Celtis iguanaea
- Description and photographs of this spiny climbing plant.
- http://www.cybertruffle.org.uk/vinales/eng/celtis_iguanaea.htm

Celtis trinervia
- Description of this tree and photographs of shoots and leaves.
- http://www.cybertruffle.org.uk/vinales/eng/celtis_trinervia.htm

Celtis laevigata (Sugarberry)
- Description and photos.
- http://www.cnr.vt.edu/dendro/dendrology/syllabus/claevigata.htm

Celtis reticulata
- Information on distribution and occurrence, value and use, characteristics, and fire ecology.
- http://www.fs.fed.us/database/feis/plants/tree/celret/

Celtis occidentalis
- Information on distribution and occurrence, value and use, characteristics, and fire ecology.
- http://www.fs.fed.us/database/feis/plants/tree/celocc/

Celtis laevigata
- Information on distribution and occurrence, value and use, characteristics, and fire ecology.
- http://www.fs.fed.us/database/feis/plants/tree/cellae/

Celtis australis
- Photo of branch of this tree.
- http://www.dipbot.unict.it/orto/0245-1.html

Celtis sinensis
- Closeup image of this species.
- http://www.botany.hawaii.edu/faculty/carr/images/cel_sin.jpg

Celtis aetnensis
- Images of this species.
- http://www.dipbot.unict.it/orto/0246-1.html