From Natural History of Southeast Alaska
- PacNW Herbaria Records for Nephroma occulttum
- Search Arctos Database for Nephroma occultum (Southeast only)
- Search Arctos Database for Nephroma occultum (entire database)
- Encyclopedia of Life search for Nephroma occulttum
- iNaturalist Observations for Nephroma occulttum in Southeast Alaska
- Geiser Dillman Derr Stensvold 1998: On Picea sitchensis; Chilkoot Lake State Recreation Area. A rare; old growth dependent lichen known from BC south to Washington to Oregon. The ecological epicenter of this lichen is considered to be the transition zone between oceanic and humid continental climates (Goward 1995, Wetmore 1980).