Private Herbarium of Jason Hollinger (hb. Hollinger)
Rhizocarpon superficiale (Schaer.) Vain.
Rhizocarpaceae
Jason Hollinger (2014-10-10)
ID certainty: positive
Jason Hollinger
8132
2014-10-10
United States, Nevada, Pershing County, Humboldt Range, Black Canyon, last switchback on faint mining track at head of canyon
40.5463 -118.1956 +-5m.
2375 meters (7790ft)
large rhyolite boulder high on steep south-facing slope with dense _Artemisia_ and scattered juniper
vertical side of rhyolite boulder
Pleopsidium flavum
marginal areoles subplacodioid, areoles bright to slightly pale yellow bumpy convex dull leaving lots of black hypothallus visible, medull K+y-o C- KC- I- P+o strong, apothecia ~round discose black between areoles, epihymenium ~aeruginose-black K-, hymenium aeruginose in upper half or more, hypothecium red-brown, exciple dark brown K+ bleeding yellow turning slowly orangish but never any crystals, spores 8 per ascus 1-septate dark gray-brown ~smooth ~13x8um