Name: Ceriporia spissa (Schwein. ex Fr.) Rajchenb.
Most Confident Observations:
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Version: 4
Previous Version 

First person to use this name on MO: Eddee
Editors: Danny Newman, walt sturgeon, Chaelthomas

Notes on Taxonomy: [Edit]

Habitat/range: On hardwoods, occasionally on conifers, causing a white rot. In BC, known from one collection on a rotting Arbutus log in Victoria (Ob- servatory Hill). Elsewhere in western North America, known from ID, WA, OR, CA, and AZ.Basidiomata effuse, annual, large, typically adnate, only 1–2 mm thick, fertile areas in patches surrounded by sterile, pinkish buff mycelium; margin typically sterile; context pinkish buff, soft, thin; pore surface bright orange, becoming reddish brown when dried; pores round to angular, 7–9 per mil- limetre.
Hyphae 2.0–3.5 μm diameter with simple septa, frequently branched, branch- es diverge at a right angle, tramal hyphae parallel, densely packed, aggluti- nated, walls slightly thickened; basidiospores allantoid, 4–6 × 1.5–2.0 μm.
Notes: Ceriporia spissa is distinguished by its effuse, bright orange basidi- omata and relatively small, allantoid basidiospores, 4–6 × 1.5–2.0 μm. Thin sections of the tube layer in koh often produce a white exudate. Microscopi- cally, some hyphal segments are encrusted with an amorphous, pale yellow substance.

Polypores of British Columbia (Fungi: Basidiomycota)

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