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/

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

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

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

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

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

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/