The Families of Flowering Plants
A taxonomical database with descriptions and illustrations of each family, and an interactive key to families.
OSU Seed Biology Program - SeedID Index
Photographs of the seeds of selected plants.
Angiosperms Image Gallery
Extensive collection, organized by family.
Flowering Plant Gateway
Various paths for exploration or comparison of four major flowering plant classification systems (Cronquist, Takhtajan, Thorne and the Angiosperm Phylogeny Group system). From Texas A&M University.
Angiosperm Phylogeny
Phylogenetic trees, technical descriptions of all orders and families, references, and links. By Peter Stevens of the Missouri Botanical Garden.
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