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).