Asclepiadaceae
- Botanical description of this family with technical drawings of several species.
- http://delta-intkey.com/angio/www/asclepia.htm

The Asclepiad Page
- Thorough introduction to this diverse plant family which includes milkweeds, the hoya, and numerous succulents. Includes cultivation notes and worldwide links.
- http://www.succulent-plant.com/asclepiad.html

The Asclepiadaceae
- Description of the plant family, with descriptions and images of some of its members.
- http://www.botany.hawaii.edu/faculty/carr/asclepiad.htm