Plants — E
- Echinacea Coneflower
- Echinacea purpurea echinacea
- Echinochloa colona
- Echinops Globe Thistle
- Echinops davuricus
- Echinops echinatus Indian globe thistle
- Echinopsis pachanoi San Pedro cactus
- Echinops ritro Southern Globethistle
- Echinops sphaerocephalus
- Echium vulgare Blue Echium
- Eclipta prostrata Clavel de pozo
- Elaeagnus angustifolia Oleaster
- Elaeagnus latifolia oleaster
- Elaeagnus multiflora cherry silverberry
- Elaeagnus pungens Spiny Oleaster
- Elaeis guineensis African Oil Palm
- Elaeis oleifera American Oil Palm
- Elatostema involucratum
- Elephantopus scaber Elephant's Foot
- Elettaria Cardamom
- Elettaria cardamomum Cardamom
- Eleutherine bulbosa Lagrimas De La Virgen
- Eleutherococcus senticosus Devil's Bush
- Eleutherococcus sessiliflorus Stalkless-flower eleuthero
- Eleutherococcus sieboldianus Five-fingered Aralia
- Ellipanthus tomentosus
- Elsholtzia ciliata Crested Late-summer-mint
- Elsholtzia splendens Haichow Elsholtzia
- Elymus repens Common Couch
- Elytropappus rhinocerotis Dicerothamnus rhinocerotis
- Embelia ribes false black pepper
- Emilia sonchifolia Cupid's shaving-brush
- Empetrum nigrum
- Engelhardia spicata
- Ensete superbum Cliff Banana
- Entada phaseoloides Matchbox Bean
- Entada rheedei
- Ephedra Ephedra (plant)
- Ephedra distachya European Ephedra
- Ephedra lepidosperma
- Ephedra sinica Chinese Ephedra
- Epigaea repens Gravelroot
- Epilobium Willow Weed
- Epimedium Rowdy Lamb Herb
- Epimedium koreanum Korean barrenwort
- Epimedium sagittatum
- Equisetum Horsetail
- Equisetum arvense
- Equisetum hyemale Common Scouring Rush
- Equisetum sylvaticum
- Erigeron annuus Annual Fleabane
- Erigeron canadensis Butterweed
- Eriobotrya japonica Chinese medlar
- Eriocapitella hupehensis
- Eriocaulon buergerianum Buerger’s pipewort
- Eriocaulon sexangulare
- Eriogonum alatum wing eriogonum
- Eriogonum fasciculatum California Buckwheat
- Erodium cicutarium
- Eryngium maritimum
- Erysimum cheiranthoides
- Erysimum diffusum Diffuse wallflower
- Erysimum repandum Speading wallflower, speading treacle-mustard, bushy wallflower
- Erythranthe lewisii Lewis' monkeyflower
- Erythrina Coral trees
- Erythrina variegata India coralbean
- Erythrina verna Erythrina mulungu
- Erythronium japonicum Asian fawnlily
- Erythropalum scandens
- Erythrophleum africanum African blackwood
- Erythrophleum couminga
- Erythroxylum coca
- Erythroxylum cuneatum
- Eschenbachia blinii
- Eschscholzia parishii Parish's poppy
- Eucalyptus
- Eucalyptus amygdalina Black Peppermint
- Eucalyptus dives Blue Peppermint
- Eucalyptus globulus Bluegumtree
- Eucalyptus macarthurii Camden Woollybutt
- Eucalyptus piperita Sydney Peppermint
- Eucalyptus regnans Australian Mountain Ash
- Eucalyptus viminalis Manna gum
- Eucommia ulmoides Gutta percha
- Eugenia calycina
- Eugenia uniflora Brazil-cherry
- Euonymus alatus Burning Bush
- Euonymus atropurpureus Bitter-ash
- Eupatorium Hemp-agrimony
- Eupatorium perfoliatum
- Euphorbia
- Euphorbia alpina
- Euphorbia amygdaloides
- Euphorbia antiquorum Malayan spurge tree
- Euphorbia balsamifera balsam spurge
- Euphorbia bicolor snow on the prairie
- Euphorbia bupleurifolia
- Euphorbia candelabrum
- Euphorbia characias Albanian spurge
- Euphorbia cyparissias Cypress Spurge
- Euphorbia esula
- Euphorbia fischeriana Fischer’s spurge
- Euphorbia heterophylla
- Euphorbia hirta Ara tanan
- Euphorbia ingens Cactus spurge
- Euphorbia kansuensis
- Euphorbia lactea Devil's Walking Stick
- Euphorbia lathyris Caper Spurge
- Euphorbia milii
- Euphorbia obesa
- Euphorbia palustris Marsh Spurge
- Euphorbia pekinensis Common spurge
- Euphorbia peplus
- Euphorbia pilosa
- Euphorbia resinifera African spurge
- Euphorbia schlechtendalii
- Euphorbia serpyllifolia Thyme-leaf Spurge
- Euphorbia sewerzowii
- Euphorbia thymifolia Gulf Sandmat
- Euphorbia tirucalli African milkbush
- Euphorbia tithymaloides
- Euphrasia rostkoviana eyebright
- Euphrasia stricta Drug Eyebright
- Eupolyphaga sinensis Chinese medicinal cockroach
- Euryale ferox Prickly waterlily
- Eurycoma harmandiana
- Eurycoma longifolia
- Eutrema japonicum Japanese Horseradish
- Evolvulus alsinoides Slender Dwarf Morningglory
- Evolvulus glomeratus Brazilian Dwarf Morning-Glory
- Excoecaria