Physoderma deformans Rostrup 1886
on Anemone, Helleborus
Anemone nemorosa, Peize, 2.v.2021 © Ben van As
18.v.2021. Here the infection is evident in the enlarged, malformed and exceptionally late flower; the leaf is somewhat disfigured.
gall
weak fusiform, somewhat translucent swellings of the stem and petioles. In Anemone the flowers become exceptionally large.
host plants
Ranunculaceae, oligophagous
Anemone nemorosa, trifolia; Helleborus viridis.
references
Buhr (1964b), Klenke & Scholler (2015a), Tomasi (2014a).