| E |
| Eccremocarpus scaber, Chilean glory flower; Glory vine |
| Echinacea paradoxa, Yellow coneflower |
| Echinacea purpurea, Purple coneflower |
| Echinops ritro, Globe thistle |
| Echium vulgare, Viper's bugloss; Blueweed |
| Ehretia acuminata, Kodo wood |
| Eichornia crassipes, Water hyacinth |
| Elaeagnus pungens 'Fruitlandii', Fruitland elaeagnus |
| Elaeagnus pungens, Thorny elaeagnus |
| Elaeagnus x ebbingii, Elaeagnus |
| Eleagnus angustifolia, Russian olive |
| Eleagnus angustifolia, Russian olive |
| Eleocharis montevidensis, Spike rush |
| Eleocharis quadrangulata, Square rush |
| Elymus arenarius (Leymus arenarius), Blue lyme grass |
| Elymus racemosa (Leymus racemosa), Giant blue wild rye |
| Enkianthus campanulatus, Redvien enkianthus |
| Epifagus virginiana, Beech-drops |
| Epigaea repens, Trailing arbutus |
| Epigaea repens, Trailing arbutus |
| Epigaea repens, Trailing arbutus |
| Epilobium angustifolium, Fireweed; Great willowherb |
| Epimedium sempervirens, Bishop's hat |
| Epimedium spp., Epimedium |
| Epimedium x perralchicum, Yellow epimedium |
| Epimedium x rubrum, Red epimedium; Red barrenwort |
| Epimedium x versicolor 'Sulphureum', Bicolor epimedium; Bicolor barrenwort |
| Epimedium x youngianum 'Niveum', White epimedium |
| Equisetum hyemale, Horsetail; Souring rush |
| Equisetum scorpoides, Dwarf Horsetail |
| Eragrostrum spectablis, Purple love grass; tumble grass |
| Eranthis hyemalis; E. cilicica, Winter aconite |
| Eremurus spp., Desert candle, Foxtail lily |
| Eremurus spp., Foxtail lily |
| Erianthus ravennae, Mvenra grass; Ravenna grass; Hardy pampas grass |
| Erigeron philadelphicus, Philadelphia fleabane; Daisy fleabane |
| Erigeron pulchellus, Robin-plantain |
| Erigeron spp., Daisy fleabane |
| Eriobotrya japonica, Loquat |
| Eriocaulon compressum, Pipewort; Hatpins |
| Eriophorum angustifolium, Cotton grass |
| Eriophorum latifolia, Broad-leaved cotton grass |
| Eriophorum virginicum, Cotton grass |
| Eryngium aquaticum, Rattlesnake master |
| Eryngium spp., Sea holly |
| Erysimum linifolium, Alpine wallflower |
| Erythronium 'Pagoda', Avalanche lily; Fawn lily; Glacier lily; Trout lily |
| Erythronium americanum, Trout lily; Fawn lily; Dog-tooth violet |
| Escallonia rubra, Escallonia |
| Eschscholzia californica, California poppy |
| Eucalyptus cinerea, Eucalyptus |
| Eucalyptus spp., Eucalyptus |
| Eucharis, Amazon lily |
| Eucomis, Pineapple lily; King's flower |
| Eucommia ulmoides, Hardy rubber tree |
| Eucrosia |
| Euonymus alatus 'Compactus', Compact winged euonymus |
| Euonymus alatus, Winged euonymus |
| Euonymus americanus, Strawberry bush; Hearts a'busting |
| Euonymus americanus, Strawberry bush; Hearts a'busting |
| Euonymus bungeanus, Winterberry euonymus |
| Euonymus europaeus, European euonymus |
| Euonymus fortunei 'Colorata' = E. fortunei var. colorata, Purpleleaf wintercreeper |
| Euonymus fortunei 'Emerald Gaiety', Emerald Gaiety euonymus |
| Euonymus fortunei 'Silver Queen', Silver Queen euonymus |
| Euonymus fortunei var. radicans, Common wintercreeper |
| Euonymus fortunei var. radicans, Wintercreeper; Euonymus |
| Euonymus fortunei, Wintercreeper euonymus |
| Euonymus fortunei, Wintercreeper euonymus; Japanese euonymus |
| Euonymus hamiltonianus, Yeddo euonymus |
| Euonymus japonicus, Japanese euonymus |
| Euonymus kiautschovicus, Spreading euonymus |
| Eupatorium coelestinum, Hardy ageratum |
| Eupatorium coelestium, Hardy ageratum; Mistflower; Wild ageratum |
| Eupatorium hyssopifolium, Hyssop-leaved thoroughwort; Hyssop-leaved bonset |
| Eupatorium maculatum, Joe-pye-weed; Queen of the meadow |
| Eupatorium perfoliatum, Bonset |
| Eupatorium rugosum, White snakeroot |
| Euphorbia corrllata, Flowering spurge |
| Euphorbia cyparissias, Cypress spurge |
| Euphorbia esula, Leafy spurge |
| Euphorbia marginata, Snow-on-the-mountain |
| Euphorbia marginata, Snow-on-the-mountain |
| Euphorbia myrsinites, Myrtle euphorbia |
| Euphorbia polychroma, Cushion spurge; Cushion euphorbia |
| Euphorbia robbiae, Robb's euphorbia |
| Euphorbia spp., Spurge |
| Euptellea polyvandra, Euptellea |
| Euryale ferox, Gorgon plant |
| Euryale ferox, Prickly water lily; Gorgon plant |
| Euscaphis japonica, Korean sweetheart tree |
| Eustoma grandiflorum, Lisianthus |
| Evodia damiellii, Koran evodia |
| Evolvulus glomeratus, Blue daze |
| Exochorda giraldii, Redbud pearlbush |
| Exochorda racemosa, Common pearlbush |
| Exochorda x macrantha 'The Bride', The Bride pearlbush |