Flour cups
Flour cups | ||||||||||||
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Yellow ocher flour cup ( Cenangium ferruginosum ) |
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Systematics | ||||||||||||
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Scientific name | ||||||||||||
Cenangium | ||||||||||||
Fr. |
The flour cups ( Cenangium ) form a genus of the Helotiales .
features
The flour cups are generally small, blackish mushrooms that break out on branches under the bark. Characteristic for the genus is the leathery nature of the apothecium and the grainy, floury structure of the outside, which is not hairy. It consists of round, brown-walled cells, some of which are detached and thus give the impression of being grainy. The fruit bodies are initially closed, later opened with a rounded or compressed lip-shaped mouth, cup-shaped, rimmed. The fruit layer is thick, waxy, differently colored and forms four- or eight-pore asci with paraphyses in between. The elliptical spores are one or two-celled. In the secondary fruit form, smaller single- or multi-chambered pycnidia with so-called stylospores are formed , usually with a pore open at the tip . These are linear, pointed on both sides, often multicellular; or sausage-shaped or straight.
ecology
The flour cups mostly live saprophytically on dead wood of coniferous and deciduous trees and play a role in the decomposition of dead wood and thus cause a return of nutrients and minerals into the soil. Nevertheless, some species can, under certain circumstances, trigger a decline in shoots in severely weakened trees, such as the ocher-yellow flour cup or Cenangium atropurpureum .
Systematics
Around 20 species are known in Central Europe. The genus Encoelia is related , which usually produces larger fruiting bodies . Most of the species are rare. For Austria, for example, only the ocher-yellow flour cup and the pine flour cup are known, with only one location being given for the latter in Upper Austria. Some of the species described are also assigned to Encoelia , Hysterium , Tympanis or Clithris .
supporting documents
- Ewald Gerhardt: Mushrooms . BLV Buchverlag, Munich 2006, ISBN 978-3-8354-0053-5
- TFL Nees von Esenbeck , CG Nees von Esenbeck , ACF Henry, T. Bail : The system of mushrooms . Henry and Cohen Verlag, Ghent 1837. Digitized by Google in 2007.
Individual evidence
- ↑ The system of mushrooms: Cenangium
- ↑ Cornell University: Plant disease diagnostic clinic: Cenangium canker (PDF; 218 kB)
- ^ Database of mushrooms in Austria
- ^ Database of mushrooms in Austria
- ^ Index Fungorum. Retrieved February 23, 2010.