Explore / Wetland gradient / Obligate wetland (OBL)
Wetland gradient
Obligate wetland (OBL)
Species USDA classifies as OBL — found in wetlands more than 99% of the time. Cattails, marsh marigold, the duckweeds. The canonical "this site is a wetland" indicators.
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Showing 1,801–1,850 of 1,999.
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Spartina pectinata Bosc ex Link SPPEprairie cordgrass · Poaceae -
Spartina spartinae (Trin.) Merr. ex Hitchc. SPSPgulf cordgrass · Poaceae - Spartina ×caespitosa A.A. Eaton (pro sp.) [patens × pectinata] SPCAcordgrass · Poaceae
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Spergularia canadensis (Pers.) G. Don SPCA3Canadian sandspurry · Caryophyllaceae -
Spergularia echinosperma (Celak.) Asch. & Graebn. SPECbristleseed sandspurry · Caryophyllaceae -
Spergularia platensis (Camb.) Fenzl SPPL2La Plata sandspurry · Caryophyllaceae -
Spergularia salina J. Presl & C. Presl SPSA5salt sandspurry · Caryophyllaceae -
Sphenoclea zeylanica Gaertn. SPZEchickenspike · Sphenocleaceae -
Sphenopholis pensylvanica (L.) Hitchc. SPPE3swamp wedgescale · Poaceae -
Spiraea salicifolia L. SPSA2willowleaf meadowsweet · Rosaceae -
Spiranthes delitescens Sheviak SPDE6reclusive lady's tresses · Orchidaceae -
Spiranthes laciniata (Small) Ames SPLA3lacelip lady's tresses · Orchidaceae -
Spiranthes longilabris Lindl. SPLO2giantspiral lady's tresses · Orchidaceae -
Spiranthes odorata (Nutt.) Lindl. SPODmarsh lady's tresses · Orchidaceae -
Spiranthes praecox (Walter) S. Watson SPPR2greenvein lady's tresses · Orchidaceae -
Spiranthes romanzoffiana Cham. SPROhooded lady's tresses · Orchidaceae -
Spirodela polyrrhiza (L.) Schleid. SPPOcommon duckmeat · Lemnaceae -
Stachys ajugoides Benth. STAJbugle hedgenettle · Lamiaceae -
Stachys albens A. Gray STALwhitestem hedgenettle · Lamiaceae -
Stachys appalachiana D.B. Poind. & J.B. Nelson STAP5Appalachian hedgenettle · Lamiaceae -
Stachys chamissonis Benth. STCHcoastal hedgenettle · Lamiaceae -
Stachys hyssopifolia Michx. STHY3hyssopleaf hedgenettle · Lamiaceae -
Stachys palustris L. STPAmarsh hedgenettle · Lamiaceae -
Stachys stricta Greene STSTSonoma hedgenettle · Lamiaceae -
Stachys tenuifolia Willd. STTEsmooth hedgenettle · Lamiaceae -
Steinchisma hians (Elliott) Nash STHI3gaping grass · Poaceae -
Stellaria alsine Grimm STAL4bog chickweed · Caryophyllaceae -
Stellaria borealis Bigelow STBO3boreal starwort · Caryophyllaceae -
Stellaria crassifolia Ehrh. STCRfleshy starwort · Caryophyllaceae -
Stellaria humifusa Rottb. STHUsaltmarsh starwort · Caryophyllaceae -
Stellaria littoralis Torr. STLIbeach starwort · Caryophyllaceae -
Stellaria longipes Goldie STLO2longstalk starwort · Caryophyllaceae -
Stemodia durantifolia (L.) Sw. STDUwhitewoolly twintip · Scrophulariaceae -
Stenandrium dulce (Cav.) Nees STDU2sweet shaggytuft · Acanthaceae -
Stillingia aquatica Chapm. STAQ2water toothleaf · Euphorbiaceae -
Stuckenia filiformis (Pers.) Börner STFI6fineleaf pondweed · Potamogetonaceae -
Stuckenia pectinata (L.) Börner STPE15sago pondweed · Potamogetonaceae -
Stuckenia striata (Ruiz & Pav.) Holub STST20broadleaf pondweed · Potamogetonaceae -
Stuckenia vaginata (Turcz.) Holub STVA8sheathed pondweed · Potamogetonaceae -
Styrax americanus Lam. STAM4American snowbell · Styracaceae -
Suaeda conferta (Small) I.M. Johnst. SUCObeach seepweed · Chenopodiaceae -
Suaeda linearis (Elliott) Moq. SULIannual seepweed · Chenopodiaceae -
Suaeda maritima (L.) Dumort. SUMAherbaceous seepweed · Chenopodiaceae -
Suaeda moquinii (Torr.) Greene SUMOMojave seablite · Chenopodiaceae -
Subularia aquatica L. SUAQwaterawlwort · Brassicaceae -
Sullivantia hapemanii (J.M. Coult. & Fisher) J.M. Coult. SUHAHapeman's coolwort · Saxifragaceae -
Symphyotrichum bahamense (Britton) G.L. Nesom SYBA5Bahaman aster · Asteraceae -
Symphyotrichum boreale (Torr. & A. Gray) Á. Löve & D. Löve SYBO2northern bog aster · Asteraceae -
Symphyotrichum defoliatum (Parish) G.L. Nesom SYDESan Bernardino aster · Asteraceae -
Symphyotrichum divaricatum (Nutt.) G.L. Nesom SYDI2southern annual saltmarsh aster · Asteraceae