Moss is a soft plant that usually grows to be between 0.4 and 4 inches (1-10 cm) tall. Mosses usually grow close together in clumps or mats in damp, shady locations. Mosses do not produce seeds or flowers. Instead they produce spore capsules. These capsules can be seen in the photo on the longer stalks.
Clue #1 This is soft.
Clue #2 It is not fur.
Clue #3 It grows in shady places.