Apothecia; Habitat: Basalt cliffs and upper part of talus, exposed NW slope; Location: Near top of ridge, Chandler Butte, Horse Heaven Hills, S of Benton City; Substrate: Rock, basalt; Elevation: 615 meters; Notes: P. atriseda det. Singh et al. 2015. Genbank: KP822398; KF562190; KF562182; KF601236; KF562173; KP823458.
Hymenium; Habitat: Basalt cliffs and upper part of talus, exposed NW slope; Location: Near top of ridge, Chandler Butte, Horse Heaven Hills, S of Benton City; Substrate: Rock, basalt; Elevation: 615 meters; Notes: P. atriseda det. Singh et al. 2015. Genbank: KP822398; KF562190; KF562182; KF601236; KF562173; KP823458.