Trifid Bur-marigold - Bidens tripartita
Very variable plant to about 50 cm. Erect stems. Leaves opposite, usually three lobed occasionally 5 lobed with lanceolate, coarsely toothed divisions. Leaf stalks are short and winged. Flowerheads yellow 10 to 25 mm. Erect in branched clusters. Achenes with 3 or 4 barbed bristles.
Damp habitats on mildly acid or calcareous soils.
July to September.
Locally frequent in England but less so in Scotland and Wales.
Occasional in Leicestershire and Rutland. In the 1979 Flora survey of Leicestershire it was found in 50 of the 617 tetrads.
Leicestershire & Rutland Map
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