Protomyces pachydermus von Thümen, 1874
on Taraxacum
Taraxacum officinale, Belgium, prov. Antwerp, Mol, 25.iv.2020 © Carina Van Steenwinkel: infected leaf
same leaf, underside, showing the locally swollen midrib
spores (“ascogenous cells”) in the tissue of the midrib
stronger magnification
The size was 26-50 µm.
Taraxacum officinale © Roelof Jan Koops
gall
Diffuse, spindle-shaped swellings of the midrib, sometimes also the pedicel. The gall is somewhat vitreous, shiny, yellowish green at first, later often purplish. Fungus spores are formed in and around the vascular tissue.
host plants
Asteraceae, monophagous
Taraxacum officinale.
synonyms
see also Protomyces picridis
references
Bacigálová (2004a), Bacigálová, Mułenko & Wołczańska (2005a, 2008a), Blumer (1946a), Brandenburger (1985a: 663), Buhr (1965a), Dauphin & Aniotsbehere (1997a), Ellis & Ellis (1997a), Jage, Scholler & Klenke (2010a), Klenke & Scholler (2015a), Koops (2013a), Kruse (2019a), Reddy & Kramer (1975a), Redfern & Shirley (2011a), Roskam (2009a)