Plants (and a few non-plants) with photos from the park on this site. Not a complete list of the plants that can be found there.
Velvet-leaf
(Abutilon theophrasti)
Red Maple
(Acer rubrum var. rubrum)
Red Maple
(Acer rubrum var. trilobum)
Yarrow
(Achillea millefolium)
European Sweetflag
(Acorus calamus)
Maidenhair-fern
(Adiantum pedatum)
Uncommon
White Snakeroot
(Ageratina altissima var. altissima)
Swamp Agrimony
(Agrimonia parviflora)
Downy Agrimony
(Agrimonia pubescens)
Uncommon
Carpet Bugleweed
(Ajuga reptans)
Broadleaf Water-plantain
(Alisma subcordatum)
Garlic Mustard
(Alliaria petiolata)
Giant Ragweed
(Ambrosia trifida)
Porcelain-berry
(Ampelopsis glandulosa)
Hairy American Hog-peanut
(Amphicarpaea bracteata var. comosa)
Roundlobed Hepatica
(Anemone americana)
Uncommon
Virginia Anemone
(Anemone virginiana var. virginiana)
Poodle Moss
(Anomodon attenuatus)
Pointed Little-leaf Pussytoes
(Antennaria neglecta)
Hairy Big-leaf Pussytoes
(Antennaria parlinii subsp. fallax)
Puttyroot
(Aplectrum hyemale)
Rare
Wall-cress
(Arabidopsis thaliana)
Wild Sarsaparilla
(Aralia nudicaulis)
American Spikenard
(Aralia racemosa)
Uncommon
Small Jack-in-the-pulpit
(Arisaema triphyllum subsp. pusillum)
Swamp Jack-in-the-pulpit
(Arisaema triphyllum subsp. triphyllum)
Sagebrush Wormwood
(Artemisia ludoviciana)
Mugwort
(Artemisia vulgaris)
Canada Wild-ginger
(Asarum canadense var. canadense)
Swamp Milkweed
(Asclepias incarnata subsp. pulchra)
Common Milkweed
(Asclepias syriaca)
Butterfly Milkweed
(Asclepias tuberosa var. tuberosa)
Ebony Spleenwort
(Asplenium platyneuron)
Japanese Barberry
(Berberis thunbergii)
Nodding Tick-seed
(Bidens cernua)
False Nettle
(Boehmeria cylindrica)
Rattlesnake Fern
(Botrypus virginianus)
Butterfly-bush
(Buddleja davidii)
Large Water-starwort
(Callitriche heterophylla)
Marsh Bellflower
(Campanula aparinoides)
Rare
Cutleaf Toothwort
(Cardamine concatenata)
Touch-me-not Bittercress
(Cardamine impatiens)
Pennsylvania Bittercress
(Cardamine pensylvanica)
Musk Thistle
(Carduus nutans)
Bitternut Hickory
(Carya cordiformis)
Blue Cohosh
(Caulophyllum thalictroides)
Uncommon
Oriental Bittersweet
(Celastrus orbiculatus)
Branching Centaury-plant
(Centaurium pulchellum)
Buttonbush
(Cephalanthus occidentalis)
Mouse-ear Chickweed
(Cerastium fontanum)
Partridge Pea
(Chamaecrista fasciculata var. fasciculata)
Broad Spikegrass
(Chasmanthium latifolium)
Greater Celandine
(Chelidonium majus)
White Turtlehead
(Chelone glabra)
Spotted Wintergreen
(Chimaphila maculata)
Glory-of-the-snow
(Chionodoxa sp.)
