Postia ptychogaster - Mushroom most often spherical or semi-circular, 30-100 mm, white or brownish, soft to the touch, hairy-spiky, easily crumbling or breaking except for the hard part near the base. Sometimes with gutting drops. No stem. It is an imperfect form that produces chlamydospores.
Tubules form rarely, usually at the base of the fruiting body, are short (up to 5 mm long), delicate (inter-tubular septum quickly disintegrate), with white, soft and serrated blades.
The pores are 0.2 - 1 mm in diameter, round or angular, irregular.
The flesh on the vertical section is yellowish brown, partly fibrous, partly powdery, more or less concentrically striped and composed of bundles of hyphae, radiating from one point and surrounding cavities, containing chlamydospores. Initially juicy, later dry. No special smell ..
Occurrence: Rare, on stumps and coniferous roots.