Meconopsis cambrica (L.) Vig., 1814
Common names: Welsh poppy [En], Pavot du pays de Galles, Pavot jaune [Fr], Schijnpapaver [Nl]
Visé, LIEGE ● Belgium
Description: Perennial plant with 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 is the only member of the Meconopsis genus native to Europe.
Biology : It spreads easily from the numerous small black seeds produced in the summer.
Habitat: damp, shady places on rocky ground In its most western locations, it is increasingly found on more open ground with less cover. It is especially well adapted to colonising gaps and crevices in rocks and stones. This habit has enabled it to colonise the urban environment, growing between paving slabs and at the edges of walls.
Distribution: Native to Western Europe, including south-western England, Wales, Ireland, Pyrenees, Spain, Central French plateau and Switzer Jura. It is probably not native to Belgium, but well naturalised on the place I found it.
Wikipedia, Welsh poppy