Irish wildflowers BSBI map

Trifid Bur-marigold, Bidens tripartita, Scothóg leathan
Photographs: Lismore, Co.Waterford

Trifid Bur-marigold
Bidens tripartita
Scothóg leathan
Family: Asteraceae


Flowering July-September. Annual. Native.

Ray-less yellow flower-heads with black-streaked, sepal-like inner bracts and long, leaf-like outer bracts. Opposite, stalked lower leaves, many usually with 1-2 pairs of lobes. A hairless plant with stout erect stems. Height to 70cm.

Nutrient-rich gravel or mud by ponds, rivers, marshes.

Similar: Nodding Bur-marigold, B. cernua has undivided leaves

Trifid Bur-marigold, Bidens tripartita, Scothóg leathan

Trifid Bur-marigold, Bidens tripartita, Scothóg leathan
Trifid Bur-marigold, Bidens tripartita, Scothóg leathan

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