Habit; Habitat: Rocky alpine summit with dark igneous rock, metal-rich rock, and marble; Location: Summit of Matterhorn, Wallowa Mountains, Eagle Cap Wilderness; Substrate: Rock, iron-rich HCl-; Elevation: 2995 meters; Notes: C. saxicola s. str. of Gaya (2009). Caloplaca saxicola det. E. Gaya 2011.
Spores; Habitat: Rocky alpine summit with dark igneous rock, metal-rich rock, and marble; Location: Summit of Matterhorn, Wallowa Mountains, Eagle Cap Wilderness; Substrate: Saxifraga oppositifolia; Elevation: 2995 meters.
Spores; Habitat: Rocky alpine summit with dark igneous rock, metal-rich rock, and marble; Location: Summit of Matterhorn, Wallowa Mountains, Eagle Cap Wilderness; Substrate: Rock, iron-rich HCl-; Elevation: 2995 meters; Notes: C. saxicola s. str. of Gaya (2009). Caloplaca saxicola det. E. Gaya 2011.
Asci; Habitat: Rocky alpine summit with dark igneous rock, metal-rich rock, and marble; Location: Summit of Matterhorn, Wallowa Mountains, Eagle Cap Wilderness; Substrate: Rock, iron-rich HCl-; Elevation: 2995 meters; Notes: C. saxicola s. str. of Gaya (2009). Caloplaca saxicola det. E. Gaya 2011.
Habit; Habitat: Rocky alpine summit with dark igneous rock, metal-rich rock, and marble; Location: Summit of Matterhorn, Wallowa Mountains, Eagle Cap Wilderness; Substrate: Rock, iron-rich HCl-; Elevation: 2995 meters; Notes: C. saxicola s. str. of Gaya (2009). Caloplaca saxicola det. E. Gaya 2011.
Ascus K; Habitat: Rocky alpine summit with dark igneous rock, metal-rich rock, and marble; Location: Summit of Matterhorn, Wallowa Mountains, Eagle Cap Wilderness; Substrate: Saxifraga oppositifolia; Elevation: 2995 meters.
Hymenium; Habitat: Rocky alpine summit with dark igneous rock, metal-rich rock, and marble; Location: Summit of Matterhorn, Wallowa Mountains, Eagle Cap Wilderness; Substrate: Saxifraga oppositifolia; Elevation: 2995 meters.
Habit; Habitat: Rocky alpine summit with dark igneous rock, metal-rich rock, and marble; Location: Summit of Matterhorn, Wallowa Mountains, Eagle Cap Wilderness; Substrate: Saxifraga oppositifolia; Elevation: 2995 meters.
Apothecial section; Habitat: Rocky alpine summit with dark igneous rock, metal-rich rock, and marble; Location: Summit of Matterhorn, Wallowa Mountains, Eagle Cap Wilderness; Substrate: Rock, iron-rich HCl-; Elevation: 2995 meters; Notes: C. saxicola s. str. of Gaya (2009). Caloplaca saxicola det. E. Gaya 2011.
