Photographs: County Waterford
Ray-less yellow flower-heads with black-streaked, sepal-like inner bracts.
Outer bracts long, leaf-like. Opposite, stalked lower leaves, many usually
with 1-2 pairs of lobes. Hairless plant with stout erect stems. Height to 70cm.
Nutrient-rich gravel or mud by ponds, rivers, marshes.
Similar: Nodding Bur-marigold, B. cernua
Trifid Bur-marigold. Lismore, County Waterford. July 2008