''Polygonum patulum'', called tree hogweed,
[ is a species of flowering plant in the knotweed family. It is native to the Mediterranean region, eastern Europe, the ]Caucasus
The Caucasus () or Caucasia (), is a region between the Black Sea and the Caspian Sea, mainly comprising Armenia, Azerbaijan, Georgia, and parts of Southern Russia. The Caucasus Mountains, including the Greater Caucasus range, have historically ...
, Siberia, Central Asia, Mongolia, and the Province of Xinjiang
Xinjiang, SASM/GNC: ''Xinjang''; zh, c=, p=Xīnjiāng; formerly romanized as Sinkiang (, ), officially the Xinjiang Uygur Autonomous Region (XUAR), is an autonomous region of the People's Republic of China (PRC), located in the northwest ...
in northwestern China. It has also become sparingly naturalized in scattered locations in Australia and North America.[Atlas of Living Australia, ''Polygonum patulum'' M.Bieb., Tree Hogweed]
/ref>Biota of North America Program 2014 county distribution map
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Description
''Polygonum patulum'' is an erect or semi-erect annual herb up to tall. Leaves are green or blue-green, up to long. Flowers are green, pink, or white.[Flora of North America, ''Polygonum patulum'' M. Bieberstein, 1808. ]
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References
External links
line drawing, Flora of China Illustrations vol. 5, fig. 239, 3-4 photo of herbarium specimen at Missouri Botanical Garden
patulum
Flora of Europe
Flora of temperate Asia
Plants described in 1808
{{Polygonaceae-stub