Trichaptum biformis Polyporaceae, Aphyllophorales. (Violet Toothed Polypora or Трихаптум двоякий, Т. пергаментный).

Cap: 2-8cm wide, gentle convex up to almost flat, asymmetrical and semicircular up to some marine shell shaped, margin curved inter or down, semi-concentric zoned, sometimes wavy as overlapped layers; white (when soft) up to light gray with thin semi-concentric purple-brown and gray circles, adult one has some irregular lilac or dull pink and sometimes green coloring (may be algae covering); somewhat radial hairy or velvety; when old next year it is partially rotten and turned to dark gray or green.
Flesh 1-3mm thick, white up to dull yellowish-brown with indistinct layers along cap.
Tubes 2-4mm long, several per 1mm and becoming soon hairy or stubby (tiny flattened needles and crimped leafs); bottom cap surface brownish-purple or violet-brown;
Stalk: practically absent or rudimentary as a lateral fixation detail.
Habitat: small group or crowded (overlapped) clusters at the old partially rotten birch stumps or trunks minor at living deciduous wood. It grows usually nearby overwinter partially decayed and black and green mushrooms.
Edibility: stiff as a wood.
Season: June-October or annual, died (?) over winter.
Dried specimen # 746 is in Karaganda town, Kazakhstan

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