Persicaria sagittata is an extremely variable species and is known from distinct populations in both Asia and North America. They have been treated as distinct in the past (the Asia form being treated as Persicaria sieboldii). Recent molecular analyses of North American and eastern Asian populations show that these disjunct populations are genetically somewhat divergent from each other. The degree of genetic divergence, however, strongly suggests that they can be recognized either as a single polymorphic species (Persicaria sagittata) or two distinct varieties of Persicaria sagittata, but they can hardly be treated as two distinct species[
Helxine sagittatum (L.) Raf.
Persicaria aestiva (Makino) Ohki
Persicaria anguillana Honda
Persicaria belophylla (Litv. ex Grigorjev) Kitag.
Persicaria sieboldii (Meisn.) Ohki
Polygonum aestivum (Makino) Makino
Polygonum anguillanum Koidz.
Polygonum paludosum (Kom.) Kom.
Polygonum sagittatum L.
Polygonum sieboldii Meisn.
Tasoba sagittata (L.) Raf.
Tracaulon sagittatum (L.) Small
Tracaulon sibiricum (Meisn.) Greene
Tracaulon sieboldii (Meisn.) Greene
Truellum aestivum (Makino) Soják
Truellum paludosum (Kom.) Soják
Truellum sagittatum (L.) Soják
Truellum sericeum (Nakai) Soják
Truellum sibiricum (Meisn.) Soják
Truellum sieboldii (Meisn.) Soják
Common Name: False Buckwheat
Persicaria sagittata is a scandent annual plant with small prickles along the stem. Stems can be unbranched or freely branched and around 30 - 200cm tall[
The plant is harvested from the wild for local use as a medicine..
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.
Moist shaded sites, meadows, pastures, fens, swamps, shorelines of ponds and streams; at elevations up to 1,000 metres[
]. Ditches in Kerry[
Species in this genus generally succeed in an ordinary garden soil, whilst preferring a moisture retentive not too fertile soil in sun or part shade[
]. They generally rpays generous treatment[
Most plants in this genus seem to be immune to the predations of rabbits[
We have no specific information for this species, but the seed of most, if not all, members of the genus is edible both raw and cooked, and is potentially a good source of amino acids. Unfortunately the seed is also usually rather small and fiddly to utilize[
The plant has been used with success in the treatment of nephritic colic, relieving the pains caused by gravel[
The plant contains a small amount of anthraquinone derivatives[
Seed - sow spring in situ.