Collection location: Chorro Park, San Luis Obispo Co., California, USA [Click for map]
On sandstone bedrock in coastal grassland setting. The site is a large somewhat flat bedrock outcrop with Indian grinding holes. It is along a popular trail and gets people walking on the lichens regularly, hence this specimen had somewhat depressed apothecial margins. A flake of the sandstone had been dislodged by hikers, so I picked it up and decided to give the lichen a future home in the herbarium.
Thallus white, thick, rimose, with convex or irregularly angular areoles. Cortex K+Y. Thalline margin persistent, white. Disk black, epruinose, shiny. Epihymenium strongly green, with a 10-15µm thick epinecral layer. POL+ small crystals in center where disk was deeply concave and epihymenium brown, but otherwise POL- where normal and green. Hymenium hyaline, about 80µm tall, amyloid (IKI+blue). Amphithecium with large POL+ crystals insoluble in K, and cortex POL+ white like the medulla below the apothecia. Algae interrupted below the apothecia. Large POL+ crystals occasional in medulla below apothecia.
Spores 8 per ascus, simple, hyaline, broadly ellipsoid, about 12-13 × 7-8µm.
|I’d Call It That||3.0||11.12||2||(jason,J-Dar)|
sum(score * weight) /
(total weight + 1)
Created: 2018-11-30 22:40:31 CST (+0800)
Last modified: 2018-11-30 23:32:44 CST (+0800)
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