Oak Moss Fragrance The Oakmoss Fragrance was derived from a lichen called Oakmoss. Itâs not really a flowering plant but instead, it is a lichen, a combination of fungus and algae that is extracted because of its aroma. It can be found on trunks of the oak. The Oakmoss Fragrance is an extremely strong scent that is very similar to a wet jungle ground. This fragrance is calming and cool.