Maple scab
Maple scab | ||||||||||||
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![]() Maple scab |
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Systematics | ||||||||||||
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Scientific name | ||||||||||||
Rhytisma acerinum | ||||||||||||
( Pers. ) Fr. |
The maple scab ( Rhytisma acerinum ) is a type of mushroom from the group of ashlar mushrooms. This species causes the tar spot disease in maple species .
features
The fruit body is about 10 to 20 millimeters wide, its surface is wrinkled. It consists of round, black stromata . These develop within maple leaves and bulge them up. In spring, gray to pale ocher-colored, elongated convoluted fruit disks ( apothecia ) appear in places where the surface of the leaves tears. The spores measure 50 to 75 × 1.8 to 2 micrometers. They are hyaline, long thread-like, smooth and their content is granular. The asci are cylindrical-club-shaped. The paraphyses are filamentous. They are often curved or forked at their tip.
Occurrence
The species grows on the leaves of maple species, especially Norway maple ( Acer platanoides ). The conidia shape can often be seen in late autumn , the main fruit shape occurs in spring and is less common.
Individual evidence
- ↑ a b c Ewald Gerhardt: Mushrooms . BLV Buchverlag, Munich 2006, ISBN 978-3-8354-0053-5 , page 552.