Entyloma polysporum (Peck) Farlow, 1883

on Ambrosia

gall

Sori as roundish leaf spots, initially light yellowish brown, finally dark green or necrotic. Inside hyaline, rotund, smooth spores, 10-15 µm.

hostplants

Asteraceae, monophagous

Ambrosia artemisiifolia.

references

Vánky (1994a).