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Master Index

Silverbeet (Beta vulgaris ssp. cicla)
Silverbell, Carolina (Halesia tetraptera)
Silverberry,
     Ebbing’s (Elaeagnus × ebbingei ‘Gilt Edge’)

     Japanese (Elaeagnus umbellata)
Silvergrass, Chinese (Miscanthus sinensis)
Silverleaf
     Maple (Acer saccharinum)

     Mountain Mint (Pycnanthemum incanum)
Silverline Locoweed (Astragalus tephrodes)
Silverrod (Solidago bicolor)
Silversword, Haleakalā (Argyroxiphium sandwicense ssp. macrocephalum)
Silverweed
     (Argentina anserina)

     (Argentina egedii)
     Cinquefoil (Argentina anserina)
Silverweed, Eged’s (Argentina egedii)
Silwerboom (Leucadendron argenteum)
Simarouba glauca
Simmondsia
     californica

     chinensis
Simpler’s Joy (Verbena hastata)
Simpson’s Grape (Vitis cinerea var. floridana)
Sinapis
     alba

     juncea
Single-spored Map Lichen (Rhizocarpon disporum)
Singleleaf Piñon (Pinus monophylla)
Sinningia speciosa
Sisymbrium
     alliaria

     linearifolium
     officinale
     officinale var. leiocarpum
Sisyrinchium
     angustifolium

     arenicola
     bermudiana
     fuscatum
     graminoides
     idahoense
     incrustatum
     intermedium
     mucronatum
     rufipes
Sitka
     Alder (Alnus viridis)

     Spruce (Picea sitchensis)
Skimmia japonica
Skimmia, Japanese (Skimmia japonica)
Skullcap,
     Allegheny (Scutellaria serrata)

     Common (Scutellaria galericulata)
     Hooded (Scutellaria galericulata)
     Marsh (Scutellaria galericulata)
     Showy (Scutellaria serrata)
Skunk
     Cabbage (Symplocarpus foetidus)

     Meadowrue (Thalictrum revolutum)
     Spruce (Picea glauca)
Sky Blue Aster (Symphyotrichum oolentangiense)
Skyrocket,
     Long-flowered (Ipomopsis longiflora)

     White-flower (Ipomopsis longiflora)
Slash Pine (Pinus elliottii)
Sleder Glasswort (Salicornia depressa)
Sleeping Beauty (Oxalis corniculata)
Slender
     Blue Flag (Iris prismatica)

     Bush Clover (Lespedeza virginica)
     Fragrant Goldenrod (Euthamia caroliniana)
     Glasswort (Salicornia depressa)
     Goldentop (Euthamia caroliniana)
     Mannagrass (Glyceria melicaria)
     Rush (Juncus tenuis)
     Speedwell (Veronica filiformis)
     Toothwort (Cardamine angustata)
     Vetch (Vicia tetrasperma)
     Willow Herb (Epilobium ciliatum)
Slim Milkweed (Asclepias linearis)
Slime Mold (Fuligo septica)
Slipper Plant (Pedilanthus macrocarpus)
Slipper, Lady’s (Cypripedium acaule)
Small
     Broomrape (Orobanche minor)

     Celandine (Ranunculus ficaria)
     Cranberry (Vaccinium oxycoccos)
     Hop Clover (Trifolium dubium)
     Purple Fringed Orchid (Platanthera psycodes)
     Spotted Sandmat (Chamaesyce vermiculata)
     White Aster (Symphyotrichum racemosum)
     Yellow Lady’s Slipper (Cypripedium parviflorum var. parviflorum)
     Yellow Onion (Allium flavum)
Small-flowered
     Agalinis (Agalinis paupercula)

     Agrimony (Agrimonia parviflora)
     Fiddleneck (Amsinckia menziesii var. intermedia)
     White Aster (Symphyotrichum racemosum)
Small-headed Sunflower (Helianthus microcephalus)
Smallflower
     Agave (Agave parviflora)

     Century Plant (Agave parviflora)
Small’s Ragwort (Packera anonyma)
Smartweed,
     Carey’s (Polygonum careyi)

