E
- Echinacea purpurea (N)
- Echinochloa crus-galli (I)
- Echinochloa frumentacea (I)
- Echinochloa muricata var. microstachya (N)
- Echinochloa muricata var. muricata (N)
- Echinochloa walteri (N)
- Echinocystis lobata (N)
- Echinodorus berteroi (N)
- Echium vulgare (I)
- Eclipta prostrata (N)
- Egeria densa (I)
- Elaeagnus angustifolia (I)
- Elaeagnus multiflora (I)
- Elaeagnus umbellata var. parvifolia (I)
- Elatine brachysperma (N)
- Eleocharis acicularis var. acicularis (N)
- Eleocharis compressa var. compressa (N)
- Eleocharis elliptica (N)
- Eleocharis engelmannii (N)
- Eleocharis erythropoda (N)
- Eleocharis geniculata (N)
- Eleocharis intermedia (N)
- Eleocharis obtusa (N)
- Eleocharis olivacea var. olivacea (N)
- Eleocharis ovata (N)
- Eleocharis palustris var. palustris (N)
- Eleocharis parvula (N)
- Eleocharis quadrangulata (N)
- Eleocharis quinqueflora (N)
- Eleocharis rostellata (N)
- Eleocharis tenuis var. tenuis (N)
- Eleocharis tenuis var. verrucosa (N)
- Eleocharis wolfii (N)
- Elephantopus carolinianus (N)
- Eleusine indica (I)
- Ellisia nyctelea (N)
- Elodea canadensis (N)
- Elodea nuttallii (N)
- Elymus canadensis (N)
- Elymus hystrix var. bigeloviana (N)
- Elymus hystrix var. hystrix (N)
- Elymus repens (I)
- Elymus riparius (N)
- Elymus submuticus (N)
- Elymus trachycaulus ssp. subsecundus (N)
- Elymus trachycaulus ssp. trachycaulus (N)
- Elymus villosus (N)
- Elymus virginicus var. virginicus (N)
- Enemion biternatum (N)
- Epifagus virginiana (N)
- Epigaea repens (N)
- Epilobium ciliatum ssp. ciliatum (N)
- Epilobium ciliatum ssp. glandulosum (N)
- Epilobium coloratum (N)
- Epilobium hirsutum (I)
- Epilobium leptophyllum (N)
- Epilobium parviflorum (I)
- Epilobium strictum (N)
- Epilobium × wisconsinense (N)
- Epipactis helleborine (I)
- Equisetum arvense (N)
- Equisetum × ferrissii (N)
- Equisetum fluviatile (N)
- Equisetum hyemale var. affine (N)
- Equisetum laevigatum (N)
- Equisetum × mackaii (N)
- Equisetum × nelsonii (N)
- Equisetum sylvaticum (N)
- Equisetum variegatum var. variegatum (N)
- Eragrostis capillaris (N)
- Eragrostis cilianensis (I)
- Eragrostis curvula (I)
- Eragrostis frankii (N)
- Eragrostis hirsuta (N)
- Eragrostis hypnoides (N)
- Eragrostis minor (I)
- Eragrostis pectinacea var. miserrima (N)
- Eragrostis pectinacea var. pectinacea (N)
- Eragrostis pilosa (N)
- Eragrostis spectabilis (N)
- Eragrostis trichodes (N)
- Eranthis hyemalis (I)
- Erechtites hieraciifolia var. hieraciifolia (N)
- Erica tetralix (I)
- Erigenia bulbosa (N)
- Erigeron annuus (N)
- Erigeron philadelphicus var. philadelphicus (N)
- Erigeron pulchellus var. brauniae (N)
- Erigeron pulchellus var. pulchellus (N)
- Erigeron strigosus var. strigosus (N)
- Eriocaulon aquaticum (N)
- Eriochloa contracta (N)
- Eriophorum gracile var. gracile (N)
- Eriophorum virginicum (N)
- Eriophorum viridicarinatum (N)
- Erodium cicutarium ssp. cicutarium (I)
- Erucastrum gallicum (I)
- Eryngium yuccifolium var. yuccifolium (N)
- Erysimum capitatum var. capitatum (N)
- Erysimum cheiranthoides (I)
- Erysimum inconspicuum var. inconspicuum (N)
- Erysimum repandum (I)
- Erythronium albidum (N)
- Erythronium americanum ssp. americanum (N)
- Erythronium rostratum (N)
- Eschscholzia californica ssp. californica (N)
- Eubotrys recurva (N)
- Euonymus alatus var. alatus (I)
- Euonymus americanus (N)
- Euonymus atropurpureus var. atropurpureus (N)
- Euonymus europaeus (I)
- Euonymus fortunei var. radicans (I)
- Euonymus obovatus (N)
- Eupatoriadelphus fistulosus (N)
- Eupatoriadelphus maculatus var. maculatus (N)
- Eupatorium album var. album (N)
- Eupatorium altissimum (N)
- Eupatorium godfreyanum (N) (a hybrid of Eupatorium rotundifolium and Eupatorium sessilifolium)
- Eupatorium hyssopifolium var. laciniatum (N)
- Eupatorium perfoliatum var. perfoliatum (N)
- Eupatorium purpureum var. purpureum (N)
- Eupatorium rotundifolium var. ovatum (N)
- Eupatorium rotundifolium var. rotundifolium (N)
- Eupatorium serotinum (N)
- Eupatorium sessilifolium var. sessilifolium (N)
- Euphorbia commutata (N)
- Euphorbia corollata (N)
- Euphorbia cyathophora (N)
- Euphorbia cyparissias (I)
- Euphorbia davidii (I)
- Euphorbia dentata (I)
- Euphorbia dentata var. dentata (N)
- Euphorbia esula var. esula (I)
- Euphorbia falcata (I)
- Euphorbia helioscopia (I)
- Euphorbia lathyris (I)
- Euphorbia marginata (N)
- Euphorbia peplus (I)
- Euphorbia platyphyllos (I)
- Euphorbia purpurea (N)
- Euphorbia spathulata (N)
- Eurybia divaricata (N)
- Eurybia macrophylla (N)
- Eurybia schreberi (N)
- Eurybia surculosa (N)
- Euthamia graminifolia var. graminifolia (N)
- Euthamia gymnospermoides (N)
Read more about this topic: Flora Of Ohio