Chicory
(Cichorium intybus)
Southern Broadleaf Enchanter's Nightshade
(Circaea canadensis subsp. canadensis)
Canada Thistle
(Cirsium arvense)
Field Thistle
(Cirsium discolor)
Bull Thistle
(Cirsium vulgare)
Narrowleaf Springbeauty
(Claytonia virginica var. virginica)
Virginia Virgin-bower
(Clematis virginiana)
Field Basil
(Clinopodium vulgare)
Canada Horse-balm
(Collinsonia canadensis)
Light-blue Asiatic Dayflower
(Commelina communis var. communis)
Poison-hemlock
(Conium maculatum)
Scented Liverwort
(Conocephalum conicum)
Rare
Flowering Dogwood
(Cornus florida)
Yellow Corydalis
(Corydalis flavula)
Canada Honewort
(Cryptotaenia canadensis)
Gronovius's Dodder
(Cuscuta gronovii)
Wild Comfrey
(Cynoglossum virginianum var. virginianum)
Uncommon
Rusty Flatsedge
(Cyperus odoratus var. odoratus)
Jimsonweed
(Datura stramonium)
Wild Carrot
(Daucus carota)
Hay-scented Fern
(Dennstaedtia punctilobula)
Silvery False Spleenwort
(Deparia acrostichoides)
Dillen's Tick-trefoil
(Desmodium glabellum)
Uncommon
Panicled-leaf Tick-trefoil
(Desmodium paniculatum var. paniculatum)
Deptford-pink
(Dianthus armeria)
Dutchman's Breeches
(Dicentra cucullaria)
Uncommon
Windswept Broom Moss
(Dicranum scoparium)
Persimmon
(Diospyros virginiana)
Marginal Wood-fern
(Dryopteris marginalis)
Uncommon
Wild Mock-cucumber
(Echinocystis lobata)
Autumn Olive
(Elaeagnus umbellata)
River Wild Rye
(Elymus riparius)
Uncommon
Beechdrops
(Epifagus virginiana)
Purple-leaf Willowherb
(Epilobium coloratum)
Broad-leaved Helleborine
(Epipactis helleborine)
Field Horsetail
(Equisetum arvense)
Philadelphia Fleabane
(Erigeron philadelphicus)
Yellow Trout-lily
(Erythronium americanum subsp. americanum)
Winged Euonymus
(Euonymus alatus)
Cypress Spurge
(Euphorbia cyparissias)
Eyebane Spurge
(Euphorbia nutans)
White Wood Aster
(Eurybia divaricata)
Schreber's Aster
(Eurybia schreberi)
Rare
Hollow-stem Joe-pye-weed
(Eutrochium fistulosum)
American Beech
(Fagus grandifolia)
Lesser Celandine
(Ficaria verna)
Virginia Strawberry
(Fragaria virginiana)
Fire-wheel Blanket-flower
(Gaillardia pulchella var. pulchella)
Showy Orchis
(Galearis spectabilis)
Uncommon
Catchweed Bedstraw
(Galium aparine)
Southern Forest Bedstraw
(Galium circaezans var. circaezans)
Madder Bedstraw
(Galium mollugo)
Yellow Spring Bedstraw
(Galium verum)
Carolina Crane's-bill
(Geranium carolinianum)
Wild Geranium
(Geranium maculatum)
White Avens
(Geum canadense)
Spring Avens
(Geum vernum)
Ground-ivy
(Glechoma hederacea)
Honey-locust
(Gleditsia triacanthos)
Virginia Stickseed
(Hackelia virginiana)
American Witch-hazel
(Hamamelis virginiana var. virginiana)
Domesticated Sunflower
(Helianthus annuus)
Thinleaf Sunflower
(Helianthus decapetalus)
Uncommon
Jerusalem Artichoke
(Helianthus tuberosus)
Orange Daylily
(Hemerocallis fulva)
Dame's Rocket
(Hesperis matronalis)
Kidneyleaf Mud-plantain
(Heteranthera reniformis)
American Alumroot
