Plants with white flowers
 Circaea alpina (Small Enchanter's-Nightshade) |
 Claytonia lanceolata (Lance-Leaved Spring Beauty) |
 Clematis ligusticifolia (Western Clematis) |
 Collinsia parviflora (Blue-eyed Mary) |
 Comandra umbellata (Pale Comandra) |
 Convolvulus arvensis (Field Bindweed) |
 Conyza canadensis (Canada Fleabane) |
 Coptis trifolia (Goldthread) |
 Corallorhiza maculata (Spotted Coralroot) |
 Corallorhiza trifida (Early Coralroot) |
 Coriandrum sativum (Coriander) |
 Cornus canadensis (Bunchberry) |
 Cornus sericea (Red-Osier Dogwood) |
 Crataegus chrysocarpa (Round-Leaved Hawthorn) |
 Crataegus douglasii (Black-Fruited Hawthorn) |
 Cryptantha celosioides (Clustered Oreocarya) |
 Cryptantha fendleri (Fendler's Cryptanthe) |
 Cuscuta gronovii (Dodder) |
 Cymopterus glomeratus (Plains Cymopterus) |
 Cypripedium candidum (Small White Lady's Slipper) |
 Cypripedium montanum (Mountain Lady's Slipper) |
 Cypripedium passerinum (Franklin's Lady's Slipper) |
 Dalea candida (White Prairie-Clover) |
 Doellingeria umbellata (Flat-Topped White Aster) |
 Draba reptans (Creeping Whitlow-Grass) |
 Drosera anglica (Oblong-leaved Sundew) |
 Drosera linearis (Slender-Leaved Sundew) |
 Drosera rotundifolia (Round-leaved Sundew) |
 Drymocallis arguta (White Cinquefoil) |
 Echinocystis lobata (Wild Cucumber) |
 Ellisia nyctelea (Waterpod, Aunt Lucy) |
 Epilobium palustre (Marsh Willowherb) |
 Eremogone congesta (Rocky Ground Sandwort) |