''Fibroporia vaillantii'', also known as mine fungus, white pore fungus, ''Antrodia vaillantii'', ''Polyporus vaillantii'', and various other namesFibroporia vaillantii
on Mycobank. is a wood-decaying fungus which can occur on

timber Lumber is wood that has been processed into dimensional lumber, including beams and planks or boards, a stage in the process of wood production. Lumber is mainly used for construction framing, as well as finishing (floors, wall panels, wi ...

in humid conditions. The fungus causes brown rot of pine wood, in which

cellulose Cellulose is an organic compound with the formula , a polysaccharide consisting of a linear chain of several hundred to many thousands of β(1→4) linked D-glucose units. Cellulose is an important structural component of the primary cell wall ...

and

hemicellulose A hemicellulose (also known as polyose) is one of a number of heteropolymer, heteropolymers (matrix polysaccharides), such as arabinoxylans, present along with cellulose in almost all embryophyte, terrestrial plant cell walls.Scheller HV, Ulvskov H ...

are broken down, leading to brown discoloration and shrinkage of wood.

Description

The fungus grows on wood from

coniferous trees Conifers are a group of cone-bearing seed plants, a subset of gymnosperms. Scientifically, they make up the division Pinophyta (), also known as Coniferophyta () or Coniferae. The division contains a single extant class, Pinopsida. All extant ...

, such as

pine wood A pine is any conifer tree or shrub in the genus ''Pinus'' () of the family Pinaceae. ''Pinus'' is the sole genus in the subfamily Pinoideae. The World Flora Online created by the Royal Botanic Gardens, Kew and Missouri Botanical Garden accepts ...

, under damp conditions, with a wood moisture content of 40 to 50 percent. In humid atmospheres, the white cotton-like

mycelium Mycelium (plural mycelia) is a root-like structure of a fungus consisting of a mass of branching, thread-like hyphae. Fungal colonies composed of mycelium are found in and on soil and many other substrate (biology), substrates. A typical single ...

can grow on wood surfaces and cross inert materials. In newly grown mycelium, fine drops of clear liquid may be present. The optimal temperature for growth is ;The temperature as growth factors for the dry rot
Ingenieursbüro Peter Rauch, 2005. it will grow at temperatures between .
Rentokil UK.
on huiszwam.be (in Dutch) The fruit body is an irregular white plate with a thickness of 2 to 12 mm.

References

{{Taxonbar, from=Q2720064 Fungi described in 1815 Fungi of Europe Fomitopsidaceae