Mediterranean Underwater Biodiversity Project


1/C Mediterranean tapeweed - Posidonia oceanica

An endemic phanerogam of the Mediterranean, spread only along the coasts of this basin. Other species belonging to the Posidonia genus are present along the southern coasts of Australia; As for the other phanerogam, the P. oceanica rhizome is a modified stem with roots coming from its ventral side, which by fixing themselves to the substratum, constitute the plant’s anchorage system and also absorb nutrients. Its vegetation tip is situated in the upper part of the rhizome where the leaves sprout in tufts. Its ribbon-like leaves have a rounded tip, and are about 1 cm wide and can be up to one meter in length.