Large pale-yellow flowers, 50-80mm wide, in leafy spikes. Sepals red/red-striped. Seed capsule with reddish hairs. Leaves lanceolate, wavy edged. Upper leaves narrower, with white mid-rib. Red-based stem-hairs. Height to 1.5m.
Casual on waste ground, roadsides, railway embankments.
Wrong identification. Photographs not Large Evening-primrose, probably a hybrid.
Correction: Paul Green, Co.Wexford