Canada's Plant Hardiness Site

Data have been entered for 7138 species.

(Last updated Wed Jan 14 11:46:39 EST 2015)
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Sabal palmetto cabbage palm
Sabatia angularis squarestem rose gentian
Sabatia campanulata slender rose gentian
Sabatia kennedyana Plymouth gentian
Saccharum ravennae northern pampas grass
Sageretia minutiflora
Sagina caespitosa tufted pearlwort
Sagina decumbens spreading pearlwort
Sagina nivalis snow pearlwort
Sagina nodosa knotty pearlwort
Sagina nodosa subsp. borealis knotty pearlwort
Sagina procumbens matted pearlwort
Sagina saginoides alpine pearlwort
Sagina subulata Scottish moss
Sagittaria australis longbeak arrowhead
Sagittaria brevirostra shortbeak arrowhead
Sagittaria cristata crested arrowhead
Sagittaria cuneata northern arrowhead
Sagittaria engelmanniana
Sagittaria graminea grassleaf arrowhead
Sagittaria graminea subsp. graminea grassleaf arrowhead
Sagittaria isoetiformis quillwort arrowhead
Sagittaria latifolia broadleaf arrowhead
Sagittaria montevidensis giant arrowhead
Sagittaria montevidensis subsp. spongiosa spongy arrowhead
Sagittaria rigida sessilefruit arrowhead
Sagittaria sanfordii valley arrowhead
Sagittaria teres slender arrowhead
Salicornia depressa Virginia glasswort
Salicornia maritima sea saltwort
Salicornia rubra red samphire
Salix alaxensis feltleaf willow
Salix alaxensis var. alaxensis feltleaf willow
Salix alaxensis var. longistylis feltleaf willow
Salix alba white willow
Salix amygdaloides peachleaf willow
Salix arbusculoides littletree willow
Salix arctica tundra willow
Salix arctophila northern willow
Salix argyrocarpa
Salix athabascensis littletree willow
Salix atrocinerea rusty willow
Salix babylonica true weeping willow
Salix ballii Ball's willow
Salix barclayi mountain willow
Salix barrattiana Barratt's willow
Salix bebbiana beaked willow
Salix boothii Booth's willow
Salix brachycarpa smallfruit willow
Salix brachycarpa var. brachycarpa smallfruit willow
Salix calcicola limestone willow
Salix calcicola var. calcicola calcareous willow
Salix candida sageleaf willow
Salix caprea great sallow
Salix cascadensis
Salix chamissonis
Salix commutata undergreen willow
Salix cordata heartleaf willow
Salix daphnoides European violet willow
Salix discolor pussy willow
Salix drummondiana Drummond's willow
Salix elaeagnos rosemaryleaf willow
Salix eriocephala diamond willow
Salix exigua coyote willow
Salix exigua var. exigua coyote willow
Salix famelica starved willow
Salix farriae Farr's willow
Salix floridana Florida willow
Salix geyeriana Geyer's willow
Salix glauca grayleaf willow
Salix glauca var. callicarpaea northern willow
Salix gracilistyla rosegold pussy willow
Salix herbacea
Salix hookeriana Hooker's willow
Salix humilis gray willow
Salix humilis var. humilis prairie willow
Salix humilis var. tristis
Salix integra Japanese willow
Salix interior riverbank willow
Salix lanata woolly willow
Salix lasiandra Pacific willow
Salix lasiandra var. caudata tail-leaf willow
Salix lasiandra var. lasiandra Pacific willow
Salix lucida glossy willow
Salix lutea yellow willow
Salix maccalliana velvetfruit willow
Salix matsudana Peking willow
Salix melanopsis longleaf willow
Salix monticola mountain willow
Salix myricoides blueleaf willow
Salix myrtillifolia bilberry willow
Salix nigra swamp willow
Salix nivalis
Salix pedicellaris bog willow
Salix pellita thickleaf willow
Salix pentandra bayleaf willow
Salix pentaphyllum prairie cascade willow
Salix petiolaris slender willow
