Apothecia, young; Habitat: Basalt talus and outcrops in steppe with scattered Juniperus; Location: Above Twickenham-Bridge Cr Cutoff Road, south of John Day River; Substrate: Rock, basalt outcrops and talus; Elevation: 736 meters; Notes: Acarospora cf. peliscypha det Knudsen 2011.
Field habit; Habitat: Dwarf Artemisia, near barren, pebbles and boulders; Location: Top of ridge just W of Hotsprings Campground, Hart Mt National Antelope Refuge; Substrate: Rock, rhyolite outcrop; Elevation: 2173 meters.
Asci K-IKI; Habitat: Basalt cliffs, partly forested; Location: Just west of Cold Spring Camp, 6 km west of Sisters, east slope of Cascade Range; Substrate: Rock, basalt outcrop; Elevation: 1048 meters.
Habit; Habitat: Exposed volcanic rock on mountain top; Location: Rim of crater of South Sister, Cascade Range; Substrate: Rock, volcanic; Elevation: 3147 meters; Notes: A. socialis, ver. K. Knudsen 2010.
Apothecial section; Habitat: Basalt talus and outcrops in steppe with scattered Juniperus; Location: Above Twickenham-Bridge Cr Cutoff Road, south of John Day River; Substrate: Rock, basalt outcrops and talus; Elevation: 736 meters; Notes: Acarospora cf. peliscypha det Knudsen 2011.
Areoles; Habitat: Rhyolite barrens with sparse bunchgrasses and abundant Selaginella; Location: Above John Day River, just S of junction of Routes 19 and 207; Substrate: Rock, rhyolite; Elevation: 780 meters.
Field habit; Habitat: Igneous outcrops; Location: Hart Mt. Antelope Refuge, low mound of rock on Blue Sky Road, east of butte; Substrate: Rock, igneous outcrop; Elevation: 1784 meters.
Lower; Habitat: Rhyolite barrens with sparse bunchgrasses and abundant Selaginella; Location: Above John Day River, just S of junction of Routes 19 and 207; Substrate: Rock, rhyolite; Elevation: 780 meters.
Habit; Habitat: Rhyolite barrens with sparse bunchgrasses and abundant Selaginella; Location: Above John Day River, just S of junction of Routes 19 and 207; Substrate: Rock, rhyolite; Elevation: 780 meters.