What is "polypore"

n. Any of a group of tough, leathery poroid mushrooms similar to boletes but typically lacking a distinct stalk.

n. woody pore fungi; any fungus of the family Polyporaceae or family Boletaceae having the spore-bearing surface within tubes or pores; the fruiting bodies are usually woody at maturity and persistent [syn: pore fungus, pore mushroom]

Polypores are a group of fungi that form fruiting bodies with pores or tubes on the underside (see Delimitation for exceptions). They are a morphological group of basidiomycetes like gilled mushrooms and hydnoid fungi, and not all polypores are closely related to each other. Polypores are also called bracket fungi, and their woody fruiting bodies are called conks.

Most polypores inhabit tree trunks or branches consuming the wood, but some soil-inhabiting species form mycorrhiza with trees. Polypores and their relatives corticioid fungi are the most important agents of wood decay. Thus, they play a very significant role in nutrient cycling and carbon dioxide production of forest ecosystems.

Over one thousand polypore species have been described to science, but a large part of the diversity is still unknown even in relatively well-studied temperate areas. Polypores are much more diverse in old natural forests with abundant dead wood than in younger managed forests or plantations. Consequently, a number of species have declined drastically and are under threat of extinction due to logging and deforestation.

Polypores are used in traditional medicine, and they are actively studied for their medicinal value and various industrial applications. Several polypore species are serious pathogens of plantation trees and are major causes of timber spoilage.

[[Image:Daedaleopsis confragrosa Eglinton.JPG|thumb|

The blushing bracket showing the red bruising which is one identification characteristic.]]

Bracket fungi, or shelf fungi, are among the many groups of fungi that comprise the phylum Basidiomycota. Characteristically, they produce shelf- or bracket-shaped or occasionally circular fruiting bodies called conks that lie in a close planar grouping of separate or interconnected horizontal rows. Brackets can range from only a single row of a few caps, to dozens of rows of caps that can weigh several hundred pounds. They are mainly found on trees (living and dead) and coarse woody debris, and may resemble mushrooms. Some form annual fruiting bodies while others are perennial and grow larger year after year. Bracket fungi are typically tough and sturdy and produce their spores, called basidiospores, within the pores that typically make up the undersurface.

1. Kirk PM et al. (2008) Ainsworth and Bisby's dictionary of the fungi. 10th edition. CABI Europe.↩