Observation 118892: Lecanora saligna (Schrader) Zahlbr.
When: 2012-11-28
(34.2432° -117.663° 1453m)
Herbarium specimen reported

Notes: SUBSTRATE base of Pseudotsuga macrocarpa; ASPECT shaded; NOTES minutely verrucose grayish-greenish-brownish crust on bark, apparently all negative but acetone extract was distinctly reddish-brown in K not fading with addition of C, otherwise K- C- KC- UV- P- (including apothecia), apothecia tiny with yellowish-brownish-greenish thin rims and dark epruinose red-brown disks, epihymenium yellow-brown granular POL- clearing in K, amphithecium with thin uniform cortex POL+ yellowish clearing in K, spores 10-11 × 3-4 µm 8 per ascus.


at 30x (note, sorediate green-gray crust is probably Trapeliopsis flexuosa because it was faintly C+ pink)
apothecial section, in water, at 100x
apothecial section, in water, at 100x, cross-polarized

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It’s such a useful little tool
By: Jason Hollinger (jason)
2012-12-09 04:16:41 CST (-0500)

And so easy to use once you’ve got your scope set up for it. Can make it so much easier to see anatomical features like cortex thickness, too. This one stumped me though, because POL+ generally means there’s some lichen substance crystallized there, but this was completely negative to all tests. Just isousnic acid. Hmmm, that’s odd in itself: isousnic almost always accompanies usnic acid, so rare to find it by itself. I wonder if it reacts KC+ and UV+ like usnic? Maybe not…

Awesome pic with the polarizing photos
By: nastassja (Nastassja Noell)
2012-12-09 02:31:11 CST (-0500)

cool seeing those crystal light up!!!

Created: 2012-12-04 02:17:03 CST (-0500)
Last modified: 2012-12-05 13:54:18 CST (-0500)
Viewed: 34 times, last viewed: 2017-06-14 13:18:32 CDT (-0400)
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