Phaeolus Schweinitzii (Fr.) Pat Syn: Polyporus Schweinitzii Fr

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Phaeolus schweinitzii (Fr.) Pat Syn: Polyporus schweinitzii Fr. Profile Group: Basidiomycota, Polyporales shape Circular or irregularly lobed size Up to 25 cm in diameter texture Soft fibrous when young; corky to somewhat brittle with age pileus Solitary or imbricate; orange at first; yellowish-brown at maturity; faintly zonate; tomentose to hirstute stipe Central or lateral; short and stout; simple or branched; up to 5 cm diameter; tomentose to hirstute context Yellowish-brown; becoming dark rusty-brown with age; soft; characters Macroscopic azonate pore surface Orange at first; becoming greenish-brown then yellowish to rusty brown with age pores Angular; 1-2 per mm tube layer(s) Decurrent, distinct from context; greenish to rusty brown; up to 1.5 cm thick hyphal system Monomitic clamp connections N/A sterile elements Cystidia frequent; yellowish; cylindrical characters Microscopic basidiospores Ellipsoid to ovoid; hyaline; smooth; 6-9 um x 2.5-5 um substrate/host Grows from roots or occasionally effused-reflexed on base of living trees or stumps; living conifers; especially pines in southeastern United States seasonality Annual Habitat type of decay Brown cubical rot of heartwood of butt and roots of living characters conifers. range Throughout the conifer forest ecosystems of North America Notes Thin, whitish, resinous mycelial felts are present in shrinkage cracks. Major cause of butt rott in Douglas fir and other commercial timber species References Overholts, 1953; Gilbertson & Ryvarden, 1986. Grand & Vernia, 2000, 2002. Phaelous schweinitzii profile, page 1 of 3 Last update: 22 June, 2009 S.E. Thomas Mycological Herbarium NCSC Last review: 13 June, 2009 L.F. Grand Species distribution in North Carolina Phaeolus schweinitzii (Fr.) Pat Top view of basidiocarp View of pore surface (scale in cm) Cutaway view of context Phaelous schweinitzii profile, page 2 of 3 Last update: 22 June, 2009 S.E. Thomas Mycological Herbarium NCSC Last review: 13 June, 2009 L.F. Grand Spores at 1000x Spores at 400x Cystidoles 400x Vascular elements from hymenium at 200x Thick-walled contextual hyphae at 400x Phaelous schweinitzii profile, page 3 of 3 Last update: 22 June, 2009 S.E. Thomas Mycological Herbarium NCSC Last review: 13 June, 2009 L.F. Grand .

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