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Persicaria perfoliata - L.

Common Name Asiatic tearthumb
Family Polygonaceae
USDA hardiness Coming soon
Known Hazards Although no specific mention has been made for this species, there have been reports that some members of this genus can cause photosensitivity in susceptible people. Many species also contain oxalic acid (the distinctive lemony flavour of sorrel) - whilst not toxic this substance can bind up other minerals making them unavailable to the body and leading to mineral deficiency. Having said that, a number of common foods such as sorrel and rhubarb contain oxalic acid and the leaves of most members of this genus are nutritious and beneficial to eat in moderate quantities. Cooking the leaves will reduce their content of oxalic acid. 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 thickets and by rivers in lowland all over Japan[58]. Moist, open, uncultivated land at elevations of 900 - 1400 metres in Nepal[272].
Range E. Asia - China, Japan, Korea, India.
Edibility Rating    (1 of 5)
Other Uses    (0 of 5)
Weed Potential Yes
Medicinal Rating    (1 of 5)
Care
Moist Soil Wet Soil Semi-shade Full sun
Persicaria perfoliata Asiatic tearthumb


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Persicaria perfoliata Asiatic tearthumb
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Summary


Physical Characteristics

 icon of manicon of flower
Persicaria perfoliata is a ANNUAL/PERENNIAL growing to 1.8 m (6ft). It is in flower from July to August, and the seeds ripen from August to October. The species is hermaphrodite (has both male and female organs) and is pollinated by Insects.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in semi-shade (light woodland) or no shade. It prefers moist or wet soil.

UK Hardiness Map US Hardiness Map

Synonyms

Persicaria perfoliata.

Habitats

Edible Uses

Tender young leaves and shoots - raw or cooked. Used as a vegetable[272]. Seed - raw or cooked. It is rather small and fiddly to utilize. The ripe fruits (seeds) are eaten fresh, especially by children[272].

Medicinal Uses

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The whole plant is depurative, diuretic and febrifuge. It is also used to stimulate blood circulation[147]. A decoction is used in the treatment of dysentery, enteritis, boils and abscesses, poisonous snake bites, haematuria, cloudy urine and traumatic injuries[147]. The juice of the leaves is used in the treatment of backaches[272].

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Other Uses

None known

Cultivation details

We have very little information on this species and do not know if it is hardy in Britain, though judging by its native range it should succeed outdoors in most parts of the country. We are not sure if it is a perennial or annual. The following notes are based on the general needs of the genus. Succeeds in an ordinary garden soil[1] but prefers a moisture retentive not too fertile soil in sun or part shade[200]. Repays generous treatment[1]. Plants seem to be immune to the predations of rabbits[233].

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Propagation

Seed - sow spring in a cold frame. Germination is usually free and easy. When they are large enough to handle, prick the seedlings out into individual pots and plant them out in the summer if they have reached sufficient size. If not, overwinter them in a cold frame and plant them out the following spring after the last expected frosts.

Other Names

If available other names are mentioned here

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 NameEdibility RatingMedicinal Rating
Polygonum persicariaRed Leg, Spotted ladysthumb12

 

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Botanical References

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