In case you don´t know it, the roadside ditches of the highways have an impressive biodiversity, they are readily accessible and they contain an ample sample of plants of the forests and fields by which they pass. The slopes of Madeira mountains usually have a great slope and to accede to them is often impossible without a scaling equipment. For that reason the highways and the typical levadas that canalize the water of mountains towards the terraces of the cultures and the populations are so practical for the botanists.
In one of my shutdowns, already a little navigated as much scanning with the view the rocky slopes that bordered the highway, suddenly I saw a small plant two meters of height whose white flowers seemed luminous lanterns in the dark of the laurisilva forest by which the highway passed. It was a Saxifraga pickeringii, a rare Madeira endemism that seen close it moves us by the beauty of its flowers and their fleshy leaves.