Beggarticks - Bidens frondosa

    Description

    Very similar to Trifid Bur-marigold (Bidens tripartita) but taller (to 1 metre) the leaves mostly pinnate with 3 to 5 separate leaflets. Flowerheads 10 to 20 mm outer flower bracts shorter than the blackish inner ones, rarely leaf-like. The lower leaves have an unwinged petiole, the terminal leaflet has a long, unwinged stalk. The tapered achenes have forwards-pointing barbs. Detailed examination of the plant is necessary for a safe id.

    Identification difficulty
    Habitat

    Found by rivers and canals, on damp and waste ground, and on tips in urban areas and ports.

    When to see it

    In flower during June, August, September and October.

    Life History

    Annual.

    UK Status

    Occasional in Britain but is now becoming more frequently naturalised by canals in the English Midlands.

    VC55 Status

    Uncommon but possibly increasing in Leicestershire and Rutland. It was first recorded in our area in 1988.

    Leicestershire & Rutland Map

    UK Map