Bondarzewiaceae
3 genera
4 species
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Bondarzewia occidentalisBondarzew's polypore, giant mountain polypore
Distribution: Western North America, on conifer roots.
Habitat: Terrestrial in coniferous forests, arising from conifer roots, sometimes at the base of stumps or trees.
Substrate: Terrestrial but on wood.
Heterobasidion irregulareannosus root rot
Description: Sessile, reflexed, or effuse. Cap may be elongated horizontally, or imbricate. Cap surface dark brown, sulcate, irregular, margin thin and sharp. Pores round to angular, pore surface cream, glancing.
Distribution: Widespread in North American coniferous forests, wherever hosts are found: Pinus, Juniperus, Calocedrus.
Habitat: Coniferous forests, wherever hosts are present: Pinus, Juniperus, Calocedrus. Generally inside stumps, at the base of snags or on the undersides of logs.
Substrate: Coniferous wood, rarely hardwoods.
Heterobasidion occidentale
Description: Sessile, reflexed, or effuse. Cap may be elongated horizontally, or imbricate. Cap surface dark brown, sulcate, irregular, margin thin and sharp. Pores round to angular, pore surface cream, glancing.
Distribution: Widespread in western North America from Alaska to southern Mexico.
Habitat: Coniferous forests, wherever hosts are present: Abies, Sequoiadendron, Tsuga, Pseudotsuga, and Picea. Generally inside stumps, at the base of snags or on the undersides of logs.
Substrate: Coniferous wood.
Origin: Widespread in coniferous forests.