Platanus occidentalis L
- Detailed description of the tree, its range, lifecycle, usage for forestry, and genetics.
- http://www.na.fs.fed.us/spfo/pubs/silvics_manual/volume_2/platanus/occidentalis.htm

American Sycamore
- Descriptions of features, and a collection of photographs.
- http://www.fcps.k12.va.us/StratfordLandingES/Ecology/mpages/american_sycamore.htm

Platanus occidentalis
- Common names: American sycamore, plane tree, or buttonball tree. Species information including distribution, use, characteristics, ecology.
- http://www.fs.fed.us/database/feis/plants/tree/plaocc/

American Sycamore - Platanus occidentalis
- Description and photos.
- http://www.hiltonpond.org/ThisWeek001208.html