Mycena haematopus is a species of mushroom belonging to the Mycenaceae family. It is commonly found in decaying wood and forested areas, particularly in temperate regions. The mushroom features a distinctive reddish-brown cap and a slender, pale stem, making it easily recognizable. This species is known for its small size and delicate structure. Mycena haematopus is not considered edible and may contain toxic compounds, so caution is advised when encountering it in the wild. Its ecological role includes contributing to the decomposition of organic matter, which helps maintain forest health.