Salix planifolia flatleaf willow
Salix prolixa Mackenzie's willow
Salix pseudomonticola false mountain willow
Salix pseudomyrsinites firmleaf willow
Salix pulchra diamondleaf willow
Salix purpurea purple willow
Salix pyrifolia pearleaf willow
Salix repens creeping willow
Salix reticulata netleaf willow
Salix scouleriana mountain willow
Salix serissima autumn willow
Salix setchelliana
Salix sitchensis Sitka willow
Salix tweedyi Tweedy's willow
Salix uva-ursi
Salix vestita rock willow
Salix viminalis common osier
Salix Xfragilis crack willow
Salix Xpendulina weeping crack willow
Salix Xrubens hybrid white willow
Salix Xsepulcralis Kemp willow
Salix Xwaghornei Waghorne's willow
Salsola collina slender Russian thistle
Salsola kali Russian thistle
Salsola tragus prickly Russian thistle
Salvia argentea silver sage
Salvia azurea azure blue sage
Salvia guaranitica giant blue sage
Salvia lyrata cancerweed
Salvia nemorosa
Salvia officinalis garden sage
Salvia pratensis meadow sage
Salvia reflexa
Salvia verticillata lilac sage
Salvia Xsylvestris Balkan clary
Sambucus caerulea blue elderberry
Sambucus canadensis common elderberry
Sambucus nigra black elderberry
Sambucus racemosa red elderberry
Samolus parviflorus seaside brookweed
Sanguinaria canadensis redroot
Sanguisorba canadensis Canadian burnet
Sanguisorba menziesii Alaskan Burnet
Sanguisorba obtusa Japanese burnet
Sanicula arctopoides bear's-foot sanicle
Sanicula canadensis Canada sanicle
Sanicula canadensis var. canadensis Canada sanicle
Sanicula graveolens Sierra sanicle
Sanicula marilandica black snakeroot
Sanicula odorata odoriferous snakeroot
Sanicula trifoliata largefruit sanicle
Santolina chamaecyparissus gray santolina
Sapindus saponaria var. drummondii western soapberry
Saponaria 'Bressingham' alpine soapwort
Saponaria ocymoides rock soapwort
Saponaria officinalis bouncing bet
Sarcobatus vermiculatus black greasewood
Sarcococca hookeriana Himalayan sweetbox
Sarcococca ruscifolia fragrant sarcococca
Sarcocornia perennis perennial glasswort
Sarracenia flava
Sarracenia leucophylla
Sarracenia minor
Sarracenia psittacina
Sarracenia purpurea huntsman's cup
Sarracenia rubra
Sasa palmata palmata bamboo
Sassafras albidum white sassafras
Sassafras albidum var. molle silky sassafras
Satureja hortensis
Satureja montana winter savory
Saururus cernuus lizard's tail
Saxifraga adscendens Oregon saxifrage
Saxifraga adscendens subsp. oregonensis Oregon saxifrage
Saxifraga aizoides yellow mountain saxifrage
Saxifraga bronchialis spotted saxifrage
Saxifraga caroliniana
Saxifraga cernua nodding saxifrage
Saxifraga cespitosa tufted saxifrage
Saxifraga cespitosa subsp. monticola tufted alpine saxifrage
Saxifraga cotyledon pyramidal saxifrage
Saxifraga flagellaris whiplash saxifrage
Saxifraga flagellaris subsp. setigera whiplash saxifrage
Saxifraga hirculus bog saxifrage
Saxifraga mertensiana wood saxifrage
Saxifraga moschata mossy saxifrage
Saxifraga oppositifolia purple mountain saxifrage
Saxifraga oppositifolia subsp. oppositifolia purple mountain saxifrage
Saxifraga paniculata encrusted saxifrage
Saxifraga rivularis alpine brook saxifrage
Saxifraga stolonifera strawberry begonia
Saxifraga tricuspidata prickly saxifrage
Saxifraga Xapiculata alpine saxifrage
Saxifraga Xarendsii mossy saxifrage
Scabiosa 'Butterfly Blue' hybrid pincushion flower
Scabiosa caucasica pincushion flower
Scabiosa ochroleuca
Schedonnardus paniculatus tumblegrass
Schedonorus arundinaceus tall fesque
Schedonorus pratensis meadow fescue
Scheuchzeria palustris marsh scheuchzeria
