Notes: On Andreaea on Si rock in talus in open at ≈1070m elevation

Interesting that Frutidella caesioatra (syn include Lecidea caesioatra, Lecidella caesioatra) seems very similar. Smith et al. generic key p.63 has:
60
on soil, plant debris or bryophytes in montane habitats; apothecia dark blue-grey to black – 61
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apothecia thinly blue-grey pruinose (with bluish bloom when wet – Fruitidella caesioatra / apothecia not pruinose (without bluish bloom when wet) siliceous rock or lichenicolous – Lecidella wulfenii.
(F. caesioatra is UV+ blue-white)

microscopic features didn’t post -
hymenium 75µm, 8 spores/ascus average 16 × 8µm
UV neg

references didn’t post -
Smith, C.W., Aptroot, A., Coppins, B.J., Fletcher, A., Gilbert, O.L., James, P.W. and Wolseley, P.A. (2009) The Lichens of Great Britain and Ireland
Thomson, J.W. (1997) American Arctic Lichens, 2. The Microlichens