the giant bracket of NZ's pukatea riverbanks

Size
Width: 20–50 cm
Lifespan
1 years
Diet
Parasitic: feeds on living pukatea (Laurelia novae-zelandiae) trees. Causes wood decay forming large bracket fruiting bodies on the trunk. Habitat requirements poorly understood.
Habitat
On living pukatea (Laurelia novae-zelandiae) trees. Causes wood decay. Forms large bracket fruiting bodies on the trunk in swamp forest.
Range
Known only from the Waikato region. Extremely rare. Found on pukatea trees in lowland swamp forest remnants.
Endemism
Endemic
Main Threats
Habitat loss and forest fragmentation are the primary threats. Extremely limited distribution. Dependent on mature pukatea trees which are also threatened.
Population
Populations are critically low. The species is listed as Threatened Nationally Critical. Known only from the Waikato. Habitat protection is critical for survival.
Conservation Status
Nationally Critical
It is known only from the Waikato region. This large bracket fungus grows on living pukatea trees. It has a single host and a single home. The fruiting body spans twenty to fifty centimetres across. It is large and woody. The top is brown. The pore surface underneath is white. It looks like a shelf attached to the side of the tree. A fungus that resembles furniture. The visual impact is substantial. The presence is undeniable. The fungus acts as a parasite. It enters the tree through wounds in the bark. Then it slowly rots the heartwood from the inside out. It can take decades to kill a mature pukatea. But eventually, the tree will weaken. It will fall. The fungus will then continue to feed on the dead wood. It persists for years. It is a slow killer. It is a patient decomposer. The timeline is long. The outcome is certain. This species has not yet been formally named. It is known only as Ganoderma sp. 'Awaroa'. The name comes from the location where it was first discovered. It is one of New Zealand's most endangered fungi. Only a handful of known individuals exist. It is a fungus that does not even have a proper name. The anonymity adds to its fragility. The lack of classification reflects its rarity. The pukatea tree itself is a species of lowland swamp forest. These forests are now rare due to land clearance. The fungus depends on mature pukatea trees. These trees are themselves threatened. The survival of the fungus is tied to the survival of its host. Two rare things depend on each other. The connection is vital. The vulnerability is shared. To find this fungus, a person would need to visit a remnant of lowland swamp forest in the Waikato. They must find a mature pukatea tree. Then they must look up. The large bracket is hard to miss. But the trees are few. The search is difficult. The reward is rare. It is a conservation priority. It is a species on the edge. It serves as a reminder. When the forests are lost, the fungi are lost too. The swamp forest is shrinking. The pukatea trees are fewer. The bracket fungus holds on. It waits for a host that is running out. It can wait. It has been waiting for decades. It can wait a little longer.