Ear Muhly
Early Bluetop Fleabane
Early Buttercup
Early Sedge
Earthsmoke
Eastern Cottonwood
Eastern Pasqueflower
Eastern Purple Coneflower
Eastern Redcedar
Eastern Sensitive Plant
Ebony Sedge
Ebony Spleenwort
Echinocystis
Egeria
Egg Milkvetch
Egyptian Grass
Eightpetal Mountain-avens
Elderberry
Elegant Aster
Elegant Cinquefoil
Elegant Milkvetch
Elegant Stitchwort
Elephanthead Lousewort
Elkweed
Elliptical Buttercup
Ellisia
Elm
Elongated Mustard
Endolepis
Engelmann Spruce
English Cinquefoil
English Sundew
Entireleaved Thelypody
Ephedra Buckwheat
Erect Spiderling
Eryngo
Eurasian Watermilfoil
Europe Sage
European Bur-reed
European Mountain Ash
European Privet
European Stickseed
European White Birch
Eutrema