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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  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Moist Soil Semi-shade Full sun

Summary

Rumex japonicus


Rumex japonicus
   
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 Jun to July. The flowers are hermaphrodite (have both male and female organs) and are pollinated by Wind.Suitable for: light (sandy), medium (loamy) and heavy (clay) soils and prefers well-drained soil. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist soil.

Synonyms

Habitats
 Bog Garden;
Edible Uses
Edible Parts: Leaves;  Seed.
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].
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
Other Uses
Dye.

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].
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].
Propagation
Seed - sow spring in situ. Division in spring.

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Other Names
Found In
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 NameEdibility RatingMedicinal Rating
Rumex abyssinicusSpinach Rhubarb10
Rumex acetosaSorrel, Garden sorrel53
Rumex acetosellaSheeps Sorrel, Common sheep sorrel43
Rumex alpinusAlpine Dock, Munk's rhubarb42
Rumex angiocarpusCommon sheep sorrel10
Rumex aquaticusRed Dock, Western dock13
Rumex arcticusArctic Dock21
Rumex arifoliusMaiden Sorrel10
Rumex berlandieriamamastla10
Rumex browniiSwamp Dock20
Rumex bucephalophorusred dock10
Rumex conglomeratusSharp Dock, Clustered dock12
Rumex crispusCurled Dock, Curly dock23
Rumex daiwoosour dock12
Rumex dentatustoothed dock11
Rumex gmelinii 10
Rumex graminifoliusGrassleaf sorrel10
Rumex hastatus 22
Rumex hydrolapathumGreat Water Dock11
Rumex hymenosepalusCanaigre, Canaigre dock22
Rumex longifoliusdooryard dock11
Rumex maritimusGolden Dock12
Rumex mexicanusMexican Dock12
Rumex nepalensis 12
Rumex obtusifoliusRound-Leaved Dock, Bitter dock12
Rumex occidentalisWestern Dock11
Rumex patientiaHerb Patience31
Rumex paucifoliusFewleaved Dock, Alpine sheep sorrel10
Rumex pulcherFiddle Dock10
12
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Houtt.
Botanical References
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Subject : Rumex japonicus  

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