Ragweed - Ambrosia artemisiifolia

    Description

    Medium to tall plant, not aromatic. Stems branched and angled, often reddening and becoming somewhat woody below. Leaves mostly opposite, greyish below usually pinnately lobed with lanceolate divisions. Male Flowerheads greenish tallow 3 to 5 mm in slender spikes. Female flowers inconspicuous below, at the base of the upper leaves. Flower bracts with spiny teeth.

    Identification difficulty
    Habitat

    Disturbed ground

    When to see it

    August to October

    Life History

    Annual

    UK Status

    Not common in Britain.

    VC55 Status

    Uncommonn in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in only 2 of the 617 tetrads.

    Leicestershire & Rutland Map

    UK Map