This is an annual plant which grows to a height of about 60 cm with a stout, hairy, well-branched stem. Blooming from July to October, it has rich yellow flowers (20-25 mm across) which are backed by two rows of large, sepal-like bracts. The flowers are composed of slightly untidy, ridged, spreading, strap-shaped petals which have deeply scalloped edges. The unstalked, opposite lanceolate leaves are toothed. This is not a native plant and it belongs to the Asteraceae family.
I first recorded this plant in County Wexford in 2010 and photographed it again a year later.
If you are satisfied you have correctly identified this plant, please submit your sighting to the National Biodiversity Data Centre