Synonyms: Boletus annosus, Boletus cryptarum, Boletus epiphegus, Cunninghamella meineckella, Fomes annosus, Fomes cryptarum, Fomitopsis annosa, Fomitopsis annosus, Friesia annosa, Heterobasidion cryptarum, Inodermus cryptarum, Oedocephalum meineckellus, Phellinus cryptarum, Physisporus makraulos, Placodes annosus, Polyporus annosus, Polyporus batschii, Polyporus cryptarum, Polyporus fuscus, Polyporus gillotii, Polyporus macraulos, Polyporus makraulos, Polyporus marginatoides, Polyporus nordmannii, Polyporus scoticus, Polyporus scutatus, Polyporus serpentarius, Polyporus subpileatus, Polystictoides fuscus, Polystictus cryptarum, Poria cryptarum, Poria macraula, Poria makraulos, Poria nordmannii, Poria scutata, Pycnoporus annosus, Scindalma annosum, Scindalma cryptarum, Spiniger meineckellus, Spongioides cryptarum, Trametes annosa, Trametes radiciperda, Trametes scutata, Ungulina annosa.
Common names: root rot, Conifer-base Polypore.
Extract from Wikipedia article: Heterobasidion annosum is a basidiomycete fungus in the family Bondarzewiaceae. It is considered to be the most economically important forest pathogen in the Northern Hemisphere. Heterobasidion annosum is widespread in forests in the United States and is responsible for the loss of one billion U.S. dollars annually. This fungus has been known by many different names. First described by Fries in 1821, it was known by the name Polyporus annosum. Later, it was found to be linked to conifer disease by Robert Hartig in 1874, and was renamed Fomes annosus by H. Karsten. Its current name of Heterobasidion annosum was given by Brefeld in 1888. Heterobasidion annosum causes one of the most destructive diseases of conifers. The disease caused by the fungus is named annosus root rot.
Belarusian: Губа яловая, Danish: Rodfordærver, Dutch: Dennenmoorder, Estonian: Juurepess, Finnish: Männynjuurikääpä, French: Polypore du pin, German: Gemeiner Wurzelschwamm, Japanese: マツノネクチタケ, Latvian: Sakņu piepe, Polish: Korzeniowiec sosnowy, Russian: Корневая губка, Swedish: Rotticka.
Heterobasidion annosum is a root-rotting fungus that infects coniferous trees, causing significant economic losses in forestry. In East and Central Texas, it has been found to commonly infect loblolly pine and shortleaf pine, with incidence increasing in stressed or injured trees. The fungus grows slowly, forming a fan-shaped or shelf-like fruiting body at the base of infected trees, and can spread through root contact between trees or by spores. It is widely distributed across the region, particularly in areas with dense pine stands and poor soil drainage.
Observations of the fungus Heterobasidion annosum in East and Central Texas reveal its presence on various substrates, including dry pines, pine logs, and fallen trees. The fungus was found in Big Creek Scenic Area of Sam Houston National Forest, near Shepherd, Texas, on multiple occasions between 2018 and 2021. It appears as a polypore mushroom with white pores and can envelop leaves and needles on infected logs. The fungus grows on the bark and lower surface of fallen trees, forming round patches or resupinate growths. Close-up observations reveal its texture and pore structure, providing insights into its morphology and growth habits in the region. The repeated sightings suggest that Heterobasidion annosum is a common and persistent species in this area, likely playing a role in decomposing organic matter and contributing to forest ecosystem dynamics.
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