Schisandra chinensis Northern schisandra
Schisandra glabra
Schisandra sphenanthera Southern schisandra
Schizachne purpurascens purple melic grass
Schizachyrium littorale shore bluestem
Schizachyrium scoparium little bluestem
Schizachyrium scoparium var. scoparium little bluestem
Schizaea pusilla curylgrass fern
Schizophragma hydrangeoides Japanese hydrangea-vine
Schoenolirion croceum yellow sunnybells
Schoenoplectus acutus hardstem bulrush
Schoenoplectus acutus var. acutus hardstem bulrush
Schoenoplectus americanus American bulrush
Schoenoplectus etuberculatus
Schoenoplectus hallii
Schoenoplectus heterochaetus slender bulrush
Schoenoplectus pungens canemaker's rush
Schoenoplectus purshianus weakstalk clubrush
Schoenoplectus purshianus var. purshianus weakstalk clubrush
Schoenoplectus saximontanus Rocky Mountain clubrush
Schoenoplectus smithii Smith's clubrush
Schoenoplectus smithii var. smithii Smith's bulrush
Schoenoplectus subterminalis water clubrush
Schoenoplectus tabernaemontani great bulrush
Schoenoplectus torreyi Torrey's threesquare bulrush
Schwalbea americana
Sciadopitys verticillata Japanese table pine
Scilla bifolia alpine squill
Scilla mischtschenkoana Tubergen squill
Scilla siberica Siberian squill
Scirpus ancistrochaetus barbed bristle bulrush
Scirpus atrocinctus blackgirdled bulrush
Scirpus atrovirens darkgreen bulrush
Scirpus cyperinus woolgrass
Scirpus expansus woodland bulrush
Scirpus georgianus bristleless darkgreen bulrush
Scirpus hattorianus early darkgreen bulrush
Scirpus longii Long's bulrush
Scirpus microcarpus redtinged bulrush
Scirpus pallidus pale bulrush
Scirpus pedicellatus pedicelled bulrush
Scirpus pendulus hanging bulrush
Scirpus polyphyllus
Scleranthus annuus annual knawel
Scleria pauciflora papillose nutrush
Scleria pauciflora var. pauciflora papillose nutrush
Scleria reticularis
Scleria triglomerata whip nutrush
Scleria verticillata low nutrush
Sclerocactus glaucus Uinta Basin hookless cactus
Sclerocactus mesae-verdae Mesa Verde fishhook cactus
Sclerocactus papyracanthus paper-spined cactus
Sclerocactus wrightiae Wright's cactus
Sclerochloa dura hardgrass
Scolochloa festucacea spangle-top
Scopolia carniolica purple scopolia
Scrophularia lanceolata American figwort
Scrophularia marilandica Maryland figwort
Scutellaria alpina alpine skullcap
Scutellaria galericulata common scullcap
Scutellaria integrifolia
Scutellaria lateriflora blue skullcap
Scutellaria montana
Scutellaria nervosa
Scutellaria parvula small skullcap
Scutellaria parvula var. missouriensis Leonard's skullcap
Scutellaria parvula var. parvula small skullcap
Scutellaria saxatilis
Scutellaria serrata
Scutellaria Xchurchilliana
Secale cereale rye
Securigera varia axseed
Securinega suffruticosa shrubby Siberian spurge
Sedum 'Vera Jameson' hybrid stonecrop
Sedum Autumn Joy ('Herbstfreude') autumn stonecrop
Sedum acre mossy stonecrop
Sedum alboroseum variegated autumn stonecrop
Sedum album coral carpet stonecrop
Sedum divergens old-man-bones stonecrop
Sedum ewersii pink stonecrop
Sedum kamtschaticum Russian stonecrop
Sedum oblanceolatum
Sedum oreganum Oregon stonecrop
Sedum pusillum
Sedum reflexum blue spruce stonecrop
Sedum sarmentosum stringy stonecrop
Sedum sieboldii October daphne
Sedum spathulifolium spatulateleaf stonecrop
Sedum spectabile showy stonecrop
Sedum spurium tworow stonecrop
Sedum telephium autumn stonecrop
Sedum ternatum wood stonecrop
Selaginella densa prairie spikemoss
Selaginella eclipes hidden spikemoss
Selaginella rupestris rock spikemoss
