skullroy's Identifications

I found this placodioid brown crust on a boulder in a grassy field and collected a portion with permit for UCD. It has numerous tiny spores per ascus, the hymenium height is roughly 100-130 microns, and the thallus is K negative, P negative and C plus pink (faint transient flush of pink under compound scope).

This yellow-green areolate crust was growing abundantly on sandy soil. I collected some thalli with a permit. As best I can tell, the specimens are sterile with numerous pycnidia, perhaps a lichenicolous fungus on an Acarospora?

Areolate cream-to-buff colored crustose lichen on sandstone (?) that reacted strongly with HCl, collected a portion with permit.

Areoles about 1 mm, apothecia about 0.5 mm in diameter. Spores 8/ascus, brown, four-celled with transverse septae but not muriform in the ones I can see well. Spore length varied considerably, from about 20-32 microns. The spores are notably distorted when seen within an intact ascus. The thallus was K and P negative, both under the scope in thin sections and as applied to the areoles under a dissecting scope.