It is a plant that grows in a «rupicolous environment,it grows in the cracks of the limestone cliffs, on the earthy terraces of the rock bars shales or in the scree of serpentines.».
As you can see, it grows in some extreme places.
Already in 1898, the herbalists Julien Foucaud and Eugene Simon in their book "Three weeks of herbs in Corsica" spoke of the «very rare Brassica insularis».
Very quickly, It is listed as a priority species in the Red Book of the threatened flora of France. Nowadays, she is threatened. Who are these predators? Men who practice climbing, goats and other invasive plants.
This is why some organizations want to protect their species,they organize citizen actions with schools and others passionate about their heritage.