Observation 187061: Caloplaca nivalis (Körber) Th. Fr.
When: 2014-11-02

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

best photos I could find – http://www.stridvall.se/lichens/gallery/Caloplaca?page=19

considered very rare, particularly at latitudes south of Canada, but was locally abundant where I found it

Proposed Names

83% (1)
Eye3 Eyes3
Used references: Thomson, J.W. (1997) American Arctic Lichens, 2. The Microlichens; 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; McCune’s key Caloplaca in Pacific Northwest, Revised July 2011 at http://people.oregonstate.edu/~mccuneb/Caloplaca.pdf;
Based on microscopic features: very distinctive spores for a Caloplaca, described in Smith et al. as “25-30 × 3-5 µm, narrowly ellipsoid, sometimes with a median indentation and then slipper-shaped, straight to curved, simple, occasionally with signs of a pseudoseptum” – see my photos; my spores extremely variable but average ≈ 23 × 4 µm

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2014-11-02 19:52:36 GMT (+0000)
Last modified: 2014-11-02 19:52:51 GMT (+0000)
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