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| scientific name | common name(s) | image gallery |
| Dichanthelium clandestinum | Deer-tongue Deertongue | |
| Dichanthelium commutatum | Variable panicgrass | |
| Dicentra cucullaria | Dutchman's breeches | |
| Dicentra eximia | Turkey corn Fringed bleedinghearts Wild bleedingheart | |
| Distichlis spicata | Saltgrass Coastal salt grass Inland salt-grass | |
| Diospyros virginiana | Common persimmon Eastern persimmon | |
| Dodecatheon meadia | Pride-of-Ohio Roosterheads Shootingstar Pride of Ohio Eastern shooting star | |
| Doellingeria umbellata | Parasol whitetop Flat-topped White Aster | |
| Doellingeria umbellata var. umbellata | Flat-top aster Parasol whitetop | |
| Dryopteris carthusiana | Shield fern Spinulose wood fern Spinulose woodfern Toothed wood fern | |
| Dryopteris cristata | Crested woodfern Crested wood fern Buckler fern | |
| Dryopteris intermedia | Intermediate woodfern Evergreen wood-fern Fancy wood fern | |
| Dryopteris marginalis | Marginal woodfern Marginal fern Marginal shieldfern | |
| Dulichium arundinaceum | Threeway sedge Three-sided sedge | |
| Elymus canadensis | Canada wild rye Canadian wildrye Prairie wildrye Nodding wildrye | |
| Elymus hystrix | Eastern bottlebrush grass Bottlebrush Grass | |
| Elymus riparius | Riverbank wild-rye Riverbank wildrye | |
| Elymus virginicus | Virginia wildrye Virginia wild rye | |
| Erythronium americanum | Yellow trout-lily American trout-lily Dogtooth violet Eastern trout-lily | |
| Erigeron pulchellus | Robin's plantain Poor Robin's plantain Rose petty Robert's plantain Blue spring-daisy | |
| Eurybia divaricata | White wood aster | |
| Eupatoriadelphus dubius | Coastal plain joepyeweed Joe-Pye weed | |
| Eupatoriadelphus fistulosus | Trumpetweed Queen of the meadow Hollow Joe-pye weed Joe-pye weed | |
| Eupatorium hyssopifolium | Hyssop-leaf Boneset Hyssopleaf thoroughwort | |
| Eupatoriadelphus maculatus var. maculatus | Spotted trumpetweed Spotted joe-pye-weed | |
| Eupatorium perfoliatum | Common boneset | |
| Eutrochium purpureum | Purple joepyeweed Sweet-scented joepyeweed Sweet joepyeweed | |
| Eubotrys racemosa | Fetter-bush Leucothoe Swamp doghobble Sweet-bells Leucothe Sweetbells | |
| Fagus grandifolia | American beech | |
| Festuca rubra | Red fescue | |
| Fraxinus americana | White ash | |
| Fraxinus pennsylvanica | Green ash Red ash | |
| Gaylussacia baccata | Black huckleberry | |
| Gaylussacia frondosa | Blue huckleberry Dangleberry | |
| Gaultheria procumbens | Eastern teaberry Wintergreen Checkerberry | |
| Gentiana clausa | Bottle gentian Blind gentian | |
| Geranium maculatum | Spotted geranium Wild geranium Cranesbill | |
| Gillenia trifoliata | Bowman's root Indian physic | |
| Goodyera pubescens | Downy rattlesnake plantain | |
| Hamamelis virginiana | Witch hazel American witch hazel | |
| Heuchera americana | American alumroot | |
| Helianthus angustifolius | Swamp sunflower | |
| Helenium autumnale | Common sneezeweed Fall sneezeweed Autumn sneezeweed | |
| Helianthus decapetalus | Thinleaf sunflower Ten-petaled sunflower Thin-leaved sunflower Pale sunflower | |
| Helianthus divaricatus | Woodland sunflower Rough sunflower | |
| Heliopsis helianthoides | Smooth oxeye Oxeye sunflower False sunflower | |
| Heracleum maximum | Common cowparsnip Cow Parsnip | |
| Hepatica nobilis var. acuta | Sharplobe hepatica Sharp-lobed hepatica Mountain hepatica | |
| Hepatica nobilis var. obtusa | Roundlobe hepatica Round-lobed hepatica Liverleaf | |
| Heuchera villosa | Hairy alumroot | |
| scientific name | common name(s) | image gallery |