(Heuchera americana)
Uncommon
Flower-of-an-hour
(Hibiscus trionum)
Hawkweed
(Hieracium flagellare)
Panicled Hawkweed
(Hieracium paniculatum)
Rattlesnake Hawkweed
(Hieracium venosum)
Japanese Hops
(Humulus japonicus)
Eastern Waterleaf
(Hydrophyllum virginianum)
Uncommon
Fountain Feather Moss
(Hygroamblystegium tenax)
Bare-stemmed Tick-trefoil
(Hylodesmum nudiflorum)
Slender St. Johnswort
(Hypericum mutilum var. mutilum)
Dotted St. Johnswort
(Hypericum punctatum)
Red Pinesap
(Hypopitys lanuginosa)
Spotted Jewel-weed
(Impatiens capensis)
Pale Jewel-weed
(Impatiens pallida)
Uncommon
Large Whorled Pogonia
(Isotria verticillata)
Uncommon
Mountain Laurel
(Kalmia latifolia)
Canada Lettuce
(Lactuca canadensis)
Canada Wood-nettle
(Laportea canadensis)
Broadleaf Peavine
(Lathyrus latifolius)
Poor-man's Pepper-grass
(Lepidium virginicum subsp. virginicum)
Oxeye Daisy
(Leucanthemum vulgare)
White Moss
(Leucobryum albidum)
European Privet
(Ligustrum vulgare)
Smooth Spicebush
(Lindera benzoin var. benzoin)
Sweet-gum
(Liquidambar styraciflua)
Tuliptree
(Liriodendron tulipifera)
Cardinal-flower
(Lobelia cardinalis)
Great Blue Lobelia
(Lobelia siphilitica)
Japanese Honeysuckle
(Lonicera japonica)
Amur Honeysuckle
(Lonicera maackii)
Birds-foot Trefoil
(Lotus corniculatus)
Bushy Seedbox
(Ludwigia alternifolia)
Hedgehog Woodrush
(Luzula echinata)
Meadow Spikemoss
(Lycopodioides apodum)
Uncommon
Virginia Bugleweed
(Lycopus virginicus)
Creeping Loosestrife
(Lysimachia nummularia)
Whorled Loosestrife
(Lysimachia quadrifolia)
Leatherleaf Mahonia
(Mahonia bealei)
Canada Mayflower
(Maianthemum canadense)
Indian Cucumber-root
(Medeola virginiana)
Black Medic
(Medicago lupulina)
Canada Moonseed
(Menispermum canadense)
Field Mint
(Mentha arvensis)
Virginia Bluebells
(Mertensia virginica)
Uncommon
Virginia Saxifrage
(Micranthes virginiensis)
Uncommon
Japanese Stilt Grass
(Microstegium vimineum)
Square-stem Monkeyflower
(Mimulus ringens)
Partridge-berry
(Mitchella repens)
Two-leaf Bishop's-cap
(Mitella diphylla)
Rare
Oswego-tea Beebalm
(Monarda didyma)
Indian-pipe
(Monotropa uniflora)
White Mulberry
(Morus alba)
Grape-hyacinth
(Muscari neglectum)
Small Forget-me-not
(Myosotis laxa subsp. laxa)
Uncommon
Large-seed Forget-me-not
(Myosotis macrosperma)
Rare
True Forget-me-not
(Myosotis scorpioides)
Giant-chickweed
(Myosoton aquaticum)
Tall Rattlesnake-root
(Nabalus altissimus)
Daffodil
(Narcissus pseudonarcissus)
Watercress
(Nasturtium officinale)
American Lotus
(Nelumbo lutea)
Catnip
(Nepeta cataria)
Spatterdock
(Nuphar advena)
Virginia Pennywort
(Obolaria virginica)
Uncommon
Small Flowered Evening-primrose
(Oenothera parviflora)
Perennial Evening-primrose
(Oenothera perennis)
Star-of-bethlehem
(Ornithogalum umbellatum)
Bland Sweet-cicely
(Osmorhiza claytonii)
Scented Sweet-cicely
(Osmorhiza longistylis)
Cinnamon Fern
(Osmundastrum cinnamomeum var. cinnamomeum)
Upright Yellow Woodsorrel
