Common names: E
- eared willow
- earleaf bellflower
- early crocus
- early dog violet
- East Asian stripe maple
- Easter cactus
- Easter redbud
- eastern American black walnut
- eastern arborvitae
- eastern blue star
- Eastern Cape giant cycad
- eastern flowering dogwood
- eastern galega
- eastern hemlock
- eastern prickly pear
- eastern smooth beard tongue
- eastern teaberry
- Eastern white pine
- edelweiss
- edging lobelia
- eglantine
- Egyptian lavender
- Egyptian star cluster
- Einkorn wheat
- elder
- elecampane
- elegant zinnia
- elephant bush
- elephant cactus
- elephant climber
- elephant yam
- elephant's ear
- elephant's foot
- elkhorn fern
- elm
- emerald vine
- Emmer wheat
- endive
- Endres cranesbill
- English plantain
- english rose
- English rose
- English walnut
- English whitebeam
- erect clematis
- Erman's birch
- eryngo
- eternal flame
- Ethiopian eggplant
- eucalypt
- Eurasian aspen
- Eurasian smoke tree
- Eurasian thyme
- European ash
- European aspen
- European barberry
- European beech
- European birthwort
- European bladdernut
- European bur-reed
- European centaury
- European columbine
- European cornel
- European crab apple
- European dogbane
- European fan palm
- European field elm
- European globeflower
- European goldenrod
- European holly
- European honeysuckle
- European hop hornbeam
- European hornbeam
- European larch
- European Michaelmas daisy
- European redbud
- European searocket
- European service berry
- European spindle
- European violet willow
- European wand loosestrife
- European white birch
- European white elm
- European wild ginger
- European wild pear
- European yew
- evening primrose
- evergreen candytuft
- evergreen magnolia
- evergreen maidenhair fern
- evergreen oak
- evergreen viburnum
- everlasting
- everlasting pea
- exploding cucumber
- eyebright
- eyelash begonia
- eyelash pearl grass
- eyewort