Hymenium; Habitat: Treeless bench with resistant volcanic spires; Location: Devils Garden on northeast side of Mount Adams; Substrate: Rock, rhyolite outcrop; Elevation: 2375 meters.
Spores; Habitat: Limestone cliffs and talus surrounded by Pseudotsuga forest; Location: Just upstream from constriction in valley and bridge over creek, Rock Creek, Big Snowy Mountains; Substrate: Soil and moss over HCl+ rock; Elevation: 1585 meters.
Habit; Habitat: Artemisia tridentata steppe, with calcareous sandstone outcrops and silty soil; Location: Just north of I-80, 31 km W of Wamsutter; Substrate: Rock, calcareous sandstone; Elevation: 2104 meters.
Areoles; Habitat: Artemisia tridentata steppe, with calcareous sandstone outcrops and silty soil; Location: Just north of I-80, 31 km W of Wamsutter; Substrate: Rock, calcareous sandstone; Elevation: 2104 meters.
Apothecial section; Habitat: Old Tsuga mertensiana-Abies forest; Location: Rainy Pass toward Cutthroat Pass, Pacific Crest Trail, North Cascades, Okanogan National Forest; Substrate: Bark, fallen conifer log; Elevation: 1650 meters; Notes: Spribille ID of Printzen species as Lecidea cf. rufotheca (unpubl.). Later named M. rufofusca.
Apothecia; Habitat: Old Tsuga mertensiana-Abies forest; Location: Rainy Pass toward Cutthroat Pass, Pacific Crest Trail, North Cascades, Okanogan National Forest; Substrate: Bark, fallen conifer log; Elevation: 1650 meters; Notes: Spribille ID of Printzen species as Lecidea cf. rufotheca (unpubl.). Later named M. rufofusca.
Hymenium; Habitat: Old Tsuga mertensiana-Abies forest; Location: Rainy Pass toward Cutthroat Pass, Pacific Crest Trail, North Cascades, Okanogan National Forest; Substrate: Bark, fallen conifer log; Elevation: 1650 meters; Notes: Spribille ID of Printzen species as Lecidea cf. rufotheca (unpubl.). Later named M. rufofusca.