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Rumex_japonicus - Houtt.

Common Name
Family Polygonaceae
USDA hardiness Coming soon
Known Hazards Plants can contain quite high levels of oxalic acid, which is what gives the leaves of many members of this genus an acid-lemon flavour. Perfectly alright in small quantities, the leaves should not be eaten in large amounts since the oxalic acid can lock-up other nutrients in the food, especially calcium, thus causing mineral deficiencies. The oxalic acid content will be reduced if the plant is cooked. People with a tendency to rheumatism, arthritis, gout, kidney stones or hyperacidity should take especial caution if including this plant in their diet since it can aggravate their condition[238].
Habitats Wet meadows and ditches in lowland all over Japan[58]. Field margins, streambanks and wet valleys from sea level to 3400 metres in China[266].
Range E. Asia - China, Japan, Korea.
Edibility Rating    (2 of 5)
Other Uses    (1 of 5)
Weed Potential No
Medicinal Rating    (0 of 5)
Care (info)
Moist Soil Semi-shade Full sun
Rumex_japonicus


Rumex_japonicus

 

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Summary


Physical Characteristics

 icon of manicon of flower
Rumex_japonicus is a PERENNIAL growing to 1 m (3ft 3in). It is in flower from May to June, and the seeds ripen from June to July. The species is hermaphrodite (has both male and female organs) and is pollinated by Wind.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.

UK Hardiness Map US Hardiness Map

Synonyms

Plant Habitats

Edible Uses

Leaves - cooked[105, 177]. They can be used as a vegetable or added to soups[183]. The leaves can also be dried for later use[183]. Seed - cooked[105, 177]. It is used with rice or ground into a powder for making dumplings[183].

References   More on Edible Uses

Medicinal Uses

Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.


None known

References   More on Medicinal Uses

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Other Uses

Although no specific mention has been made for this species, dark green to brown and dark grey dyes can be obtained from the roots of many species in this genus, They do not need a mordant[168].

Special Uses

References   More on Other Uses

Cultivation details

We have very little information on this species and do not know if it will be hardy in Britain, though judging by its native range it should succeed outdoors in most parts of this country. The following notes are based on the general needs of the genus. Succeeds in most soils but prefers a deep fertile moderately heavy soil that is humus-rich, moisture-retentive but well-drained and a position in full-sun or part shade[200].

References   Carbon Farming Information and Carbon Sequestration Information

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Plant Propagation

Seed - sow spring in situ. Division in spring.

Other Names

If available other names are mentioned here

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Found In

Countries where the plant has been found are listed here if the information is available

Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status

IUCN Red List of Threatened Plants Status :

Related Plants
Latin NameCommon NameHabitHeightHardinessGrowthSoilShadeMoistureEdibleMedicinalOther
Rumex japonicus Perennial1.0 -  LMHSNM201

Growth: S = slow M = medium F = fast. Soil: L = light (sandy) M = medium H = heavy (clay). pH: A = acid N = neutral B = basic (alkaline). Shade: F = full shade S = semi-shade N = no shade. Moisture: D = dry M = Moist We = wet Wa = water.

 

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Expert comment

Author

Houtt.

Botanical References

58266

Links / References

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