Alnus glutinosa, Dronten, Roggebotbos © Hans Jonkman

unusually coloured gall

Alnus glutinosa, Klarenbeek, Ge © Arnold Grosscurt: a heavily infested seedling next to a healthy one.

infested leaves

Alnus glutinosa, Belgium, prov. Antwerp, Balen, Griesbroek © Carina Van Steenwinkel

underside

asci

host plants

Betulaceae, (narrowly?) monophagous

Alnus glutinosa, incana, x pubescens.

synonyms

Taphrina media Palm, 1918.

references

Abras, Fassotte, Chandelier & Cavelier (2008a), Bacigálová, Lopandic, Rodrigues ao (2003a), Bellmann (2012a), Brandenburger (1985a: 50), Buhr (1964b), Coulianos & Holmåsen (1991a), Dauphin & Aniotsbehere (1997a), Dietrich (2013a), Doppelbaur (1973a), Groom (2011a), Klenke & Scholler (2015a), Koops (2013a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Mix (1949a), Redfern & Shirley (2011a), Roques, Cleary, Matsiakh & Eschem (2017a), Roskam (2009a), Sadebeck (1890a), Tomasi (2014a).