Distribution: Largely west of Cascades in Washington; northern British Columbia to southern California, northern Michigan and Wisconsin, coastal Maine, New Hampshire and Massachusetts, Missouri, Arkansas, Oklahoma, Texas, Louisiana, southern Mississippi and Alabama, South Carolina, Georgia, Florida.
Habitat: Shaded areas.
Substrate: Bark of all kinds, occasionally on rock.
Conservation Status: Not of concern
Thallus bright yellow, occasionally flecked with orange, comprised entirely of fine powdery soredia less than 0.1 mm.