Oak shield mug
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Oak shield cupling ( Colpoma quercinum ) |
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| Systematics | ||||||||||||
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| Scientific name | ||||||||||||
| Colpoma quercinum | ||||||||||||
| ( Pers. ) Wallr. |
The oak shield cup ( Colpoma quercinum ) is a hose fungus from the order of the wrinkled scab-like (Rhytismatales).
features
Macroscopic features
The fruiting bodies are elongated to lip-shaped apothecia from 3 to 10 mm in diameter. They first appear on the branches as wood-colored ribs, which then break through the bark when ripe and release the gray, sometimes yellowish, spore-forming layer, the hymenium . This is surrounded by a thin black excipulum (outer cell layer) that is sunk into the wood.
Microscopic features
The asci are cylindrical-club-shaped and measure 130 to 190 × 9 to 11.5 μm. The ascospores are hyaline , thread-like with a slightly thickened upper end, smooth and measure 55–75 × 1.5–2 μm. The often strongly curved paraphyses are thread- shaped . Sometimes, before publication of the perfect state , the side fruit shape formed. This forms cylindrical to elliptical conidia that are 5 to 7 × 1.5 μm in size.
ecology
The oak shield cupling occurs on thin dying or dead branches of various oaks that are often still sitting on the tree , especially sessile oak ( Quercus petraea ), English oak ( Quercus robur ), downy oak ( Quercus pubescens ) and Mongolian oak ( Quercus mongolica ) Ripe March to May. The apothecia close in dry weather. Even if Colpoma quercinum is a weak parasite, it does not harm the host, as it only attacks lower branches that are already dying due to a lack of light or nutrients. It therefore serves to clean branches naturally and is to be assigned to normal tree development. It also lives as an endophyte in the living bark.
distribution
The oak shield cup occurs from the British Isles across Central Europe to Sweden and Russia to the Caucasus ( Georgia , Azerbaijan ). A find is also known from Chile in the Región de los Lagos . It is very common in Central Europe, even if it is often overlooked. Finds from North America have been assigned to the species, but further research is needed to determine whether these are really identical to Colpoma quercina .
literature
- Ewald Gerhardt: Mushrooms . BLV Buchverlag, Munich 2006, ISBN 978-3-8354-0053-5 , p. 553.
Web links
- Photos of the Eichenschildbecherling in MycoKey: the species Colpoma quercinum