The Plant List - verify all accepted family, genus, and species Latin names
Tree of Life Web Project - an interactive tree of life
Angiosperm Phylogeny Website - great tool for Plant Systematics research
Botanical Latin - learn what plant names mean in Latin
List of Latin and Greek Roots in English - Wikipedia list
Flora of North America - resource for identifying plants
Time Tree - estimates the divergence in millions of years, of two species
Origin of Flowering Plants - introduction to Paleobotany
Jeff's Nature Home Page - List of local plants, animals, and fungi