A wildflower (or wild flower) is a flower that grows in the wild, meaning it was not intentionally seeded or planted. Yet "wildflower" meadows of a few mixed species are sold in seed packets. The term implies that the plant probably is neither a hybrid nor a selected cultivar that is in any way different from the way it appears in the wild as a native plant, even if it is growing where it would not naturally.
"Wildflower" is not an exact term. Terms like native species (naturally occurring in the area, see flora), exotic or, better, introduced species (not naturally occurring in the area), of which some are labelled invasive species (that out-compete other plants – whether native or not), imported (introduced to an area whether deliberately or accidentally) and naturalized (introduced to an area, but now considered by the public as native) are much more accurate.
In the United Kingdom, the organisation Plantlife International instituted in 2002 the County Flowers scheme whereby members of the public nominated and voted for a wild flower emblem for their county. The aim was to spread awareness of the heritage of native species and about the need for conservation, as some of these species are endangered. For example, Somerset has adopted the Cheddar Pink (Dianthus gratianopolitanus), London the Rosebay Willowherb (Chamerion angustifolium) and Denbighshire/Sir Ddinbych in Wales the rare Limestone Woundwort (Stachys alpina).
- Adonis aestivalis - summer pheasant's-eye
- Anthemis arvensis
- Agrostemma githago
- Centaurea cyanus
- Coreopsis tinctoria
- Dianthus barbatus
- Digitalis purpurea
- Eschscholzia californica - California Poppy
- Gypsophila elegans
- Glebionis segetum
- Papaver rhoeas
- Silene latifolia
- Viola tricolor
- List of San Francisco Bay Area wildflowers
- Native plant
- Spring ephemeral
- Wildflowers of the Canadian Rocky Mountains
- Wildflowers of the Great Smoky Mountains
- North American Native Plant Society, formerly the Canadian Wildflower Society
- HDRA encyclopedia of organic gardening by Pauline Spears
- Wildflower Magazine promotes the use and conservation of wildflowers and native plants, Lady Bird Johnson Wildflower Center. Formerly published by the North American Native Plant Society
- Plantlife, UK organisation
- Wildflower in Cyprus Information on 1250 native plant species to North Cyprus.
- Photo guide to European flowers
- North American Wildflower Guide identification by color and petals, using Flickr content
- Ontario Wildflowers Detailed information about wildflowers of Ontario (Canada) and Northeastern North America
- Western USA wildflower reports
- NPIN: Native Plant Database
- Native Plant Database from the North American Native Plant Society