Puccinia smyrnii is a rust fungus that causes galls on Alexanders (Smyrnium olusatrum). Both surfaces of the leaves, and the stem may be thickened and blistered by spermogonia and aecia, followed by dark brown telia on the leaf underside.  There is no host alternation, and no uredinia are produced.

host

Photograph the rust on the host.  Ensure you have noted the host-plant species in your comments

on Alexanders - roadsides, gardens,  waste ground,etc.

Spring and summer.

Most records come from the coasts of England and Wales, but as the host plant moves inland, sometimes along salted roads, the rust fungus may be expected to occur more widely as well.

Infrequent or under recorded in Leicestershire and Rutland. The Burbage Wood record of 25th March 2016 is believed to be the first confirmed record for VC55.  However the host plant, Alexanders is spreading in our area and Puccinia smyrnii may well turn up more frequently.