Mosses and lichens trappings of ubacs

Mosses and lichens adorning trees of this shaded slope are plants called "epiphytes" (that grow on other plants) and are not parasites for their supports. Lichens are the result of a symbiosis between a fungus and an alga. The carpet of mosses and "clumps" of lichens that color the wood of this ubac slope or north-facing slope (slope which receives little sunshine) testifies to the fact that these plants mainly appreciate wet and cool areas.