Selaginella selaginoides northern spikemoss
Selaginella wallacei Wallace's spikemoss
Sempervivum Hybrids hens and chicks
Sempervivum arachnoideum cobweb hens and chicks
Sempervivum tectorum hens and chicks
Senecio eremophilus dryland ragwort
Senecio fremontii
Senecio hydrophiloides
Senecio hydrophilus
Senecio integerrimus
Senecio integerrimus var. integerrimus
Senecio lugens
Senecio megacephalus
Senecio pseudoarnica
Senecio sylvaticus
Senecio triangularis
Senecio viscosus sticky ragwort
Senecio vulgaris common ragwort
Senegalia greggii catclaw acacia
Senna hebecarpa American senna
Sequoia sempervirens coastal redwood
Sequoiadendron giganteum mammoth tree
Sericocarpus linifolius
Sericocarpus rigidus Columbia whitetop aster
Setaria faberi giant foxtail
Setaria italica Hungarian millet
Setaria pumila yellow foxtail
Setaria pumila subsp. pumila yellow foxtail
Setaria verticillata bristly foxtail
Setaria viridis green bristle grass
Shepherdia argentea silver buffaloberry
Shepherdia canadensis soapberry
Sherardia arvensis cultivated field madder
Shinnersoseris rostrata
Shortia galacifolia Oconee bells
Sibbaldia procumbens creeping sibbaldia
Sibbaldia tridentata threetoothed cinquefoil
Sicyos angulatus angled bur-cucumber
Sida hermaphrodita Virginia mallow
Sida spinosa prickly mallow
Sidalcea hendersonii Henderson's checkerbloom
Sidalcea nelsoniana Nelson's checkermallow
Sidalcea oregana Oregon checkermallow
Sidalcea Xmalviflora hybrid prairie mallow
Silene acaulis moss campion
Silene antirrhina sleepy catchfly
Silene caroliniana
Silene caroliniana subsp. pensylvanica
Silene chalcedonica scarlet lychnis
Silene coronaria mullein pink
Silene dichotoma forked catchfly
Silene dioica red campion
Silene douglasii Douglas' catchfly
Silene drummondii Drummond's catchfly
Silene flos-cuculi meadow campion
Silene gallica small-flowered catchfly
Silene involucrata arctic catchfly
Silene involucrata subsp. involucrata arctic catchfly
Silene latifolia white cockle
Silene menziesii Menzie's catchfly
Silene nivea
Silene noctiflora night-flowering catchfly
Silene nuda sticky catchfly
Silene ovata
Silene regia royal catchfly
Silene repens
Silene rotundifolia
Silene scaposa var. scaposa
Silene schafta autumn catchfly
Silene spaldingii
Silene stellata
Silene subciliata
Silene uniflora rock campion
Silene uralensis mountain campion
Silene virginica fire pink
Silene viscaria sticky catchfly
Silene vulgaris maiden's tears
Silphium brachiatum
Silphium integrifolium rosin weed
Silphium laciniatum compass plant
Silphium perfoliatum cup plant
Silphium perfoliatum var. perfoliatum cup plant
Silphium terebinthinaceum prairie dock
Silphium wasiotense
Silybum marianum
Sinapis alba mustard cress
Sinapis arvensis charlock
Sisymbrium altissimum tall sisymbrium
Sisymbrium loeselii tall hedgemustard
Sisymbrium officinale hedge mustard
Sisyrinchium albidum white blue-eyed grass
Sisyrinchium angustifolium eastern blue-eyed grass
Sisyrinchium atlanticum strict blue-eyed grass
Sisyrinchium campestre prairie blue-eyed grass
Sisyrinchium fuscatum coastal plain blue-eyed grass
Sisyrinchium idahoense Idaho blue-eyed grass
Sisyrinchium idahoense var. idahoense Idaho blue-eyed-grass
Sisyrinchium montanum common blue-eyed grass
Sisyrinchium montanum var. crebrum common blue-eyed grass
Sisyrinchium mucronatum eastern blue-eyed grass
Sisyrinchium pallidum pale blue-eyed grass
Sisyrinchium septentrionale northern blue-eyed grass
Sium suave hemlock water parsnip
Skimmia japonica Japanese skimmia
Skimmia reevesiana Reeves' skimmia
Smallanthus uvedalius
