Rotten wood moss is slender or thick, yellow green or dark green, slightly brownish green in color, and glossy. The stem crawls and branches densely. The leaves are curved, almost sickle shaped, with a long oval base, concave inward, and long pointed; The leaf edge is slightly curled, with fine teeth on the upper part; Middle ribs are often missing. The leaf cells are diamond shaped or elongated diamond shaped, with a yellow base, and the horn cells are relatively swollen and golden yellow. There are a few short cells above them, which are often transparent. Dioecious plants, rare dioecious plants with the same bract, or leaf bearing male bract plants with different bracts. The inner female bracts have longitudinal folds, long haired tips, and fine teeth on the upper edges.