Dried plant. © Edinburgh Royal Botanic Garden. Plant from Iran.

Line drawing from Flora Palaestina. Scanned by Missouri Botanical Garden.

Line drawing in Britton, N.L., and A. Brown. 1913. An illustrated flora of the northern United States, Canada and the British Possessions. Vol. 1: 662.

Common Name

Tree Hogweed




Introduced annual forb to 1m tall. Leaves alternating up the stems, with a sheath at the base. Leaves 1-5cm long, 2-15mm wide, hairless, margins flat or slightly wavy, tips pointed. Flowers sometimes small (less than 3mm across), with 5 'petals' joined at the base, pinkish green, in clusters of 1-3, sometimes raceme -like along the leafless part of the stems.

PlantNET description: