Fraxinus
- Profiles of all US species of ash.
- http://plants.usda.gov/java/profile?symbol=FRAXI

FRAXIGEN
- Project strengthening the scientific basis for sustainable conservation/regeneration of European Fraxinus (ash tree) populations, through full understanding of the biological/ecological processes shaping this species.
- http://www.fraxigen.net/

Fraxinus anomala
- Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.
- http://www.fs.fed.us/database/feis/plants/shrub/fraano/

Fraxinus pennsylvanica
- Describes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.
- http://www.fs.fed.us/database/feis/plants/tree/frapen/

Fraxinus nigra
- Includes distribution and occurrence, botanical and ecological characteristics, value and use, and fire ecology.
- http://www.fs.fed.us/database/feis/plants/tree/franig/

Fraxinus oxycarpa
- Image of a leafy shoot in summer.
- http://www.dipbot.unict.it/orto/0571-1.html