Angiosperms
- Photographs and comprehensive information on flowering plants from the Tree of Life web project.
- http://tolweb.org/Angiosperms/20646

Chilean Flora
- On-line herbarium of over 1100 Chilean plants, articles on Chilean flora, and seeds and seedlings of Chilean plants for sale.
- http://www.chileflora.com

The Families of Flowering Plants
- A taxonomical database with descriptions and illustrations of each family, and an interactive key to families.
- http://delta-intkey.com/angio/

Angiosperms Image Gallery
- Extensive collection, organized by family.
- http://www.albion.edu/plants/gallery.asp?gallery=Angiosperms

Angiosperm Phylogeny
- Phylogenetic trees, technical descriptions of all orders and families, references, and links. By Peter Stevens of the Missouri Botanical Garden.
- http://www.mobot.org/MOBOT/Research/APweb/

OSU Seed Biology Program - SeedID Index
- Photographs of the seeds of selected plants.
- http://www.ag.ohio-state.edu/~seedbio/seed_id/index.html

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.
- http://www.csdl.tamu.edu/FLORA/newgate/cronang.htm