Smilax ecirrata
Smilax ecirrhata greenbrier
Smilax herbacea herbaceous carrion flower
Smilax illinoensis Illinois greenbriar
Smilax lasioneura hairy carrion flower
Smilax pulverulenta Jacob's ladder
Smilax rotundifolia common greenbrier
Smilax tamnoides China root
Solanum carolinense
Solanum dulcamara climbing nightshade
Solanum nigrum poisonberry
Solanum physalifolium hairy nightshade
Solanum ptychanthum eastern black nightshade
Solanum rostratum buffalobur
Solanum triflorum cutleaf nightshade
Solanum tuberosum Irish potato
Solidago albopilosa
Solidago altissima tall goldenrod
Solidago altissima subsp. altissima tall goldenrod
Solidago altissima subsp. gilvocanescens Great Plains late goldenrod
Solidago arguta cutleaf goldenrod
Solidago arguta var. arguta
Solidago arguta var. harrisii
Solidago bicolor white goldenrod
Solidago caesia bluestem goldenrod
Solidago canadensis Canada goldenrod
Solidago canadensis var. canadensis Canada goldenrod
Solidago canadensis var. hargeri Harger's goldenrod
Solidago flexicaulis broadleaf goldenrod
Solidago gigantea giant goldenrod
Solidago hispida hairy goldenrod
Solidago houghtonii Houghton's goldenrod
Solidago juncea smooth goldenrod
Solidago latissimifolia
Solidago lepida western Canada goldenrod
Solidago lepida subsp. lepida var. salebrosa graceful goldenrod
Solidago macrophylla largeleaf goldenrod
Solidago missouriensis prairie goldenrod
Solidago mollis
Solidago multiradiata northern goldenrod
Solidago nemoralis gray-stemmed goldenrod
Solidago nemoralis subsp. nemoralis wood goldenrod
Solidago odora
Solidago ohioensis Ohio goldenrod
Solidago patula
Solidago patula subsp. patula
Solidago ptarmicoides upland white goldenrod
Solidago puberula
Solidago radula
Solidago riddellii Riddell's goldenrod
Solidago rigida stiff goldenrod
Solidago rigida subsp. humilis stiff goldenrod
Solidago rigida subsp. rigida stiff goldenrod
Solidago rugosa wrinkle-leaf goldenrod
Solidago rugosa subsp. rugosa var. rugosa wrinkle-leaf goldenrod
Solidago sciaphila cliff goldenrod
Solidago sempervirens evergreen goldenrod
Solidago sempervirens subsp. sempervirens evergreen goldenrod
Solidago simplex Mt.Albert goldenrod
Solidago simplex subsp. randii
Solidago simplex subsp. randii var. gillmanii dune goldenrod
Solidago simplex subsp. randii var. monticola
Solidago simplex subsp. randii var. ontarioensis Ontario goldenrod
Solidago simplex subsp. randii var. racemosa
Solidago simplex subsp. randii var. randii Rand's goldenrod
Solidago simplex subsp. simplex
Solidago simplex subsp. simplex var. chlorolepis
Solidago simplex subsp. simplex var. simplex mountain goldenrod
Solidago speciosa showy goldenrod
Solidago speciosa var. speciosa
Solidago sphacelata heart-leaf goldenrod
Solidago squarrosa bracted goldenrod
Solidago stricta
Solidago uliginosa bog goldenrod
Solidago ulmifolia
Solidago ulmifolia var. ulmifolia
Solidago verna
Solidago virgaurea early goldenrod
Solidago Xcalcicola
Solidago Xkrotkovii Krotkov's goldenrod
Solidago Xlutescens
Solidaster Xluteus yellow solidaster
Sonchus arvensis field sowthistle
Sonchus arvensis subsp. uliginosus smooth sowthistle
Sonchus asper rough sowthistle
Sonchus oleraceus milk thistle
Sophora leachiana
Sorbaria kirilowii giant false spiraea
Sorbaria sorbifolia false spiraea
Sorbaria tomentosa Kashmir false spiraea
Sorbus alnifolia alderleaf whitebeam
Sorbus americana dogberry
Sorbus aria chessapple
Sorbus aucuparia rowan
Sorbus cashmiriana Kashmir mountain ash
Sorbus commixta Chinese scarlet rowan
Sorbus decora showy mountainash
