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Lyre-leaf Sage
Lyre-leaf Sage
(Salvia lyrata)
Dune Sandbur
Dune Sandbur
(Cenchrus tribuloides)
Salt Marsh Sandspurry
Salt Marsh Sandspurry
(Spergularia salina)
Pine Barren Sandwort
Pine Barren Sandwort
(Minuartia caroliniana)
Wild Sarsaparilla
Wild Sarsaparilla
(Aralia nudicaulis)
Sassafras
Sassafras
(Sassafras albidum)
Virginia Saxifrage
Virginia Saxifrage
(Micranthes virginiensis)
Screw-stem
Screw-stem
(Bartonia paniculata subsp. paniculata)
Yellow Screwstem
Yellow Screwstem
(Bartonia virginica)
Sea-lavender
Sea-lavender
(Limonium carolinianum)
American Sea-rocket
American Sea-rocket
(Cakile edentula)
Golden Seal
Golden Seal
(Hydrastis canadensis)
Asymmetrical Fringed Sedge
Asymmetrical Fringed Sedge
(Carex crinita var. crinita)
Bladder Sedge
Bladder Sedge
(Carex intumescens)
Bushy Seedbox
Bushy Seedbox
(Ludwigia alternifolia)
Creeping Water Primrose Seedbox
Creeping Water Primrose Seedbox
(Ludwigia peploides subsp. glabrescens)
Globe-fruited Seedbox
Globe-fruited Seedbox
(Ludwigia sphaerocarpa)
Herbaceous Seepweed
Herbaceous Seepweed
(Suaeda maritima)
Native Self-heal
Native Self-heal
(Prunella vulgaris var. lanceolata)
Wild Senna
Wild Senna
(Senna hebecarpa)
Shadbush
Shadbush
(Amelanchier canadensis var. canadensis)
Downy Shadbush
Downy Shadbush
(Amelanchier arborea)
Shepherd's-cress
Shepherd's-cress
(Teesdalia nudicaulis)
Elliptic Shinleaf
Elliptic Shinleaf
(Pyrola elliptica)
Skeletonweed
Skeletonweed
(Chondrilla juncea)
Hairy Skullcap
Hairy Skullcap
(Scutellaria elliptica var. elliptica)
Hyssop Skullcap
Hyssop Skullcap
(Scutellaria integrifolia)
Mad-dog Skullcap
Mad-dog Skullcap
(Scutellaria lateriflora)
Dock-leaf Smartweed
Dock-leaf Smartweed
(Persicaria lapathifolia)
Dotted Smartweed
Dotted Smartweed
(Persicaria punctata)
Lady's Thumb Smartweed
Lady's Thumb Smartweed
(Persicaria maculosa)
Longbristle Smartweed
Longbristle Smartweed
(Persicaria longiseta)
Marshpepper Smartweed
Marshpepper Smartweed
(Persicaria hydropiper)
Pennsylvania Smartweed
Pennsylvania Smartweed
(Persicaria pensylvanica)
Prince's-plume Smartweed
Prince's-plume Smartweed
(Persicaria orientalis)
Virginia Smartweed
Virginia Smartweed
(Persicaria virginiana)
Clustered Black Snakeroot
Clustered Black Snakeroot
(Sanicula odorata)
Lesser Snakeroot
Lesser Snakeroot
(Ageratina aromatica)
Virginia Snakeroot
Virginia Snakeroot
(Endodeca serpentaria)
White Snakeroot
White Snakeroot
(Ageratina altissima var. altissima)
White Snakeroot
White Snakeroot
(Ageratina altissima var. altissima)
Dwarf Snapdragon
Dwarf Snapdragon
(Chaenorhinum minus)
Autumn Sneezeweed
Autumn Sneezeweed
(Helenium autumnale)
Purple-head Sneezeweed
Purple-head Sneezeweed
(Helenium flexuosum)
Japanese Snowball
Japanese Snowball
(Viburnum plicatum)
Snowdrops
Snowdrops
(Galanthus nivalis)
Summer Snowflake
Summer Snowflake
(Leucojum aestivum)
Solomon's-seal
Solomon's-seal
(Polygonatum biflorum var. biflorum)
Downy Solomon's-seal
Downy Solomon's-seal
(Polygonatum pubescens)
Giant Solomon's-seal
Giant Solomon's-seal
(Polygonatum biflorum var. commutatum)
Delectable Sowthistle
Delectable Sowthistle
(Sonchus oleraceus)
Spiny-leaf Sowthistle
Spiny-leaf Sowthistle
(Sonchus asper)
Spanish Needles
Spanish Needles
(Bidens bipinnata)
Spatterdock
Spatterdock
(Nuphar advena)
Spearmint
Spearmint
(Mentha spicata)
Spearscale
Spearscale
(Atriplex prostrata)
Speedwell
Speedwell
(Veronica polita)
Bird-eye Speedwell
Bird-eye Speedwell
(Veronica persica)
Common Speedwell
Common Speedwell
(Veronica officinalis)
Corn Speedwell
Corn Speedwell
(Veronica arvensis)
