Nevermind the Bluebells

Nevermind the bluebells, here's a lovely rust fungus growing on Dog's Mercury Mercurialis perennis at Ebernoe Common the other week.

Ellis & Ellis's 'Microfungi on Land Plants' led me towards Melampsora populnea. Looking into things a little further, I see M. populnea is considered to be a species complex and, according to the Fungi & Lichens of Great Britain and Ireland website, the species which occurs on Mercuralis is M. rostrupii. 

For the record
Date: 20/04/2019
Location: Ebernoe Common, Brick Kiln
Grid reference: SU979274