Photographs: Co. Cork and Co. Waterford

Creeping Yellow-cress Rorippa sylvestris Biolar buí reatha Family: Brassicaceae Flowering June-September. Perennial. Native. Yellow flowers on erect flowering stems, the petals approx 2x long as sepals, are followed by linear ascending fruit, 2x long as pedicels. Leaves have lanceolate toothed leaflets, stem-leaves pinnate or deeply pinnate. Creeping roots, stems decumbent or more/less erect, to 60cm. Spreads by seed and root fragments. Identified by Paul Green Scattered Irish distribution on bare, damp ground by lakes and rivers. Similar: Marsh Yellow-cress and Northern Yellow-cress

Creeping Yellow-cress, Rorippa sylvestris, Biolar buí reatha