Taphrina sadebeckii Johanson, 1886
on Alnus
Alnus glutinosa, Naardermeer
Alnus glutinosa, Leiden
Alnus glutinosa, Nieuwendam; upper side of the leaf
underside
asci, strong magnification (lighted from below)
Alnus glutinosa, Belgium, prov. Antwerp, Tongerlo, Engelse Kamp © Carina Van Steenwinkel
detail; the mealy appearance of the galls indicates that the fungus is sporulating
ascus, filled with spores (congo red staining)
gall
the galled spots rarely exceed 1 cm. Never witches’ brooms.
host plants
Betulaceae, monophagous
Alnus ?cordata, glutinosa, glutinosa x incana, incana subsp. rugosa.
notes
the gall can be mistaken for the one caused by Acalitus brevitarsus.
references
Bacigálová, Lopandic, Rodrigues ao (2003a), Bacigálová, Mułenko& Wołczańska (2005a), Bataille (1936a), Buhr (1964b), Dauphin & Aniotsbehere (1997a), Dietrich (2016b), Jage, Kruse, Kummer ao (2013a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Redfern & Shirley (2011a), Roskam (2009a), Tomasi (2014a).