Cristulariella depraedans (Cooke) Höhnel, 1916
on Acer
Acer platanoides, USA, Maine, Franklin County © Bruce Watt, University of Maine, Bugwood.org
Acer paseudoplatanus, Flevoland, Reve-Abbertbos © Hans Jonkman
detail (underside)
conidiophores; from Bowen (1930a)
Acer pseudoplatanus, Dronten, Roggebotse Bos © Hans Jonkman (also a few Rhytisma acerinum spots)
heavy infestation
gall
characteristic are the conidiophores, actually propagules, with their bright white, ± 0.1 large heads, mainly at the underside of the spots.
host plants
Sapindaceae, etc.
Acer platanoides, pseudoplatanus; Aruncus dioicus; Carpinus betulus; Cornus sanguinea; Corylus avellana; Fagus sylvatica; Lonicera xylosteum; Prunus avium; Quercus robur; Tilia cordata.
Acer is the most important host by far.
references
Abras, Fassotte, Chandelier & Cavelier (2008a), Bowen (1930a), Ellis & Ellis (1997a), Kowalski & Bartnik (2008a), Kruse (2019a), Ludwig (1974a), Narumi-Saito, Hosoya, Sano & Harada (2006a).