Piptoporus betulinus (Bull.) P. Karst. Polyporaceae, Aphyllophorales. (Birch Polypora or Трутовик берёзовый однолетний).

Cap: 8-16cm convex up to almost flat, slightly or much asymmetrical up to kidney shaped, sometimes with a knob close to a wood; white (when soft) up to yellowish-brown with indistinct concentric coloring, smooth or somewhat velvety as shagreen leather; dull gray, loose and partially rotten when old (next year). Flesh 2-4cm thick.
Tubes 4-15mm long, several per 1mm, bottom cap surface looks fine velvety, almost white or some yellowish-white then light brown;
Stalk: rudimentary at the down part of a cap edge. It looks as a stub like fixation detail.
Habitat: single or small group at the old partially rotten birch stumps or trunks. It grows usually nearby overwinter partially decayed loose mushroom.
Edibility: stiff as a wood.
Season: June-October (annual, died over winter).


Piptoporus betulinus_706.jpg
Piptoporus betulinus_706_bottom_.jpg

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