Heterobasidion
3 species
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Heterobasidion irregulare – annosus 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.
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.
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.
