Polygonum patulum

Polygonum patulum, called tree hogweed,^[2] is a species of flowering plant in the knotweed family. It is native to the Mediterranean region, eastern Europe, the Caucasus, Siberia, Central Asia, Mongolia, and the Province of Xinjiang in northwestern China.^[3][4][5] It has also become sparingly naturalized in scattered locations in Australia and North America.^[2][6]

Polygonum patulum
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Order:	Caryophyllales
Family:	Polygonaceae
Genus:	Polygonum
Species:	P. patulum
Binomial name
Polygonum patulum M.Bieb. 1808
Synonyms[1]
Synonymy Polygonum bellardii var. gracilius Ledeb. Polygonum bellardii var. patulum (M. Bieb.) Meisn. Polygonum bordzilowskii Klokov Polygonum cretaceum Kom. Polygonum gracilius (Ledeb.) Klokov Polygonum kotovii Klokov Polygonum novoascanicum subsp. cretaceum Tzvelev Polygonum patulum f. gracilius (Ledeb.) I. Grinţ. Polygonum patulum var. gracilius (Ledeb.) Rouy Polygonum patulum subsp. kotovii Soó Polygonum salinum Baranov & Skvortsov Polygonum spectabile Lehm.

Description

Polygonum patulum is an erect or semi-erect annual herb up to 80 cm (31 in) tall. Leaves are green or blue-green, up to 5 cm (2.0 in) long. Flowers are green, pink, or white.^[7]