The Welsh poppy (Meconopsis cambrica) (2n=28) is a perennial plant of the family Papaveraceae. Its habitat is damp shady places on rocky ground, and it is native to south-western England, Wales, Ireland and Western Europe. In its most western locations, it is increasingly found on more open ground with less cover.
It has pinnately divided leaves. The flower is distinctively yellow or orange with four petals, and hairy green sepals that fall off quickly after the flower opens. It spreads easily from the numerous small black seeds produced in the summer. It is especially well adapted to colonising gaps and crevices in rocks and stones. This habit has enabled it to colonise the urban emvironment, growing between paving slabs and at the edges of walls.
It was originally classified as Papaver cambricum and may be referred to as such in older texts. It is the only member of the Meconopsis (Papaveraceae with yellow latex) genus native to Europe.