An annual of disturbed, nutrient-rich cultivated and waste ground, often occurring only as a casual. Lowland.
Until about 1940 C. urbicum occurred frequently as a casual, mainly as a seed impurity, and populations persisted in some areas, such as at Ridge in Dorset where it was present for over fifty years. Since 1970 it has only occurred as a rare casual.
As an archaeophyte C. urbicum has a Eurosiberian Temperate distribution.
There are no images in this gallery.