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Another Lichen

A rather lettuce-like lichen which I think might be a greenish form of Xanthoria parietina.

I took the following specimen:

This yielded the following spores (magnification x600, field width 86um):

These are about 12.5 x 7um which agrees well with the range 12-16 x 5-9um given for Xanthoria parietina at  the Consortium of North American Lichen Herbaria.

First photo and specimen taken in Whiteknights Park, Reading, UK, on 2014-01-11.

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