Irpex Lacteus (Fr.) Fr Syn: Polyporus Tulipifera (Schwein.)Murrill Profile Group: Basidiomycota, Polyporales, Meruliaceae

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Irpex Lacteus (Fr.) Fr Syn: Polyporus Tulipifera (Schwein.)Murrill Profile Group: Basidiomycota, Polyporales, Meruliaceae Irpex lacteus (Fr.) Fr Syn: Polyporus tulipifera (Schwein.)Murrill Profile Group: Basidiomycota, Polyporales, Meruliaceae shape Effused-reflexed or resupinate at first; pilei usually imbricate; dimidiate or laterally fused size Up to 1 x 7 x 0.5 cm texture Densely tomentose to hirsute; smooth or shallowly sulcate in age pileus White to cream colored or pale buff stipe N/A characters context White to pale tan; soft-fibrous; up to 2 mm thick Macroscopic pore surface White to cream pores Angular; 2-3 per mm near margin; dissepiments split to form an irpiciform hymenophore tube layer(s) Concolorous and continuous with context; up to 3 mm thick hyphal system Dimitic; generative and skeletal hyphae clamp connections None sterile elements Cystidia abundant; thick-walled; heavily incrusted apically 50-110 x 5-10 um; projecting up to 40 um characters Microscopic Microscopic basidiospores Oblong to cylindric; straight to slightly curved; hyaline; smooth; 5-7 x 2-3 um substrate/host Dead wood of numerous hardwood genera; common on tulip poplar in the southeast U.S. seasonality Annual type of decay White rot of dead hardwoods, rarely of conifers Habitat characters range Common throughout the forest regions of Canada and the U.S. except for the Southwest. Cosmopolitan species. Notes Strongly hydnaceous hymenophore, conspicuously incrusted cystidia, and simple-septate hyphae are diagnostic . References Overholts, 1953; Gilbertson & Ryvarden, 1986. Irpex lacteus profile, page 1 of 3 Last update: 16 May, 2011 by B.R. Cody Mycological Herbarium NCSU Last review: 16 May, 2011 by L.F. Grand Species distribution in North Carolina Irpex lacteus (Fr.) Fr Habit of Basidiocarps Habit of Basidiocarps Basidiospores – 1000 X Basidiospores – 1000 X Irpex lacteus profile, page 2 of 3 Last update: 16 May, 2011 by B.R. Cody Mycological Herbarium NCSU Last review: 16 May, 2011 by L.F. Grand Encrusted Cystidia – 400 X Encrusted Cystidia – 400 X Skeletal Hyphae – 400 X Skeletal Hyphae – 400 X Irpex lacteus profile, page 3 of 3 Last update: 16 May, 2011 by B.R. Cody Mycological Herbarium NCSU Last review: 16 May, 2011 by L.F. Grand .
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