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Thursday, 23 July 2015


Cercospora depazeoides

Looking at a patch of Blackthorn for Polystigma rubrum (it's a Lost & Found species), I came across an Elder growing amongst them. Although the patches on the leaves were clearly not what I was looking for, there was obviously some kind of fungi growing. My first thoughts were that it was a kind of rust - so pictures went off to our resident rust expert Nigel. 
Most impressively he knew exactly what I had found - not a rust but a species of microfungi. Looking at the records this little ascomycete seems to be found exclusively on Sambucus nigra, Elder. The apothecia (little black "dots" in the photo) were clearly visible with a hand lens.

Another species to add to the list!

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