Maple scab

Maple scab
	Maple scab
Systematics
Subdivision :	Real ascent mushrooms (Pezizomycotina)
Class :	Leotiomycetes
Order :	Wrinkled scabs (Rhytismatales)
Family :	Wrinkled scab relatives (Rhytismataceae)
Genre :	Scab fungi ( Rhytisma )
Type :	Maple scab
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.

Web links

RBOFUX - diagnostic database for trees

Commons : Ahorn-Wrinkle Scab - Album with pictures, videos and audio files

[Gerhardt-1] Ewald Gerhardt: Mushrooms . BLV Buchverlag, Munich 2006, ISBN 978-3-8354-0053-5 , page 552.