Mark Powell
obfuscans3
Four species of Punctelia occur in Britain. Until very recent years, only two of these (P. subrudecta and P. jeckeri) were regularly found in central England.P. subrudecta and P. jeckeri:
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I went and had a look for yellow lichens on ordinary trees in my parish today. What did I find? Thread.https://twitter.com/obfuscans3/status/1348728335292129281 25 year old apple orchard. Twigs and branches conspicuously
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Here are nice images of typical Physcia adscendens and P. tenella (borrowed from https://www.afl-lichenologie.fr/  ). How well do I really know this pair of lichens. The start of a thread!
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I was recently asked to look at a churchyard to assess its importance for lichens. The most notable lichen present is perhaps the Nationally Rare Rinodina calcarea, present in abundance
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