Last Saturday we found the following lichen on a limestone rock near Kettlewell
Recorded it as Solenopsora candicans. However now I wonder if it was really Rhizocarpon umbilicatum?
Can anyone give advice? This is the specimen
It had a thick white thallus.. and I can see a mollusc had been enjoying it..
Unfortunately we did not test it with chemicals
Dobson says R umbilicatum is C -, K+ yellow
S. candicans: K- P+ orange and presumably C-
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The next day I was at a limestone wall above at 350m near Leck Beck, Lancashire (almost Yorks and almost Cumbria) and I found this lichen which I thought was R umbilicatum and tested it with K. After about 5 min it went this mangey yellow (and nothing with C)
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| Rhizocaropon umbilicatum Wall between Leck Beck and Leck Fell House |
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| Rhizocaropon umbilicatum Wall between Leck Beck and Leck Fell House |
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| Rhizocaropon umbilicatum Wall between Leck Beck and Leck Fell House |
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Here are some pics I have taken in other places when I have been sure it was S candicans in the past. These all have a distinctily placodioid thallus (-thallus with pleated edge)
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| Solenopsora candicans |
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| Solenopsora candicans Ingleton |
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| Solenopsora candicansIngleton |
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| Solenopsora candicans - Winskill Stones |
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| Solenopsora candicans High Hill Settle |
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Rhizocarpon umbilicatum
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| R umbilicatum Highfolds with Allan Pentecost |
Earlier we had found this pale yellow Caloplaca on the church wall at Kettlewell. Because of its colour I said "Caloplaca limonia".
But looking at pictures on the internet all the internet pictures I am not so sure.
Possible C limonia ??
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