Lichens on rocks are flat, on trees they are stringy,' he explains. Moss, on the other hand, is much softer and spongier than lichen. 'Moss generally grows up to two inches tall,' says Scott.

Lichens are nearly everywhere — odd growths that appear as crusty patches and splotches on tree trunks, limbs, rocks, bare soil, stone walls, tombstones, wooden fences. Regardless, lichens often ...