     Dock-leaved (Polygonum lapathifolium)
     Longroot (Polygonum amphibium)
     Nodding (Polygonum lapathifolium)
     Pale (Polygonum lapathifolium)
     Pennsylvania (Polygonum pensylvanicum)
     Water (Polygonum amphibium)
Smelling Stick (Sassafras albidum)
Smilacina
     ciliata

     flexicaulis
     racemosa
     racemosa var. cylindrata
     racemosa var. lanceolata
     racemosa var. typica
Smilax [Genus]
Smilax
     bona-nox

     bona-nox var. exauriculata
     bona-nox var. hastata
     bona-nox var. hederifolia
     herbacea
     megacarpa
     rotundifolia
     rotundifolia var. crenulata
     rotundifolia var. quadrangularis
     walteri
Smirnow Rhododendron (Rhododendron smirnowii)
Smock, Lady’s (Cardamine pratensis)
Smoke Tree (Psorothamnus spinosus)
Smoke, Prairie (Geum triflorum)
Smokethorn
     (Psorothamnus spinosus)

     Dalea (Psorothamnus spinosus)
Smoketree, American (Cotinus obovatus)
Smoky-eye Boulder Lichen (Porpidia albocaerulescens)
Smooth
     Alder (Alnus serrulata)

     Bedstraw (Galium mollugo)
     Beggartick (Bidens laevis)
     Bidens (Bidens laevis)
     Black Sedge (Carex nigra)
     Blackhaw (Viburnum prunifolium)
     Blue American-aster (Symphyotrichum laeve)
     Blue Aster (Symphyotrichum laeve)
     Bur Marigold (Bidens laevis)
     Carrion Flower (Smilax herbacea)
     Chain-fruit Cholla (Cylindropuntia fulgida var. fulgida)
     Gerardia (Agalinis purpurea)
     Goldenrod (Solidago gigantea)
     Herbaceous Greenbrier (Smilax herbacea)
     Hydrangea (Hydrangea arborescens ‘Dardom’)
     Mountain Prickly Pear (Opuntia ficus-indica)
     Prickly Pear (Opuntia ficus-indica)
     Rock Tripe (Umbilicaria mammulata)
     Solomon's Seal (Polygonatum biflorum)
     Solomon’s-seal (Polygonatum biflorum)
     Strongback (Bourreria succulenta)
     Sumac (Rhus glabra)
Snail-seed Pondweed (Potamogeton bicupulatus)
Snake
     Aloe (Aloe broomii)

     Cactus (Echinocereus pensilis)
Snake-head (Chelone glabra)
Snakeberry
     (Actaea rubra)

     (Clintonia borealis)
Snakeroot,
     Black (Actaea racemosa var. racemosa)

     Black (Actaea racemosa)
     Canadian (Asarum canadense)
     Lesser (Ageratina aromatica)
     Sticky (Ageratina adenophora)
     White (Ageratina altissima ‘Chocolate’)
     White (Ageratina altissima)
Snakeweed (Gutierrezia sarothrae)
Snakeweed, Sticky (Gutierrezia microcephala)
Snapdragon (Antirrhinum)
Snapweed (Cardamine hirsuta)
Sneezeweed,
     Common (Helenium autumnale)

     Southeastern (Helenium pinnatifidum)
Snow
     Melanthera (Melanthera nivea)

     Squarestem (Melanthera nivea)
Snowball Tree (Viburnum opulus)
Snowball, Wild (Ceanothus americanus)
Snowbell (Styrax americanus)
Snowberry,
     Common (Symphoricarpos albus)

     Western (Symphoricarpos occidentalis)
Snowflake Aloe (Aloe rauhii)
Snowy Thistle (Cirsium occidentale var. candidissimum)
Soap Grass (Xerophyllum tenax)
Soaptree Yucca (Yucca elata)
Soapweed
     (Yucca glauca)

     Yucca (Yucca glauca)
Soapwort (Saponaria officinalis)
Soapwort, Common (Saponaria officinalis)
Society Garlic (Tulbaghia violaceae)
Soft
     Maple (Acer rubrum)

