(also look for regional and state-wide resources)
The Biota of North America Program (BONAP)
Plant database - North American Plant Atlas. Plants searchable by every state and county in the U.S.
Searchable plant database for California.
California Invasive Plant Council (plants to remove in CA and replace with regional native plants)
Canadian Wildlife Federation
Native plants of Canada
Flora of North America
Comprehensive database of North American plants (in beta).
Interactive database of New England plants.
Honey Bee Forage Map
Interactive map from NASA of 14 honey bee forage regions in North America with lists of forage plants in bloom sequence.
Lady Bird Johnson Wildflower Center
Searchable lists of U.S. native plants of special value to native bees, bumble bees, honey bees, butterflies and moths, and plants providing nesting structure or materials to native bees.
Native Plant Trust
Formerly New England Wildflower Society. Interactive database and information on native plants and native gardening.
National Audubon Society
Interactive native plant database.
National Wildlife Federation
Plants for Pollinators: A Collection of Favorites.
North American Native Plant Society
Tips on native plants and links to native plant societies in North America
32 pollinator plant lists by ecoregion in North America and Hawaii; educational information.
USDA PLANTS Database
Native plant database for U.S. and Canada including native range maps. Allows you to zoom in to see plant species by county.
Membership organization; Information on native plants and natural landscapes.
The Xerces Society
10 pollinator plant lists by region, fact sheets, research, educational information.