Sorbus discolor Chinese mountain ash
Sorbus hybrida Swedish servicetree
Sorbus intermedia Swedish whitebeam
Sorbus japonica Japanese servicetree
Sorbus reducta dwarf mountain ash
Sorbus scopulina Greene's mountain ash
Sorbus sitchensis Sitka mountain ash
Sorbus sitchensis var. grayi western mountain ash
Sorbus torminalis chequers
Sorghastrum elliottii
Sorghastrum nutans Indian grass
Sorghum bicolor sorghum
Sorghum bicolor subsp. x drummondii Sudan grass
Sparganium americanum American burreed
Sparganium androcladum branching burreed
Sparganium angustifolium narrowleaf burreed
Sparganium emersum unbranched burreed
Sparganium eurycarpum giant burreed
Sparganium fluctuans floating burreed
Sparganium glomeratum clustered burreed
Sparganium hyperboreum northern burreed
Sparganium natans least burreed
Spartina alterniflora smooth cordgrass
Spartina gracilis alkali cordgrass
Spartina patens saltmeadow cordgrass
Spartina pectinata freshwater cordgrass
Spartina Xcaespitosa mixed cordgrass
Spartium junceum weaver's broom
Spergula arvensis corn spurry
Spergularia canadensis Canada sandspurry
Spergularia canadensis var. canadensis Canada sandspurry
Spergularia media greater seaspurry
Spergularia rubra red sandspurry
Spergularia salina saltmarsh sandspurry
Speyeria idalia regal fritillary
Sphaeralcea coccinea scarlet globemallow
Sphenopholis intermedia slender wedgegrass
Sphenopholis nitida shiny wedgescale
Sphenopholis pensylvanica
Spigelia marilandica Indian pink
Spiraea alba narrowleaf meadowsweet
Spiraea alba var. latifolia northern meadowsweet
Spiraea albiflora Japanese white spirea
Spiraea betulifolia
Spiraea betulifolia var. aemiliana birchleaf spirea
Spiraea chamaedryfolia
Spiraea corymbosa
Spiraea decumbens white lace spirea
Spiraea douglasii western pink spiraea
Spiraea douglasii var. menziesii
Spiraea fritschiana Fritsch spiraea
Spiraea japonica Bumald spirea
Spiraea latifolia large-leaved meadowsweet
Spiraea lucida shinyleaf spiraea
Spiraea nipponica Nippon spirea
Spiraea prunifolia bridal wreath spiraea
Spiraea salicifolia
Spiraea splendens
Spiraea splendens var. splendens mountain spirea
Spiraea thunbergii Thunberg's spirea
Spiraea tomentosa steeplebush
Spiraea trichocarpa Korean spiraea
Spiraea trilobata Asian meadowsweet
Spiraea virginiana
Spiraea Xarguta bridal spray
Spiraea Xbilliardii Billiard's spirea
Spiraea Xcinerea Grefsheim spirea
Spiraea Xpyramidata
Spiraea Xvanhouttei VanHoutte spiraea
Spiranthes casei Case's ladies-tresses
Spiranthes casei var. casei Case's ladies-tresses
Spiranthes casei var. novaescotiae Nova Scotia ladiestresses
Spiranthes cernua nodding ladiestresses
Spiranthes diluvialis Ute ladiestresses
Spiranthes lacera northern slender ladies-tresses
Spiranthes lacera var. gracilis southern slender ladies-tresses
Spiranthes lacera var. lacera northern slender ladies-tresses
Spiranthes lucida shining ladiestresses
Spiranthes magnicamporum prairie ladiestresses
Spiranthes ochroleuca yellow nodding ladies-tresses
Spiranthes ovalis oval ladiestresses
Spiranthes ovalis var. erostellata oval ladiestresses
Spiranthes ovalis var. ovalis oval ladiestresses
Spiranthes parksii
Spiranthes romanzoffiana hooded ladiestresses
Spiranthes vernalis
Spirodela polyrhiza great duckweed
Sporobolus airoides alkali sacaton
Sporobolus compositus rough dropseed
Sporobolus compositus var. compositus rough dropseed
Sporobolus cryptandrus sand dropseed
Sporobolus heterolepis shortscaled dropseed
Sporobolus neglectus puffsheath dropseed
Sporobolus vaginiflorus poverty dropseed
