Helianthus tuberosus
- A short description of the Jerusalem artichoke, including cultivation and medicinal uses.
- http://www.botanical.com/botanical/mgmh/a/artic065.html

Helianthus annuus
- Image showing the flower in closeup, illustrating ray and disc florets, and the developing seeds.
- http://www.botany.hawaii.edu/faculty/carr/images/hel_ann.jpg