Ilex anomala
- Several photographs of this species growing in its natural habitat in Hawaii.
- http://jupiternielsenflameworking.com/hawaiianflora/kawa_u.html

Ilex aquifolium
- Photographs of leaves, flowers and berries of the Holly, and a description of the tree.
- http://www.plant-identification.co.uk/skye/aquifoliaceae/ilex-aquifolium.htm

IIex myrtifolia (Myrtle Leaf Holly)
- Describes physical features and provides photos of twig, bark, leaves, and form.
- http://www.cnr.vt.edu/dendro/dendrology/Syllabus2/imyrtifolia.htm

Ilex verticillata (Common Winterberry)
- Photos of entire tree, bark, twig, leaf, flower, and fruit.
- http://www.cas.vanderbilt.edu/perl/bioview.pl?genspec=ilve&action=View

Ilex opaca (American Holly)
- Detailed facts on habitat and life history, including native range, supporting soils, associated forest cover, reproduction, and growth.
- http://www.na.fs.fed.us/spfo/pubs/silvics_manual/volume_2/ilex/opaca.htm

Ilex decidua (Possumhaw)
- Images of entire tree, bark, twig, leaf, flower, and fruit.
- http://www.cas.vanderbilt.edu/perl/bioview.pl?genspec=ilde&action=View

Ilex coriacea (Large Gallberry)
- Describes physical characteristics of leaf, flower, fruit, twig, and bark. Includes images.
- http://www.cnr.vt.edu/dendro/dendrology/syllabus/icoriacea.htm

Ilex cassine (Dahoon Holly)
- Images and brief facts.
- http://aquat1.ifas.ufl.edu/ilecas.html

Ilex aquifolium (Common Holly)
- Physical description, range, habitat, and biology. Includes a photo.
- http://www.arkive.org/species/ARK/plants_and_algae/Ilex_aquifolium/more_info.html

IIex amelanchier (Sarvis Holly)
- Describes physical features and provides photos of twig, leaf, bark, and form.
- http://www.cnr.vt.edu/dendro/dendrology/Syllabus2/iamelanchier.htm

Ilex verticillata
- Photo and brief description of this species.
- http://www.biologie.uni-ulm.de/systax/dendrologie/ilexvertifr.htm

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

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

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

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

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

Ilex paraguariensis
- Photo of this plant's flower.
- http://www.botany.hawaii.edu/faculty/carr/images/ile_par_fl.jpg