Links:

• The Families of Flowering Plants: Descriptions, Illustrations, Identification, and Information Retrieval. L. Watson and M. J. Dallwitz. University of New Orleans. http://biodiversity.uno.edu/delta/.
• Images and Descriptions of Flowering Plant Families (as treated by Arthur Cronquist). Gerald D. Carr. University of Hawaii. http://www.botany.hawaii.edu/faculty/carr/fpfamilies.htm.
• Angiosperm Phylogeny - MOBOT
• Systematics of Flowering Plants (Biology 260) - University of Illinois
• Angiosperm Images
• Angiosperm Structure and Function - From an introductory Biology course at Cornell University
• Biology 211: Taxonomy of Flowering Plants - Colby College
• Flowering Plant Gateway - Texas A&M
• Introduction to the Flowering Plants - University of the West Indies
• Floridata
• Parasitic Plants