Common Split Gill
Small, white, hairy, fan-shaped caps; beneath, whitish or pinkish gill-like folds that split toward the edge. Grows in clusters on dead branches. Year-round. Cap fan-shaped; whitish to grayish; texture dry, hairy, leathery. Underside whitish to grayish to pinkish; hairy, with gill-like folds that are split lengthwise to the cap margin. Stalk not present, or tiny. Spore print white. Spores magnified are cylindrical, smooth.
There are no lookalikes in Missouri.