Quercus rubra (Red Oak)
- Photos of fruit, leaf, bud, flower, bark, and form.
- http://www.treecanada.ca/trees/species_info.php?species_id=224&lang=en

Quercus rubra (Northern Red Oak)
- Describes physical characteristics and provides photos of mature tree, leaf, acorn, twig, and bark.
- http://www.cnr.vt.edu/dendro/dendrology/syllabus/qrubra.htm

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