     Maple (Acer saccharinum)
     Rush (Juncus effusus)
Softleaf Yucca (Yucca arkansana)
Solanum
Solanum
     carolinense

     dulcamara
     hindsianum
     parishii
     pyracanthum
Soldier, Shaggy (Galinsoga quadriradiata)
Soldiers, British (Cladonia cristatella)
Soldierwood (Colubrina elliptica)
Soldier’s Woundwort (Achillea millefolium)
Solenostemon scutellarioides ‘Copper’
Solidago [Genus]
Solidago
     axillaris

     bicolor
     caesia
     caesia var. axillaris
     caesia var. caesia
Solidago
     canadensis

     caroliniana
     flexicaulis
     gigantea
     gigantea ssp. serotina
     gigantea var. leiophylla
     gigantea var. pitcheri
     gigantea var. serotina
     gigantea var. shinnersii
     juncea
     juncea var. neobohemica
     juncea var. ramosa
     latifolia
     microcephala
     microphylla
     minor
     nemoralis
     odora
     pitcheri
     rugosa
     sarothrae
     sempervirens
     serotina
     serotinoides
     simplex
     speciosa
     squarrosa
     stricta
     tenuifolia
     uliginosa
     ×leiophallax
Soliders, British (Cladonia cristatella)
Solomon’s
     Plume (Maianthemum racemosum ssp. racemosum)

     Seal (Polygonatum odoratum)
Solomon’s-seal,
     King (Polygonatum biflorum)

     Smooth (Polygonatum biflorum)
Sonchus
Sonchus
     asper

     asper ssp. asper
     asper ssp. glaucescens
     nymanii
     oleraceus
Sonora Barrel (Ferocactus echidne)
Sonoran
     Desert Ruellia (Ruellia californica)

     Jumping Cholla (Cylindropuntia fulgida var. fulgida)
Soprano Lilac Spoon African Daisy (Osteospermum ‘Osjaseclipur’)
Sorbus
     americana

     arbutifolia
     aucuparia
     aucuparia var. xanthocarpa
Sorghastrum
     avenaceum

     nutans
Sorrel,
     Field (Rumex acetosella)

     Red (Rumex acetosella)
     Sheep (Rumex acetosella)
     Wood (Oxalis montana)
Sotol
     (Dasylirion texanum)

     (Dasylirion wheeleri)
Sotol,
     Green (Dasylirion texanum)

     Texas (Dasylirion texanum)
Sour
     Fig (Carpobrotus edulis)

     Orange (Citrus ×aurantium ssp. aurantium)
     Weed (Rumex acetosella)
Sourtop Blueberry (Vaccinium myrtilloides)
Sourwood (Oxydendrum arboreum)
Southeastern Sneezeweed (Helenium pinnatifidum)
Southern
     Arrowwood (Viburnum recognitum)

     Bayberry (Myrica cerifera)
     Beeblossom (Oenothera simulans)
     Blue Gum (Eucalyptus globulus)
     Butterly Weed (Oenothera simulans)
     Cattail (Typha domingensis)
     Cypress (Taxodium distichum)
     Gaura (Oenothera simulans)
     Live Oak (Quercus virginiana)
     Magnolia (Magnolia grandiflora)
     Maidenhair Fern (Adiantum capillus-veneris)
     Red Oak (Quercus falcata)
     Seaside Spurge (Euphorbia bombensis)
     Wax Myrtle (Myrica cerifera)
     White-cedar (Chamaecyparis thyoides)
     Wild Hyacinth (Camassia scilloides)
Southern-cypress (Taxodium distichum)
Sow
     Thistle (Sonchus oleraceus)

     Thistle (Sonchus)
Sow-thistle, Spiny-leaved (Sonchus asper)
Sowthistle,
     Common (Sonchus oleraceus)

     Prickly (Sonchus asper)
     Spiny (Sonchus asper)
Spanish
     Bayonet (Yucca baccata)

     Bayonet (Yucca harrimaniae)
     Bluebells (Hyacinthoides hispanica)
     Dagger (Yucca baccata)
     Moss (Tillandsia usneoides)
     Needles (Bidens alba)
Sparassis herbstii
Sparganium
     americanum

     californicum
     eurycarpum
     eurycarpum ssp. eurycarpum
Spathiphyllum [Genus]
Spathyema foetida
Spatterdock
     (Nuphar lutea ssp. advena)

     (Nuphar lutea)
Spatulate-leaved Sundew (Drosera intermedia)
Spear Lily (Doryanthes palmeri)
Spearmint (Mentha spicata)
Speckled Alder (Alnus incana ssp. rugosa)
Spectacle
     Pod (Dimorphocarpa wislizeni)

