Bowl-shaped flour disc
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Bowl-shaped flour disc ( Aleurodiscus disciformis ) |
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| Aleurodiscus disciformis | ||||||||||||
| ( De Candolle : Fries ) Patouillard |
The bowl-shaped flour disc ( Aleurodiscus disciformis ) is a mushroom species from the family of layer mushroom relatives (Stereaceae). It forms annual resupinate- spreading fruiting bodies that grow on the trunks of dying and dead oaks ( Quercus spp.). The species is distributed holarctic and occurs in the meridional to temperate zone . The fructification takes place from the end of March to the beginning of autumn, when sufficient rain falls.
features
Macroscopic features
The bowl-shaped flour disc has hard, flat bowl-shaped to effuso-reflexes (protruding from the substrate at the edge) basidiocarpies . The smooth hymenium is white to cream in color.
Microscopic features
As with all flour discs , the hyphae structure of the bowl-shaped flour disc is monomitic , i.e. it only consists of generative hyphae. The hyaline basidia are four-pored, rarely two-pored. The spores that sit on them are broadly ellipsoidal, 15–20 × 10–16 µm in size and appear warty in Melzer's reagent . The hyphae have buckles as well as cylindrical, thin-walled spiked -roller-shaped hyphae ends in the hymenium , so-called acantho hyphidia .
distribution
The species area of the bowl-shaped flour disc includes the Holarctic from North Africa via Europe and Siberia to Mexico. It is found in both meridional and temperate climates .
ecology
The bowl-shaped flour disc is a saprobiont that colonizes the trunk wood and bark of dying and dead deciduous trees. Mostly oaks ( Quercus spp.) Are the hosts. It can always be found on the sheltered side of trunks standing or lying on the ground. The fruiting bodies appear in Central Europe from late March to early autumn. Basidia and spores are only present from mid-April.
swell
- German Josef Krieglsteiner (Ed.): The large mushrooms of Baden-Württemberg . Volume 1: General Part. Stand mushrooms: jelly, bark, prick and pore mushrooms. Ulmer, Stuttgart 2000, ISBN 3-8001-3528-0 .
