Annual plant spreading from areas East of the Mediterranean through Europe as far to the North like Finland is.
It has pagefuls of vernacular names, here’s a random sampler of several English versions only: Flower-of-the-Hour, Bladder Hibiscus, Bladder Ketmia, Bladder Weed, Modesty, Rosemallow, Venice Mallow, Shoofly, Crow Poppy and so on.
This painting was on the cover of
[Seedlings of arable land weeds]
Soil Potection Station of the Capital of Hungary, publicaion sponsored by the Hungarian Ministry for Agriculture, pp. 1-267, Budapest, Hungary (2.000)