oozes blood from the rotting logs

Size
Cap diameter: 1-4 centimetres
Lifespan
Unknown
Diet
Saprotrophic, deriving nutrients by decomposing dead wood, absorbing organic compounds from decaying logs and stumps.
Habitat
Thrives in damp, shaded forest environments on rotting hardwood logs, decaying tree stumps, and woodchip mulch.
Range
Found throughout New Zealand, particularly across damp forested areas of both North and South Islands with dead wood.
Endemism
Introduced
Main Threats
No major conservation threats exist. Intensive habitat clearance and removal of coarse woody debris can impact local colonies.
Population
An introduced species with secure and stable presence in New Zealand. Total population size is unquantified due to sporadic fruiting.
Conservation Status
Not Threatened
Human Risk
harmless
Handling Note
inedible but harmless, do not eat
Conservation Note
Introduced fungus; commonly found in native and exotic forests, not subject to conservation assessment.
Te Ao Māori
As an introduced fungal species native to the Northern Hemisphere, the Bleeding Mycena possesses no traditional Māori name. It has no history within pre-colonial indigenous storytelling. It was likely introduced to New Zealand accidentally through imported timber products or soil organic matter. Today this distinctive little mushroom holds a special place among contemporary local naturalists, foragers and ecological photographers. They are fascinated by its dramatic saprotrophic features. It serves as an excellent educational tool in modern citizen science initiatives. It highlights the hidden diversity of wood-decaying fungi within native and exotic forest habitats. The lack of traditional name reflects its origin. The modern recognition reflects its distinctiveness. The fungus remains an outsider. It is valued by some. It is ignored by others. It grows regardless. The culture adapts. The fungus persists.
The damp floor of a mature woodland contains many hidden marvels. Few are as captivating as this small, delicate mushroom. The Bleeding Mycena is globally celebrated for its unique colouration. It has a remarkable physiological trait that gives the species its memorable common name. Emerging from decaying wood, the cap is initially bell-shaped. It expands into a broader umbrella form while retaining a central bump. Its colour ranges from a soft pinkish-brown to a deep burgundy. It fades near the finely scalloped edges. The most astonishing characteristic is its ability to exude a dark, reddish-purple latex fluid. This happens when any part of the fruiting body is broken. The sap closely resembles drops of blood. It pools along the fractured flesh of the stem. Beneath the cap, the narrow gills are crowded together. They are initially pale white. They mature into a soft pinkish-grey. The slender, hollow stem is covered in a delicate, powdery coating when young. It shares the same wine-red pigmentation as the cap. The visual is striking. The mechanism is defensive. Beyond its striking visual appearance, this organism serves an essential ecological purpose. It acts as a wood-decaying saprotroph within forest ecosystems. It colonises dead hardwood logs and rotting tree stumps. It establishes an invisible network of microscopic threads known as mycelium within the timber. By secreting specialised enzymes, the fungus breaks down complex organic polymers like cellulose and lignin. It converts dense wood into accessible nutrients that enrich the surrounding soil. This decomposition process is vital for forest health. It fosters new plant growth. It drives the carbon cycle. Interestingly, this species is also known to exhibit weak bioluminescence. Its mycelial threads emit a faint green glow visible in complete darkness. When environmental conditions are optimal during wet autumn periods, the mushroom releases thousands of microscopic, white spores from its gill surfaces. These spores are carried away on gentle air currents. They seek out new pieces of damp wood to begin the lifecycle over again. The glow is subtle. The decay is steady. Encounters with this distinctive fungus provide an exciting highlight for amateur mycologists and nature walk enthusiasts throughout New Zealand. Because it grows in tight, crowded clusters, a single log can host dozens of tiny caps. This creates a spectacular visual display against the mossy background. Its reliance on dead timber means it is highly sensitive to forest management practices. These practices often remove fallen logs and coarse woody debris. Leaving dead wood to rot naturally in regional parks ensures that these specialised decomposers can continue to thrive. Documenting sightings through modern citizen science platforms helps map regional distribution. This offers insights into the health of local saprotrophic communities. Spotting the deep burgundy caps of this intriguing little mushroom offers a wonderful glimpse into the complex world of fungal ecology. The fungus does not care for admiration. It cares for substrate. It finds it in the log. And that seems to be enough.