Habit; Habitat: Calcareous outcrops in heavily grazed grassland; Location: Monida Ridge, 2 km NE of Monida; Substrate: Soil over HCl+ rock; Elevation: 2195 meters.
Habit; Habitat: Calcareous outcrops in heavily grazed grassland; Location: Monida Ridge, 2 km NE of Monida; Substrate: Soil over HCl+ rock; Elevation: 2195 meters.
Apothecia; Habitat: Juniperus and calcareous rock at water's edge; Location: South shore of Bull Island in Flathead Lake; Substrate: Soil over rock, HCl+; Elevation: 890 meters; Notes: Psora tuckermanii det. Timdal 1985.
Squamules; Habitat: Artemisia rigida steppe, thin soil over basalt outcrops; Location: 1 km N of Sprague, Columbia Plateau; Substrate: Soil; Elevation: 610 meters.
Squamules, young; Habitat: Artemisia arbuscula - Artemisia tridentata - Purshia tridentata steppe; Location: Gentle slopes at crest of Sage Hen Summit, 20 km W SW of Burns; Substrate: Soil and grass stubble; Elevation: 1400 meters.
Hymenium; Habitat: Artemisia arbuscula - Artemisia tridentata - Purshia tridentata steppe; Location: Gentle slopes at crest of Sage Hen Summit, 20 km W SW of Burns; Substrate: Soil and grass stubble; Elevation: 1400 meters.
Exciple; Habitat: Artemisia arbuscula - Artemisia tridentata - Purshia tridentata steppe; Location: Gentle slopes at crest of Sage Hen Summit, 20 km W SW of Burns; Substrate: Soil and grass stubble; Elevation: 1400 meters.
Habit; Habitat: Open rock and grassy areas with Quercus garryana and Pseudotsuga; Location: Camp Creek Cliffs, south slopes north of Cispus River; Substrate: Soil over rock, andesite; Elevation: 460 meters.
Apothecia; Habitat: Marble outcrops on slope with patchy Pseudotsuga forest; Location: Below Marble Point on trail to Francis Lake, Wallowa Mountains; Substrate: Rock, marble outcrops; Elevation: 1800 meters.