Puccinia coronata
Corda, 1837
barley crown rust
on Frangula, Rhamnus
GALL
spermogonia
SPERMOGONIA, AECIA
Rhamnaceae, oligophagous
Frangula azorica; Frangula alnus; Rhamnus alaternus, alpina, cathartica, crenulata, lycioides subsp. graeca, pumila, saxatilis. [Note: Host list drawn from European plants, but the rust, a commercially destructive one, is widespread in N. America too.]
[click below for photos]
”- Willem N. Ellis: (2021) Plant Parasites of Europe©