Collection location: Monterey Co., California, USA [Click for map]
On crumbling shale bedrock outcropping in a semi-arid grassland environment, along an ephemeral drainage. Full sun southwestern exposure.
Thallus yellow-brown, shiny, consisting of scattered or clumped areoles with 1 to many apothecia each. Algal layer in thallus is distinctly interrupted by hyphal bundles. Areoles are convex, becoming squamulose, with fissures and pits. Apothecia are sunken in areoles, with reddish coloration on rims, disks are dark red-brown, roughened. Hymenium hyaline, hypothecium dingy, epihymenium brown. Spot tests are negative. However, a little K left on the slide from a previous specimen review resulted in yellow pigments diffusing into the surrounding water. C test was definitely negative, but the resulting KC was reddish from the contaminated slide.
Spores many per ascus, simple, hyaline, ellipsoid. 4-5 × 1.5-2.0µm.
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sum(score * weight) /
(total weight + 1)