What is feen moss?

As an AI language model, I do not have reliable information about a "feen moss." However, I assume you might be referring to "feather moss" or "lichen." Feather Moss is a bryophyte (non-vascular plant) belonging to the family Hypnaceae. It grows on rocks, trees, and soil, forming dense mats that can range in color from light green to yellow-brown. It is commonly found in wet and moist environments such as forests, bogs, and wetlands.

Lichens, on the other hand, are composite organisms consisting of a fungus and an alga or a cyanobacterium. They grow on rocks, soil, and trees, and have a wide range of forms and colors. They are widespread and abundant in most habitats, from deserts to rainforests, and can survive in extreme conditions, such as on the surface of rocks in polar regions. Lichens are important indicators of air pollution and climate change and have been used as traditional medicines and dyes by people across the world.