     Pod (Dithyrea californica)
Spectaclepod, Wizlizeni’s (Dimorphocarpa wislizeni)
Specularia perfoliata
Speedwell (Veronica spicata ssp. incana)
Speedwell,
     Broadleaf (Veronica austriaca ssp. teucrium)

     Common (Veronica officinalis)
     Corn (Veronica arvensis)
     Creeping (Veronica filiformis)
     Persian (Veronica persica)
     Silver (Veronica spicata ssp. incana)
     Slender (Veronica filiformis)
     Threadstalk (Veronica filiformis)
Spergularia
     rubra

     rubra var. perennans
Spermacoce terminalis
Sphaeralcea
     coulteri

     subhastata
Sphagnum [Genus]
Sphagnum Moss (Sphagnum)
Sphagnum
     acutifolium

     capillaceum
     capillifolium
     magellanicum
     nemoreum
     palustre
Spice Birch (Betula lenta)
Spicebush (Lindera benzoin)
Spicebush,
     Northern (Lindera benzoin var. pubescens)

     Northern (Lindera benzoin)
Spider
     Aloe (Aloe spinosissima)

     Flower (Cleome hassleriana)
     Plant (Cleome hassleriana)
Spiderflower, Bladderpod (Cleome isomeris)
Spiderwort
     (Tradescantia pallida ‘Purpurea’)

     (Tradescantia ‘Sweet Kate’)
     (Tradescantia)
Spiderwort,
     Pine (Tradescantia pinetorum)

     Pinewoods (Tradescantia pinetorum)
     Prairie (Tradescantia occidentalis)
     Virginia (Tradescantia virginiana)
     Western (Tradescantia occidentalis)
Spigelia marilandica
Spiked
     Mint Bush (Prostanthera phylicifolia)

     Woolly Speedwell (Veronica spicata ssp. incana)
Spikenard, False (Maianthemum racemosum ssp. racemosum)
Spilanthes
     acmella

     oleracea
Spindle, Winged (Euonymus alatus)
Spindles, Golden (Clavulinopsis fusiformis)
Spineless Prickly Pear (Opuntia laevis)
Spinulose
     Wood Fern (Dryopteris carthusiana)

     Woodfern (Dryopteris carthusiana)
Spiny
     Barrel Cactus (Ferocactus cylindraceus)

     Black Olive (Bucida molinetii)
     Rush (Juncus acutus)
     Senna (Senna armata)
     Sowthistle (Sonchus asper)
Spiny-leaved
     Sow Thistle (Sonchus asper)

     Sow-thistle (Sonchus asper)
Spiraea
Spiraea
     alba

     tomentosa
     tomentosa var. rosea
     tomentosa var. tomentosa
Spiraea, False (Astilbe simplicifolia ‘White Wings’)
Spiral Ginger (Costus barbatus)
Spiranthes
     cernua

     cernua var. incurva
Spleenwort,
     Maidenhair (Asplenium trichomanes ssp. trichomanes)

     Narrow-leaved (Diplazium pycnocarpon)
Splendid
     Feather Moss (Hylocomium splendens)

     Palm (Verschaffeltia splendida)
Splitleaf Indian Paintbrush (Castilleja rhexiifolia)
Spoon Jade (Crassula portulacea)
Spoon, Desert (Dasylirion wheeleri)
Spoonleaf Sundew (Drosera intermedia)
Spoonwood (Kalmia latifolia)
Sporobolus heterolepis
Spotted
     Cort (Cortinarius iodes)

     Dead Nettle (Lamium maculatum)
     Felt Lichen (Sticta fuliginosa)
     Geranium (Geranium maculatum)
     Jewelweed (Impatiens capensis)
     Joe-Pye Weed (Eupatoriadelphus dubius)
     Joe-Pye Weed (Eupatoriadelphus maculatus var. maculatus)
     Joe-Pye Weed (Eupatoriadelphus maculatus)
     Knapweed (Centaurea stoebe ssp. micranthos)
     Ladysthumb (Polygonum persicaria)
     Parsley (Cicuta maculata)
     Pipsissewa (Chimaphila maculata)
     Sandmat (Chamaesyce maculata)