Entyloma fergussonii (Berkeley & Broome) Plowright, 1889
on Myosotis

Myosotis spec., Belgium, prov. Antwerp, Geel, Wilders © Carina Van Steenwinkel

infected leave, upper side

underside

earlier stage

spores, embedded in the host tissue

spores
gall
vage, round, whitish to brown, up to 3 mm large leaf spots. Embedded in the tissue smooth, yellowish brown spores.
host plants
Boraginaceae, monophagous
Myosotis alpestris, amoena, arvensis, discolor, laxa subsp. baltica + caespitosa, ramossisima, scorpioides, soleirolii, stricta, sylvatica.
notes
Tomasi (2014a) lists the fungus from Asarum europaeum. This certainly in incorrect. But the intriguing fact remains the the book by Vánky does not mention any smut fungus from Asarum, which excluded a simple identification error.
references
Ainsworth & Sampson (1950a), Almaraz (1998a), Gönczö & Révay (1981a), Brandenburger (1985a: 521), Klenke (2002a), Klenke & Scholler (2015a), Kruse, Thiel, Frauenberger ao (2019a), Kummer (2009a), Lutz & Vánky (2009a), Savchenko & Heluta (2012a), Scheuer & Bechter (2012a), Scholler, Reinhard & Schubert (1996a), Scholz & Scholz (2013a), Tomasi (2014a), Vanderweyen & Fraiture (2014a), Vánky (1994a, 2012a), Vánky & Abbasi (2013a).