Collection location: Los Osos, California, USA [Click for map]
On bark in the coastal zone, on the back edge of Morro Bay. Extreme maritime influence.
Thallus a whitish crust almost completely covered in yellow to green soredia, C+R, KC+R, K-. Trentopohlioid agae. Apothecia uncommon, immersed to sessile, thick raised margin with algae, disk and margin with white C- pruina. In section the apothecia shows a dark carbonaceous hypothecium and exciple, a short hymenium, and dark epihymenium. The hypothecium is K+green.
Spores are narrowly ellipsoid, hyaline and few and far between. I couldn’t tell details but they appeared multi-septate.
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sum(score * weight) /
(total weight + 1)