Index of plants by genus
| Species | Common Name | Family |
| Echinacea pallida | Pale Purple Coneflower | Asteraceae |
| Echinacea purpurea | Purple Coneflower | Asteraceae |
| Echinocystis lobata | Wild Bur Cucumber | Cucurbitaceae |
| Elymus canadensis | Canada Wild Rye | Poaceae |
| Erigeron philadelphicus | Marsh Fleabane | Asteraceae |
| Eriocaulon compressum | Pipewort | Eriocaulaceae |
| Eryngium yuccifolium | Rattlesnake Master | Apiaceae |
| Erythronium albidum | White Trout Lily | Liliaceae |
| Euonymus atropurpurea | Wahoo | Celastraceae |
| Eupatorium maculatum | Spotted Joe Pye Weed | Asteraceae |
| Eupatorium perfoliatum | Boneset | Asteraceae |
| Eupatorium purpureum | Purple Joe Pye Weed | Asteraceae |
| Eupatorium rugosum | White Snakeroot | Asteraceae |
| Euphorbia corollata | Flowering Spurge | Euphorbiaceae |
| Euphorbia polygonifolia | Seaside Spurge | Euphorbiaceae |
© 2004 Michael Hough