Sambucus nigra

Sambucus nigra

Black Elderberry, Common Elder, European Elder

Sanguinaria canadensis

Sanguinaria canadensis

Bloodroot

Sapium sebiferum

Sapium sebiferum

Chinese Tallow

Saponaria officinalis

Saponaria officinalis

Bouncing Bet, Bouncingbet, Soapwort

Satureja hortensis

Satureja hortensis

Summer Savory

Scabiosa ochroleuca

Scabiosa ochroleuca

Cream Pincushions, Cream Scabious

Schisandra chinensis

Schisandra chinensis

Chinese Magnolia Vine, Chinese Magnolia-vine, Five Flavor Fruit

Schisandra sphenanthera

Schisandra sphenanthera

nan wu wei zi, Southern Magnolia Vine

Schizachyrium scoparium

Schizachyrium scoparium

Beard Grass, Little Bluestem, Little Bluestem Broomsedge

Securinega suffruticosa

Securinega suffruticosa

Securinega

Senna hebecarpa

Senna hebecarpa

American Senna

Senna marilandica

Senna marilandica

Maryland Senna, Wild Senna

Senna roemeriana

Senna roemeriana

Twin-leaf Senna, Twoleaf Senna

Senna siamea

Senna siamea

Kassod Tree, Siamese Cassia

Sequoia sempervirens

Sequoia sempervirens

California Redwood, Coast Redwood, Redwood

Serenoa repens

Serenoa repens Silver

var. Silver

Silver Saw Palmetto

Sesbania grandiflora

Sesbania grandiflora

Agati, Vegetable Hummingbird

Silybum marianum

Silybum marianum

Blessed Milkthistle, Holy Thistle, Mary Thistle, Milk Thistle

Smallanthus uvedalius

Smallanthus uvedalius

Bear's Foot, Hairy Leafcup

Solanum dulcamara

Solanum dulcamara

Bittersweet Nightshade, Climbing Nightshade, Deadly Nightshade, Nightshade

Sorbus decora

Sorbus decora

Northern Mountain Ash, Showy Mountain Ash

Sorbus pohuashanensis

Sorbus pohuashanensis

Amur Mountain Ash

Sorbus sitchensis

Sorbus sitchensis

Sitka Mountain Ash, Western Mountain Ash

Sorbus torminalis

Sorbus torminalis

Checkertree, Chequer Tree

Sorghastrum nutans

Sorghastrum nutans var. Holt

var. Holt

Indiangrass, Yellow Indiangrass

Spartium junceum

Spartium junceum

Spanish Broom

Stewartia monadelpha

Stewartia monadelpha

Tall Stewartia

Stewartia pseudocamellia

Stewartia pseudocamellia var. koreana

var. koreana

Korean Stewartia, Stewartia

Stewartia rostrata

Stewartia rostrata

Beaked Stewartia, Chinese Stewartia, Upright Stewartia

Succisa pratensis

Succisa pratensis

Devil's Bit Scabious, Devilsbit

Symplocos paniculata

Symplocos paniculata

Sapphire Berry

Syringa vulgaris

Syringa vulgaris

Common Lilac, Lilac

Tabebuia rosea

Tabebuia rosea

Pink Trumpet-tree

Taraxacum officinale

Taraxacum officinale

Common Dandelion

Taxodium distichum

Taxodium distichum Northern

Northern

Bald Cypress

Taxodium distichum

Taxodium distichum Southern

Southern

Bald Cypress

Taxus brevifolia

Taxus brevifolia

Pacific Yew

Taxus wallichiana

Taxus wallichiana var. chinensis

var. chinensis

Chinese Yew

Taxus wallichiana

Taxus wallichiana var. mairei

var. mairei

Mair Yew

Thalictrum aquilegifolium

Thalictrum aquilegifolium

Columbine Meadow-rue, Meadow Rue

Thuja occidentalis

Thuja occidentalis

American Arborvitae, Arborvitae, Eastern Arborvitae, Northern Whitecedar, White Cedar

Thuja occidentalis

Thuja occidentalis Pyramidalis

'Pyramidalis'

Pyramidal American Arborvitae

Tilia cordata

Tilia cordata

Little-leaf Linden, Littleleaf Linden, Small-leaved Lime

Tilia tomentosa

Tilia tomentosa

Silver Lime, Silver Linden

Toxicodendron succedaneum

Toxicodendron succedaneum

Wax Tree

Tragopogon dubius

Tragopogon dubius

Western Goatsbeard, Yellow Salsify

Trifolium campestre

Trifolium campestre

Field Clover, Hop Trefoil

Trigonella foenum-graecum

Trigonella foenum-graecum

Fenugreek

Trillium grandiflorum

Trillium grandiflorum

Large White Trillium, White Trillium

Trillium ovatum

Trillium ovatum

Coast Trillium, Pacific Trillium