Sporobolus vaginiflorus var. ozarkanus Ozark dropseed
Sporobolus vaginiflorus var. vaginiflorus poverty dropseed
Stachys annua
Stachys byzantina woolly hedgenettle
Stachys hispida
Stachys hyssopifolia
Stachys macrantha big betony
Stachys mexicana Mexican hedge-nettle
Stachys officinalis wood betony
Stachys palustris marsh hedgenettle
Stachys pilosa hairy hedgenettle
Stachys pilosa var. arenicola woundwort
Stachys pilosa var. pilosa hairy hedgenettle
Stachys sylvatica
Stachys tenuifolia
Stachyurus praecox early spiketail
Stanleya pinnata prince's plume
Stanleya pinnata var. pinnata
Staphylea trifolia American bladdernut
Stellaria alaskana Alaska starwort
Stellaria alsine bog starwort
Stellaria americana American starwort
Stellaria borealis northern stitchwort
Stellaria borealis subsp. borealis northern stitchwort
Stellaria crassifolia fleshy starwort
Stellaria crispa crimped stitchwort
Stellaria fontinalis American water starwort
Stellaria graminea grassleaf starwort
Stellaria humifusa saltmarsh starwort
Stellaria longifolia longleaf stitchwort
Stellaria longipes longstalk starwort
Stellaria longipes subsp. longipes Goldie's starwort
Stellaria media chickweed starwort
Stellaria obtusa meadow chickweed
Stellaria pallida pale starwort
Stellaria umbellata umbellate starwort
Stenanthium gramineum
Stenotus armerioides
Stenotus armerioides var. armerioides
Stephanandra incisa cutleaf stephanandra
Stephanandra tanakae Japanese stephanandra
Stephanomeria runcinata
Sternbergia lutea winter daffodil
Stewartia koreana Korean stewartia
Stewartia malacodendron silky camellia
Stewartia monadelpha tall stewartia
Stewartia ovata mountain stewartia
Stewartia pseudocamellia Japanese stewartia
Stewartia sinensis Chinese stewartia
Stokesia laevis Stokes' aster
Streptanthus glandulosus
Streptopus amplexifolius claspingleaf twistedstalk
Streptopus lanceolatus rose twistedstalk
Streptopus lanceolatus var. lanceolatus
Streptopus streptopoides small twistedstalk
Strophostyles helvola trailing fuzzy bean
Strophostyles leiosperma
Stuckenia filiformis threadleaf pondweed
Stuckenia filiformis subsp. alpina red pondweed
Stuckenia filiformis subsp. occidentalis western threadleaf pondweed
Stuckenia pectinata fennel-leaf pondweed
Stuckenia vaginata bigsheath pondweed
Stylisma pickeringii var. pickeringii
Stylocline citroleum
Stylophorum diphyllum celandine poppy
Stylosanthes biflora
Styphnolobium japonicum Japanese pagoda tree
Styrax americanus mock-orange
Styrax grandifolius bigleaf snowbell
Styrax japonicus Japanese snowball
Styrax obassia fragrant snowbell
Suaeda calceoliformis horned seablite
Suaeda maritima annual seablite
Suaeda nigra bush seepweed
Suaeda rolandii Roland's seablite
Subularia aquatica water awlwort
Subularia aquatica subsp. americana water awlwort
Succisa pratensis
Suckleya suckleyana sucklea saltbush
Suksdorfia ranunculifolia buttercupleaf suksdorfia
Suksdorfia violacea violet suksdorfia
Sullivantia sullivantii
Swertia perennis alpine bog swertia
Symphoricarpos albus waxberry
Symphoricarpos albus var. albus
Symphoricarpos hesperius western trailing snowberry
Symphoricarpos mollis trailing snowberry
Symphoricarpos occidentalis wolfberry
Symphoricarpos orbiculatus coralberry
Symphoricarpos oreophilus mountain snowberry
Symphoricarpos Xchenaultii Chenault coralberry
Symphyandra hofmannii symphyandra
Symphyotrichum anticostense
Symphyotrichum ascendens
Symphyotrichum boreale northern bog aster
Symphyotrichum campestre var. campestre
Symphyotrichum ciliatum rayless alkali aster
