Alnus rubra (Red Alder) - Habitat, native range, climate, associated forest cover, and detailed facts on reproduction and growth. Discusses human uses and genetics. - http://www.na.fs.fed.us/spfo/pubs/silvics_manual/volume_2/alnus/rubra.htm
Alnus rubra - Details of distribution and occurrence, value and use, plant characteristics, and fire ecology. - http://www.fs.fed.us/database/feis/plants/tree/alnrub/