Range & Status
Native; a Mediterranean-Atlantic annual. In Britain it is found south of a line from London to Bristol and along the South Wales coast.
In Cornwall it was once found rarely, but is now confined to just one wall at Trelissick (SW83). It used to grow in nursery beds at the base of the wall.
Habitat & Ecology
The top of a mortared wall.
It is threatened by the growth of climbing plants that dominate lower parts of the wall.
Trelissick is owned by the National Trust.