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NODDING BUR-MARIGOLD Bidens cernua (Asteraceae) Height to 70cm. Similar to Trifid Bur-marigold but with hairy stems. Grows in damp ground and shallow water. FLOWERS in nodding heads, 15-30mm across with yellow disc florets and 5-8 leaf-like bracts below (Jul-Oct). FRUITS are narrow and flattened with 3-4 barbed bristles. LEAVES are lanceolate, unstalked and undivided. STATUS-Locally common in S.