Private Herbarium of Jason Hollinger (hb. Hollinger)
Rhizocarpon geminatum Körb.
Rhizocarpaceae
Jason Hollinger (2014-10-09)
ID certainty: positive
Jason Hollinger
7681
2014-10-09
United States, Nevada, Pershing County, Humboldt Range, Black Canyon, obvious black-stained vertical wash in steep tall cliff north of road ~100 m past switchback (~600 m past fork)
40.5419 -118.2035 +-5m.
2035 meters (6675ft)
vertical black-stained drainage channel in tall south-facing rhyolite cliff; _Artemisia_, desert scrub and scattered junipers
vertical granite near drainage channel
thallus areolate, areoles widely separate gray subglobose, medulla K+y/o strong C- KC- UV- P+o/r strong I-, apothecia black discose with thick black prominent ~pruinose rims, epihymenium dark red-brown K+r, exciple dark brown outside K+y inside no crystals, spores 2 per ascus muriform grasy to brown ~50x25um