''Polygonum oxyspermum'' is a coastal species of flowering plant in the buckwheat family. It is native to Europe, primarily along the shores of the Atlantic, the North Sea, and the Baltic Sea, from France and Ireland to Finland and Russia. It is also naturalized in eastern Canada and in the US State of

Maine Maine () is a state in the New England and Northeastern regions of the United States. It borders New Hampshire to the west, the Gulf of Maine to the southeast, and the Canadian provinces of New Brunswick and Quebec to the northeast and north ...

Description

''Polygonum oxyspermum'' is green or blue-green. Annual, stems prostrate, generally run along the surface of the ground but sometimes do rise above ground level. They can be as much as long. Leaves are up to long. Flowers are green, white or pink, in axillary clusters. ;Subspecies Three subspecies are widely recognized, although some authors prefer to regard them as distinct species. * ''Polygonum oxyspermum'' subsp. ''oxyspermum'' – northern Europe; naturalized in

Nova Scotia Nova Scotia ( ; ; ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. Nova Scotia is Latin for "New Scotland". Most of the population are native Eng ...

* ''Polygonum oxyspermum'' subsp. ''raii'' (Bab.) D.A.Webb & Chater northern Europe; naturalized in

Prince Edward Island Prince Edward Island (PEI; ) is one of the thirteen Provinces and territories of Canada, provinces and territories of Canada. It is the smallest province in terms of land area and population, but the most densely populated. The island has seve ...

New Brunswick New Brunswick (french: Nouveau-Brunswick, , locally ) is one of the thirteen provinces and territories of Canada. It is one of the three Maritime provinces and one of the four Atlantic provinces. It is the only province with both English and ...

Québec Quebec ( ; )According to the Government of Canada, Canadian government, ''Québec'' (with the acute accent) is the official name in Canadian French and ''Quebec'' (without the accent) is the province's official name in Canadian English is ...

Newfoundland Newfoundland and Labrador (; french: Terre-Neuve-et-Labrador; frequently abbreviated as NL) is the easternmost province of Canada, in the country's Atlantic region. The province comprises the island of Newfoundland and the continental region ...

* ''Polygonum oxyspermum'' subsp. ''robertii'' (Loisel.) Akeroyd & D.A.Webb –

Italy Italy ( it, Italia ), officially the Italian Republic, ) or the Republic of Italy, is a country in Southern Europe. It is located in the middle of the Mediterranean Sea, and its territory largely coincides with the homonymous geographical re ...

Acta Plantarum, ''Polygonum robertii'' Loisel. – Poligono di Robert
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References

External links

photos * ttp://www.habitas.org.uk/flora/species.asp?item=3746 Flora of Northern Ireland oxyspermum Flora of Europe Plants described in 1824 {{Polygonaceae-stub