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.
- Willem N. Ellis: (2021) Plant Parasites of Europe©