Ivyleaf Speedwell
Ivyleaf Speedwell
(Veronica hederifolia)
Perscians' Speedwell
Perscians' Speedwell
(Veronica persica)
Thyme-leaved Speedwell
Thyme-leaved Speedwell
(Veronica serpyllifolia)
Water Speedwell
Water Speedwell
(Veronica anagallis-aquatica)
Smooth Spicebush
Smooth Spicebush
(Lindera benzoin var. benzoin)
Spiderflower
Spiderflower
(Tarenaya hassleriana)
Virginia Spiderwort
Virginia Spiderwort
(Tradescantia virginiana)
Virginia Spiderwort
Virginia Spiderwort
(Tradescantia virginiana)
Broad Spikegrass
Broad Spikegrass
(Chasmanthium latifolium)
American Spikenard
American Spikenard
(Aralia racemosa)
Slender Spikerush
Slender Spikerush
(Eleocharis tenuis var. tenuis)
Broad-leaf White Spiraea
Broad-leaf White Spiraea
(Spiraea alba var. latifolia)
Japanese Spiraea
Japanese Spiraea
(Spiraea japonica)
Narrowleaf Springbeauty
Narrowleaf Springbeauty
(Claytonia virginica var. virginica)
Narrowleaf Springbeauty
Narrowleaf Springbeauty
(Claytonia virginica var. virginica)
Cypress Spurge
Cypress Spurge
(Euphorbia cyparissias)
Eyebane Spurge
Eyebane Spurge
(Euphorbia nutans)
Flowering Spurge
Flowering Spurge
(Euphorbia corollata)
Spotted Spurge
Spotted Spurge
(Euphorbia maculata)
Variable-leaf Spurge
Variable-leaf Spurge
(Euphorbia ipecacuanhae)
Alien St. Johnswort
Alien St. Johnswort
(Hypericum perforatum)
Canadian St. Johnswort
Canadian St. Johnswort
(Hypericum canadense)
Dotted St. Johnswort
Dotted St. Johnswort
(Hypericum punctatum)
Marsh St. Johnswort
Marsh St. Johnswort
(Hypericum virginicum)
Orange-grass St. Johnswort
Orange-grass St. Johnswort
(Hypericum gentianoides)
Shrubby St. Johnswort
Shrubby St. Johnswort
(Hypericum prolificum)
Slender St. Johnswort
Slender St. Johnswort
(Hypericum mutilum var. mutilum)
Star-of-bethlehem
Star-of-bethlehem
(Ornithogalum umbellatum)
Eastern Yellow Stargrass
Eastern Yellow Stargrass
(Hypoxis hirsuta)
Longleaf Starwort
Longleaf Starwort
(Stellaria longifolia)
Medium Starwort
Medium Starwort
(Stellaria media)
Virginia Stickseed
Virginia Stickseed
(Hackelia virginiana)
Stickywilly
Stickywilly
(Galium aparine)
Ditch Stonecrop
Ditch Stonecrop
(Penthorum sedoides)
Woodland Stonecrop
Woodland Stonecrop
(Sedum ternatum)
Indian Strawberry
Indian Strawberry
(Potentilla indica)
Virginia Strawberry
Virginia Strawberry
(Fragaria virginiana)
American Strawberry-bush
American Strawberry-bush
(Euonymus americanus)
Smooth Sumac
Smooth Sumac
(Rhus glabra)
Winged Sumac
Winged Sumac
(Rhus copallinum)
Spoon-leaved Sundew
Spoon-leaved Sundew
(Drosera intermedia)
Small Sundrops
Small Sundrops
(Oenothera perennis)
Domesticated Sunflower
Domesticated Sunflower
(Helianthus annuus)
Swamp Sunflower
Swamp Sunflower
(Helianthus angustifolius)
Tall Sunflower
Tall Sunflower
(Helianthus giganteus)
Thinleaf Sunflower
Thinleaf Sunflower
(Helianthus decapetalus)
Tick-seed Sunflower
Tick-seed Sunflower
(Bidens polylepis)
Woodland Sunflower
Woodland Sunflower
(Helianthus divaricatus)
Swamp Candles
Swamp Candles
(Lysimachia terrestris)
Swamp-pink
Swamp-pink
(Helonias bullata)
Sweet Betsy
Sweet Betsy
(Trillium cuneatum)
Sweet-breath-of-spring
Sweet-breath-of-spring
(Lonicera fragrantissima)
Bland Sweet-cicely
Bland Sweet-cicely
(Osmorhiza claytonii)
Scented Sweet-cicely
Scented Sweet-cicely
(Osmorhiza longistylis)
Sweet-gum
Sweet-gum
(Liquidambar styraciflua)
Sweet-william
Sweet-william
(Dianthus barbatus)
White Sweetclover
White Sweetclover
(Melilotus albus)
Yellow Sweetclover
Yellow Sweetclover
(Melilotus officinalis)
European Sweetflag
European Sweetflag
(Acorus calamus)
Sycamore
Sycamore
(Platanus occidentalis)