Kingdom: Plantae (plants)
Division: Anthocerotophyta (hornworts)
Division: Bryophyta (mosses)
Division: Hepatophyta (liverworts)
Subkingdom: Tracheobionta (vascular plants)
Division: Equisetophyta (horsetails)
Division: Lycopodiophyta (ferns)
Division: Psilophyta (whisk-ferns)
Division: Pteridophyta (ferns)
Superdivision: Spermatophyta (seed plants)
Division: Coniferophyta (conifers)
Division: Cycadophyta (cycads)
Division: Ginkgophyta (ginkgo)
Division: Gnetophyta (mormon-teas and other gnetophytes)
Division: Magnoliophyta (flowering plants)
Class: Liliopsida (monocotyledons)
Class: Magnoliopsida (dicotyledons)
Subclass: Asteridae
Subclass: Caryophyllidae
Subclass: Dilleniidae
Order: Batales
Order: Capparales
Order: Diapensiales
Order: Dilleniales
Order: Ebenales
Order: Ericales
Order: Lecythidales
Order: Malvales
Order: Nepenthales
Order: Primulales
Order: Salicales
Order: Theales
Order: Violales
Family: Begoniaceae (Begonia family)
Family: Bixaceae (Lipstick-tree family)
Family: Caricaceae (Papaya family)
Family: Cistaceae (Rock-rose family)
Family: Cucurbitaceae (Cucumber family)
Family: Datiscaceae (Datisca family)
Family: Flacourtiaceae (Flacourtia family)
Family: Frankeniaceae (Frankenia family)
Family: Loasaceae (Loasa family)
Family: Passifloraceae (Passionflower family)
Family: Tamaricaceae (Tamarix family)
Family: Turneraceae (Turnera family)
Family: Violaceae (Violet family)
Species: Viola canadensis (Canada Violet) (~ photos ~)
Species: Viola sororia (Common Blue Violet) (~ photos ~)
Species: Viola tricolor (Johnny-Jump-Up) (~ photos ~)
Subclass: Hamamelidae
Subclass: Magnoliidae
Subclass: Rosidae