(Principal flower color in parenthesis)
Asclepias incarnata subsp. incarnata (pink)
Asclepias tuberosa subsp. interior (orange)
Astragalus canadensis var. canadensis (white)
Dalea candida var. candida (white)
Daucus carota subsp. carota (white)
Eryngium yuccifolium var. yuccifolium (white)
Fallopia japonica var. japonica (white)
Hemerocallis fulva var. fulva (orange)
Hesperis matronalis subsp. matronalis (pink)
Lepidium virginicum subsp. virginicum (white)
Mimulus ringens var. ringens (blue)
Myosotis scorpioides subsp. scorpioides (blue)
Physalis longifolia var. longifolia (yellow)
Rudbeckia hirta var. pulcherrima (yellow)
Rudbeckia triloba var. triloba (yellow)
Senecio vulgaris subsp. vulgaris (yellow)
Silphium perfoliatum var. perfoliatum (yellow)
Sonchus asper subsp. asper (yellow)
Tragopogon dubius subsp. dubius (yellow)
Trifolium campestre subsp. campestre (yellow)
(Principal flower color in parenthesis)
Allegheny Monkey Flower (blue)
American Bamboo (white)
Black-eyed Susan (yellow)
Brown-Eyed Susan (yellow)
Butterfly Milkweed (orange)
Butterfly-weed (orange)
Button Eryngo (white)
Button Snakeroot (white)
Canada Milkvetch (white)
Canadian Milk-vetch (white)
Common Ground Cherry (yellow)
Common Groundsel (yellow)
Common Peppergrass (white)
Cup Plant (yellow)
Damask Violet (pink)
Dame's Rocket (pink)
Dame's Violet (pink)
Day Lily (orange)
Field Clover (yellow)
Fistulous Goat's-beard (yellow)
Greater Sand Goat's-beard (yellow)
Japanese Knotweed (white)
Large Hop Clover (yellow)
Long-leaf Ground Cherry (yellow)
Long-leaved Ground-cherry (yellow)
Low Hop Clover (yellow)
Mexican Bamboo (white)
Mother-of-the-evening (pink)
Night-scented Gilliflower (pink)
Orange Milkweed (orange)
Pinnate Hop Clover (yellow)
Plains Clover (yellow)
Poor Man's Pepper Grass (white)
Poor-man's Pepperweed (white)
Poor-man's-pepper (white)
Poorman's Pepperwort (white)
Prickly Sow-thistle (yellow)
Queen Anne's Lace (white)
Queen's Gilliflower (pink)
Rattlesnake Master (white)
Rattleweed (white)
Rocket (pink)
Rose Milkflower (pink)
Rose Milkweed (pink)
Small Hop-clover (yellow)
Smooth Ground Cherry (yellow)
Smooth Long-leaved Ground-cherry (yellow)
Spiny Sow-thistle (yellow)
Spiny Sowthistle (yellow)
Spiny-leaf Sow-thistle (yellow)
Swamp Milkweed (pink)
Swamp Silkweed (pink)
Sweet Rocket (pink)
Tall Ground-cherry (yellow)
Three-lobed Coneflower (yellow)
True Forget-me-not (blue)
Virginia Peppercress (white)
Virginia Peppergrass (white)
Virginia pepper-weed (white)
Western Goat's Beard (yellow)
White Prairie Clover (white)
Wild Carrot (white)
Yellow Goat's Beard (yellow)
Yellow Salsify (yellow)