https://en.wikipedia.org/wiki/Daedalea_quercina It is found in Europe, Asia, Northern Africa and Australasia. The sessile, fan-shaped fruiting bodies are typically 3–20 cm in diameter and up to 8 cm thick. They are found singly or in tiered groups, usually on rotting oak. The upper surface of the cap may be various shades of brown and is sometimes zonate. The pore surface, white to tan in color, is initially porous, but as the fruit body matures, some of the pore walls break down, forming slits with blunt partitions. This results in the characteristic maze-like (daedaloid or labyrinthinine/labyrinthiform) appearance. The tube walls are 10–30 mm long, with thick walls.
Vaisiakūniai šoninių kepurėlių pavidalo, kamštiški, paviršius nelygus, šiurkštus, kai kurių neryškiai rievėtas, gelsvas, šviesiai rudas, pilkai rudas, kartais apauga dumbliais ir pasidaro žalsvas, ypač daugiamečių vaisiakūnių. Vamzdeliai labirintiški, sudaro savotiškus rezginius. Daugiametis. Auga ant negyvų, kartais ant gyvų lapuočių medžių, ypač ant ąžuolų kelmų, pasitaiko ant riešutmedžio.
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