Symphyotrichum ciliolatum Lindley's aster
Symphyotrichum concolor
Symphyotrichum cordifolium heartleaf aster
Symphyotrichum dumosum rice button aster
Symphyotrichum eatonii Eaton's aster
Symphyotrichum ericoides heath aster
Symphyotrichum ericoides var. ericoides heath aster
Symphyotrichum ericoides var. pansus manyflowered aster
Symphyotrichum falcatum var. commutatum rough white panicled aster
Symphyotrichum falcatum var. falcatum rough white panicled aster
Symphyotrichum frondosum
Symphyotrichum georgianum
Symphyotrichum hallii
Symphyotrichum jessicae
Symphyotrichum laeve glaucous aster
Symphyotrichum laeve var. laeve glaucous aster
Symphyotrichum lanceolatum tall white aster
Symphyotrichum lanceolatum subsp. hesperium western panicled aster
Symphyotrichum lanceolatum subsp. lanceolatum var. interior interior white aster
Symphyotrichum lanceolatum subsp. lanceolatum var. latifolium broad-leaved panicled aster
Symphyotrichum lanceolatum var. hirsuticaule tall white aster
Symphyotrichum lanceolatum var. lanceolatum eastern lined aster
Symphyotrichum lateriflorum calico aster
Symphyotrichum lateriflorum var. angustifolium starved aster
Symphyotrichum lateriflorum var. lateriflorum calico aster
Symphyotrichum lateriflorum var. tenuipes one-sided aster
Symphyotrichum laurentianum
Symphyotrichum lentum
Symphyotrichum novae-angliae New England aster
Symphyotrichum novi-belgii New York aster
Symphyotrichum novi-belgii var. crenifolium
Symphyotrichum novi-belgii var. elodes
Symphyotrichum novi-belgii var. novi-belgii Michaelmas daisy
Symphyotrichum novi-belgii var. villicaule hairystem New York aster
Symphyotrichum oblongifolium
Symphyotrichum ontarionis Ontario aster
Symphyotrichum ontarionis var. ontarionis Ontario aster
Symphyotrichum oolentangiense azure aster
Symphyotrichum patens
Symphyotrichum pilosum white oldfield aster
Symphyotrichum pilosum var. pilosum white oldfield aster
Symphyotrichum pilosum var. pringlei Pringle's aster
Symphyotrichum praealtum willow aster
Symphyotrichum praealtum var. praealtum
Symphyotrichum prenanthoides
Symphyotrichum puniceum swamp aster
Symphyotrichum puniceum var. puniceum swamp aster
Symphyotrichum puniceum var. scabricaule
Symphyotrichum racemosum
Symphyotrichum robynsianum longleaf blue aster
Symphyotrichum sericeum western silvery aster
Symphyotrichum shortii
Symphyotrichum subspicatum
Symphyotrichum subulatum
Symphyotrichum subulatum var. subulatum
Symphyotrichum tradescantii
Symphyotrichum turbinellum prairie aster
Symphyotrichum undulatum
Symphyotrichum urophyllum
Symphyotrichum Xamethystinum
Symphyotrichum yukonense
Symphytum asperum prickly comfrey
Symphytum officinale healing-herb
Symplocarpus foetidus eastern skunk cabbage
Symplocos paniculata Asiatic sweetleaf
Symplocos tinctoria common sweetleaf
Synthyris wyomingensis Wyoming coraldrops
Syringa josikaea Hungarian lilac
Syringa komarowii subsp. reflexa nodding lilac
Syringa komarowii subsp. reflexa nodding lilac
Syringa oblata early lilac
Syringa pubescens subsp. microphylla littleleaf lilac
Syringa pubescens subsp. patula Manchurian lilac
Syringa pubescens subsp. pubescens meyer lilac
Syringa reticulata Japanese tree lilac
Syringa reticulata subsp. pekinensis pekin lilac
Syringa reticulata subsp. reticulata Japanese tree lilac
Syringa sweginzowii Chengfu lilac
Syringa villosa late lilac
Syringa vulgaris French hybrid lilac
Syringa Xchinensis Chinese lilac
Syringa Xhyacinthiflora
Syringa Xlaciniata cutleaf lilac
Syringa Xpersica Persian lilac
Syringa Xprestoniae Preston lilac