From Natural History of Southeast Alaska
- Search Arctos Database for Cladonia cornuta (Southeast only)
- Search Arctos Database for Cladonia cornuta (entire database)
- Encyclopedia of Life search for Cladonia cornuta
- iNaturalist Observations for Cladonia cornuta in Southeast Alaska
- Geiser Dillman Derr Stensvold 1998: Abundant; on bark of conifers (except Pinus contorta) and deciduous shrubs in many forest types. Also in humus with other lichens and mosses, sometimes in rock crevices, in open areas.