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Common Name: False Buckwheat
Polygonum sagittatum is an annual plant that can grow up to 0.60 metres tall.
It has medicinal uses.
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[
N. America - Newfoundland to Northwest Territory, south to Florida. Naturalised in Ireland.
]. Ditches in Kerry[
Succeeds in an ordinary garden soil[
] but prefers a moisture retentive not too fertile soil in sun or part shade[
]. Repays generous treatment[
Plants seem to be immune to the predations of rabbits[
The plant has been used with success in the treatment of nephritic colic, relieving the pains caused by gravel[
Seed - sow spring in situ.