamental Shrubs, Climbers and Bamboos. Murray ISBN 0-7195-5043-2 (1992-00-00)
    10. ? Cite error: Invalid <ref> tag; no text was provided for refs named PFAFimport-11
    11. ? [Flora of China] (1994-00-00)

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