Taphrina fusca Giesenhagen, 1899
on Dryopteris
gall
up to 5 mm large, yellowish galls on the leaves, entirely consisting of epidermal tissue. Upperside with a layer of asci of 4-8 x 19-17 µm, standing on stalk cells of almost the same size.
host plants
Dryopteridaceae, monophagous
Dryopteris carthusiana, dilatata, “rigida var. australis”, villarii.
synonyms
Exoascus fuscus (Giesenhagen) Saccardo & Sydow, 1902.
references
Bataille (1936a), Brandenburger (1985a: 6), Buhr (1964b), Redfern & Shirley (2011a), Mix (1949a).