- Department: Basidiomycota (Basidiomycetes)
- Subdivision: Agaricomycotina (Agaricomycetes)
- Class: Agaricomycetes (Agaricomycetes)
- Subclass: Incertae sedis (undefined)
- Order: Polyporales
- Family: Polyporaceae (Polyporous)
- Genus: Cerrena (Cerrena)
- Type: Cerrena unicolor
Description: Fruit body 5-8 (10) cm wide, semicircular, sessile, laterally accreted, sometimes narrowed at the base, thin, felt on top, concentrically furrowed, with weak zones, first grayish, then gray-brownish, gray-ocher, in the bases are sometimes dark, almost black or green with moss, with a lighter, sometimes whitish, wavy edge.
At first, the tubular layer is medium-porous, then dissected, with elongated, characteristically sinuous pores, inclined towards the base, grayish, gray-cream, gray-brownish.
The pulp is leathery at first, then hard, corky, separated from the upper felt layer by a thin black stripe, whitish or yellowish, with a pungent spicy odor.
The spore powder is whitish.
Distribution: from early June to late autumn on dead wood, deciduous stumps (birch, alder), along roads, in clearings, often. Dry bodies of last year are found in the spring.
Similarity: Can be confused with Coriolus, which differs in the type of hymenophore.
Photo of the Cerrenus mushroom one-color of the questions in recognition:
2018.03.08 Alexander 2017.12.12 Marina