Greater fleas have little fleas
Upon their backs to bite ‘em – so says the poem.
A similar regress of parasitism can happen in the realm of the fungi.
Honey fungus are common parasites on trees, or in this case some of the bushes in West Park. An infection is likely to be fatal for the host. These honey fungus have then been the target of a second infection by some other form of fungus or mould.