- Size
- Berry: 2-5 mm diam.
- Lifespan
- Annual
- Diet
- Saprotrophic, decomposing dead wood of broadleaf trees and shrubs.
- Habitat
- On dead wood of broadleaf trees and shrubs in damp native forest.
- Range
- Found in native forests throughout New Zealand, particularly on dead broadleaf wood.
- Endemism
- Not endemic
- Main Threats
- Habitat disturbance from logging, fire, or heavy grazing affecting soil moisture.
- Population
- Common in native forests throughout New Zealand, particularly in autumn.
- Conservation Status
- Not Threatened
Autumn brings the rain. The air cools. The forest floor becomes a sponge of moss and leaf litter. It is in this wet, grey season that the Forest Crust appears. It does not shout. It does not demand attention. The fruiting bodies are small, spherical, and black, resembling tiny berries clustered on dead wood. They are hard and woody to the touch. As they age, the surface may crack, revealing the dark interior. It is a modest fungus, easily overlooked among the debris. Do not let its modesty fool you. It is essential.
The Forest Crust is found throughout New Zealand, from the northern forests to the southern beech lands. It fruits year-round, though it is most visible in autumn and winter when the wood is damp. It is not picky about its host, thriving on a variety of broadleaf trees and shrubs. Its presence is a sign of decay in progress. Where it grows, lignin is being broken down. Nutrients are being released. The cycle continues.
This fungus is saprotrophic. It does not form mycorrhizal relationships with trees. Instead, it feeds on decaying organic matter, breaking down dead wood. In doing so, it releases nutrients back into the soil. It is a recycler, working in the shadows of the forest. Without it, the debris would pile up. The forest floor would stagnate. The Forest Crust is efficient. It consumes what is dead to feed what is living. Its hardness is a defence, ensuring that few creatures compete for this resource.
The surface of the "berries" is rough, covered in tiny pores that release spores into the air. These spores are carried by the wind to new hosts, starting the cycle anew. The interior is white and dense, turning black as it matures. It smells faintly of earth, nothing more. Unlike the Garlic Parachute, it has no distinct scent. Its defence is structure, not chemistry.
Threats are minimal. The species is widespread and common. However, it is sensitive to changes in moisture and soil structure. Logging, fire, or heavy grazing can disrupt the delicate mycelial networks beneath the forest floor. Recovery is slow. The fungi wait for the conditions to return. They do not rush. It carries on.