In the valley of the Ruffa Torrent, between Ricadi and Spilinga, an oriental fern has been discovered belonging to the  family of Blechnacea, an ancient surviving example of Mediterranean flora.  There  are numerous specimens of the fern.

Here it has managed to find its natural habitat, which is generally in damp ravines in hilly areas characterised by excessive humidity, a scarcity  of light and limited daily and annual variations in temperature.

The discovery is important, not only for the rarity of the type of fern, but above all because it has been located in very few other parts of Italy.  The bed of the Ruffa torrent is the richest in this type of fern.