Bidens tripartita L.

Burr Marigold

Annual herb to 1 m tall, glabrous or slightly hairy. Stems erect, hardly branched. Leaves to 9 cm long, usually 3-lobed, with toothed leaflets. Capitula to about 2.5 cm across, in leafy corymbs; autumn to winter. Florets yellow. Pappus of 2-4 short bristles.

Europe

Source: Jeanes, J. (2002). Asteraceae. In: Spencer, R.. Horticultural Flora of South-eastern Australia. Volume 4. Flowering plants. Dicotyledons. Part 3. The identification of garden and cultivated plants. University of New South Wales Press.

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kingdom Plantae
phylum   Tracheophyta
class    Magnoliopsida
superorder     Asteranae
order      Asterales
family       Asteraceae
genus        Bidens L.