(Oxalis stricta)
Violet Woodsorrel
(Oxalis violacea)
Pachysandra
(Pachysandra terminalis)
Golden Ragwort
(Packera aurea)
Dwarf Ginseng
(Panax trifolius)
New York Fern
(Parathelypteris noveboracensis)
Virginia Creeper
(Parthenocissus quinquefolia)
Royal Paulownia
(Paulownia tomentosa)
Tall White Beardtongue
(Penstemon digitalis)
Ditch Stonecrop
(Penthorum sedoides)
Beefsteak Plant
(Perilla frutescens)
Triangle-leaf Tearthumb
(Persicaria arifolia)
Marshpepper Smartweed
(Persicaria hydropiper)
Dock-leaf Smartweed
(Persicaria lapathifolia)
Longbristle Smartweed
(Persicaria longiseta)
Lady's Thumb Smartweed
(Persicaria maculosa)
Pennsylvania Smartweed
(Persicaria pensylvanica)
Mile-a-minute
(Persicaria perfoliata)
Dotted Smartweed
(Persicaria punctata)
Arrowleaf Tearthumb
(Persicaria sagittata)
Virginia Smartweed
(Persicaria virginiana)
Fall Phlox
(Phlox paniculata)
Lopseed
(Phryma leptostachya var. leptostachya)
Pokeweed
(Phytolacca americana)
Loblolly Pine
(Pinus taeda)
Baby Tooth Moss
(Plagiomnium cuspidatum)
Nipple-seed Plantain
(Plantago major)
Virginia Plantain
(Plantago virginica)
Green-fringe Orchis
(Platanthera lacera)
Uncommon
Purple Fringeless Orchid
(Platanthera peramoena)
Rare
Mayapple
(Podophyllum peltatum)
Greek Valerian
(Polemonium reptans var. reptans)
Uncommon
Solomon's-seal
(Polygonatum biflorum var. biflorum)
Giant Solomon's-seal
(Polygonatum biflorum var. commutatum)
Uncommon
Downy Solomon's-seal
(Polygonatum pubescens)
Virginia Polypody
(Polypodium virginianum)
Uncommon
Christmas Fern
(Polystichum acrostichoides)
Simple Cinquefoil
(Potentilla simplex)
Native Self-heal
(Prunella vulgaris var. lanceolata)
Sweet Cherry
(Prunus avium)
Wild Black Cherry
(Prunus serotina var. serotina)
Elliptic Shinleaf
(Pyrola elliptica)
Rare
Hooked Buttercup
(Ranunculus recurvatus var. recurvatus)
Creeping Buttercup
(Ranunculus repens)
Cursed Buttercup
(Ranunculus sceleratus var. sceleratus)
Pinxterbloom Azalea
(Rhododendron periclymenoides)
Jetbead
(Rhodotypos scandens)
Multiflora Rose
(Rosa multiflora)
Allegheny Blackberry
(Rubus allegheniensis)
Yankee Blackberry
(Rubus flagellaris)
Black Raspberry
(Rubus occidentalis)
Three-leaf Blackberry
(Rubus parvifolius)
Wineberry
(Rubus phoenicolasius)
Black-eyed Susan
(Rudbeckia hirta var. pulcherrima)
Curly Dock
(Rumex crispus)
Longbeak Arrowhead
(Sagittaria australis)
Elderberry
(Sambucus canadensis)
Bloodroot
(Sanguinaria canadensis)
Clustered Black Snakeroot
(Sanicula odorata)
Bouncing-bet
(Saponaria officinalis)
Sassafras
(Sassafras albidum)
Kentucky Fescue
(Schedonorus arundinaceus)
Softstem Bulrush
(Schoenoplectus tabernaemontani)
Woolgrass Bulrush
(Scirpus cyperinus)
Georgia Bulrush
(Scirpus georgianus)
Leafy Bulrush
(Scirpus polyphyllus)
Carpenter's Square Figwort
(Scrophularia marilandica)
Hairy Skullcap
(Scutellaria elliptica var. elliptica)
Mad-dog Skullcap
(Scutellaria lateriflora)
