Volkartia rhaetica (Volkart) Maire, 1907

on Crepis

gall

extensive, flat, initially dark green, finally more yellowish brown blister-like swelling of the leaf. When the fungus is mature the surface is covered by a greyish-white bloom of asci.

host plants

Asteraceae, monophagous

Crepis conyzifolia, mollis, pygmaea, pyrenaica.

synonyms

Taphrina rhaetica Volkart, 1903.

references

Bataille (1936a), Buhr (1964b), Klenke & Scholler (2015a), Reddy & Kramer (1975a).