When: 2016-10-07

Collection location: Monterey Co., California, USA [Click for map]

35.8785°N 120.3285°W 512m [Click for map]

Who: J-Dar

Specimen available

On conglomerate rock, in a semi-arid grassland setting. Full sun, northeast aspect.

Thallus placodioid, light bown, K+R (abundant norstictic acid crystals at 100x), lobes convex, +/- imbricate, solid, pruinose and darkening at tips, slightly lifting from substrate. Apothecia lecanorine, mature in center, young on lobes, thalline margin pruinose so it looks like a white rim around a black disk, disk also lightly pruinose. Algae layer thick across base of apothecia. Hymenium hyaline, but dingy. Epihymenium brown, becoming light brown-orange in K. Paraphyses unbranched, distinctly moniliform.


100x in water
400x in water
100x in K
Apothecial section
Apothecial section with norstictic acid crystals at bottom
K/I blue reaction.

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