Crown Vetch
(Securigera varia)
Woodland Stonecrop
(Sedum ternatum)
Rare
Nodding Foxtail
(Setaria faberi)
Tall Hedge-mustard
(Sisymbrium altissimum)
Hairy-pod Hedge-mustard
(Sisymbrium officinale)
Pointed Blue-eyed-grass
(Sisyrinchium angustifolium)
Smooth Carrion-flower Greenbrier
(Smilax herbacea)
Round-leaf Greenbrier
(Smilax rotundifolia)
Carolina Nightshade
(Solanum carolinense var. carolinense)
Bluestem Goldenrod
(Solidago caesia var. caesia)
Canada Goldenrod
(Solidago canadensis var. canadensis)
Broadleaf Goldenrod
(Solidago flexicaulis)
Roundleaf Goldenrod
(Solidago patula var. patula)
Uncommon
Thin Hairy Rough-leaf Goldenrod
(Solidago rugosa var. rugosa)
Spiny-leaf Sowthistle
(Sonchus asper)
Broad-leaf White Spiraea
(Spiraea alba var. latifolia)
Rare
Japanese Spiraea
(Spiraea japonica)
Longleaf Starwort
(Stellaria longifolia)
Heart-leaf Aster
(Symphyotrichum cordifolium)
Uncommon
Bristly Aster
(Symphyotrichum puniceum var. puniceum)
Skunk Cabbage
(Symplocarpus foetidus)
Spiderflower
(Tarenaya hassleriana)
American Germander
(Teucrium canadense var. virginicum)
Uncommon
Tall Meadowrue
(Thalictrum pubescens)
Rue Anemone
(Thalictrum thalictroides)
Roadside Penny-cress
(Thlaspi alliaceum)
Cranefly Orchid
(Tipularia discolor)
Poison Ivy
(Toxicodendron radicans var. radicans)
Meadow Goat's-beard
(Tragopogon dubius)
Meadow Goat's-beard
(Tragopogon pratensis)
Purple-top
(Tridens flavus)
Low Hop Clover
(Trifolium campestre)
Alsike Clover
(Trifolium hybridum)
Red Clover
(Trifolium pratense)
Nodding Trillium
(Trillium cernuum)
Rare
Broadleaf Cattail
(Typha latifolia)
American Elm
(Ulmus americana var. americana)
Stinging Nettle
(Urtica dioica)
Humped Bladderwort
(Utricularia gibba)
Uncommon
Perfoliate Bellwort
(Uvularia perfoliata)
Highbush Blueberry
(Vaccinium corymbosum)
European Cornsalad
(Valerianella locusta)
American False Hellebore
(Veratrum viride)
New York Ironweed
(Vernonia noveboracensis)
Water Speedwell
(Veronica anagallis-aquatica)
Common Speedwell
(Veronica officinalis)
Speedwell
(Veronica polita)
Mapleleaf Viburnum
(Viburnum acerifolium)
Exotic Arrow-wood
(Viburnum dilatatum)
Japanese Snowball
(Viburnum plicatum)
Smooth Blackhaw
(Viburnum prunifolium)
Narrowleaf Common Vetch
(Vicia sativa subsp. nigra)
Lentil Vetch
(Vicia tetrasperma)
Winter Vetch
(Vicia villosa)
Sweet White Violet
(Viola blanda)
Uncommon
Blue Marsh Violet
(Viola cucullata)
Blue American Dog Violet
(Viola labradorica)
Uncommon
Blue Palmate-leaved Violet
(Viola palmata)
Uncommon
Smooth Yellow Violet
(Viola pubescens var. scabriuscula)
Striped White Violet
(Viola striata)
Uncommon
Winter Grape
(Vitis vulpina)
Thunberg's Asiatic Hawk's-beard
(Youngia thunbergiana)
Eastern American Toad
(Anaxyrus americanus)
Great Blue Heron
(Ardea herodias)
Spotted Lanternfly
(Lycorma delicatula)
Garter snake
(Thamnophis sirtalis)
Bristly Beard Lichen
(Usnea hirta)
Delaware Wildflowers
