Puccinia chaerophylli

Puccinia chaerophylli is a gall-causing rust fungus that affects the leaves and stems of umbellifers such as Cow Parsley and Sweet Cicely.  Leaves, stems, petioles  and shoots are swollen and distorted by yellow aecia and spermogonia; rust-coloured uredinia and brown telia also occur, usually on the leaf undersides or stems

Where the host species occur.

When the host species are in leaf.

Not very well recorded, but seems to be more common in the northern half of Britain.

Status in Leicestershire and Rutland not known.