Fungi: Basidiomycota - rust fungus Puccinia jaceae Photographs on Centaurea nigra, Knapweed Hosts: Uredinia and telia on Centaurea, Cheirolophus, Cyanus, Rhaponticum spp. Considered identical with, or a variety of, Puccinia hieracii Hosts: Hieracium, Pilosella

Puccinia jaceae
Kingston Lacy, Dorset. September 2017