Phylum: Basidiomycota Family: Pucciniaceae
Puccinia hordei G.H. Otth
Barley Leaf Rust
The main host is cultivated barley (Hordeum vulgar), but some grasses are also hosts
References:
Wilson, M. & Henderson, D.M. (2011 reprint) British Rust Fungi
Termorshuizen, A.J. & Swertz, C.A. (2011) Dutch Rust Fungi