Private Herbarium of Jason Hollinger
(hb. Hollinger)
Taxon: Rhizocarpon geminatum Körb.
Family: Rhizocarpaceae
Determiner: Jason Hollinger (2014-10-09)
ID Remarks: ID certainty: positive
Collector: Jason Hollinger   7681   
Date: 2014-10-09
Locality: 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.
Elevation: 2035 meters (6675ft)
Habitat: vertical black-stained drainage channel in tall south-facing rhyolite cliff; _Artemisia_, desert scrub and scattered junipers
Substrate: vertical granite near drainage channel
Notes: 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
Specimen Images
Record ID: 751d819f-67f2-4f0a-836f-cabd9672355c
For additional information on this specimen, please contact: Jason Hollinger (
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