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|I’d Call It That||3.0||6.23||1||(Andrew)|
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But could definitely be C. squamosa, too. C. scabriuscula according to most authors is distinguished by soredia at the tips. T. Goward plays this character down, presumably since it can be so scanty as to not be readily visible. Squamosa has tiny squamules completely covering the stems, and essentially no cortex between the squamules, giving the background of the stems a whitish to brownish to translucent look. Scabriuscula is distinctly corticate at least in the bottom half, and has squamules mostly on the upper side of leaning stems (asymmetrically arranged). K and P and UV tests would also distinguish the two: scabriuscula has fumarprotocetraric acid (K+brown P+r UV-), squamosa has squamatic (K- P- UV+ice) or thamnolic acid (K+y P+y UV-).