Oklahoma

• Adair 40001
  462 taxa Open ↗
• Alfalfa 40003
  443 taxa Open ↗
• Atoka 40005
  275 taxa Open ↗
• Beaver 40007
  382 taxa Open ↗
• Beckham 40009
  298 taxa Open ↗
• Blaine 40011
  437 taxa Open ↗
• Bryan 40013
  935 taxa Open ↗
• Caddo 40015
  574 taxa Open ↗
• Canadian 40017
  444 taxa Open ↗
• Carter 40019
  424 taxa Open ↗

Showing 2,251–2,300 of 2,768.

• 
  Salix nigra Marshall Native SANI

  black willow · Salicaceae 46 counties
• 
  Salsola tragus L. Introduced SATR12

  prickly Russian thistle · Chenopodiaceae 19 counties
• 
  Salvia azurea Michx. ex Lam. Native SAAZ

  azure blue sage · Lamiaceae 50 counties
• 
  Salvia azurea Michx. ex Lam. var. grandiflora Benth. Native SAAZG

  pitcher sage · Lamiaceae 50 counties
• 
  Salvia lyrata L. Native SALY2

  lyreleaf sage · Lamiaceae 1 county
• 
  Salvia reflexa Hornem. Native SARE3

  lanceleaf sage · Lamiaceae 10 counties
• 
  Sambucus nigra L. Both SANI4

  black elderberry · Caprifoliaceae 28 counties
• 
  Sambucus nigra L. ssp. canadensis (L.) R. Bolli Native SANIC4

  American black elderberry · Caprifoliaceae 28 counties
• 
  Samolus valerandi L. Both SAVA3

  seaside brookweed · Primulaceae 28 counties
• 
  Samolus valerandi L. ssp. parviflorus (Raf.) Hultén Native SAVAP

  seaside brookweed · Primulaceae 28 counties
• 
  Sanguinaria canadensis L. Native SACA13

  bloodroot · Papaveraceae 9 counties
• 
  Sanguisorba annua (Nutt. ex Hook.) Nutt. ex Torr. & A. Gray Native SAAN2

  prairie burnet · Rosaceae 4 counties
• 
  Sanicula canadensis L. Native SACA15

  Canadian blacksnakeroot · Apiaceae 30 counties
• 
  Sanicula canadensis L. var. canadensis Native SACAC2

  Canadian blacksnakeroot · Apiaceae 30 counties
• 
  Sanicula odorata (Raf.) K.M. Pryer & L.R. Phillippe Native SAOD

  clustered blacksnakeroot · Apiaceae 7 counties
• 
  Sapindus saponaria L. Native SASA4

  wingleaf soapberry · Sapindaceae 33 counties
• 
  Sapindus saponaria L. var. drummondii (Hook. & Arn.) L.D. Benson Native SASAD

  western soapberry · Sapindaceae 33 counties
• 
  Saponaria officinalis L. Introduced SAOF4

  bouncingbet · Caryophyllaceae 5 counties
• 
  Sassafras albidum (Nutt.) Nees Native SAAL5

  sassafras · Lauraceae 4 counties
• 
  Saururus cernuus L. Native SACE

  lizard's tail · Saururaceae 3 counties
• 
  Saxifraga palmeri Bush Native SAPA13

  Palmer's saxifrage · Saxifragaceae 1 county
• 
  Saxifraga texana Buckley Native SATE4

  Texas saxifrage · Saxifragaceae 2 counties
• 
  Schedonnardus paniculatus (Nutt.) Trel. Native SCPA

  tumblegrass · Poaceae 30 counties
• 
  Schedonorus arundinaceus (Schreb.) Dumort., nom. cons. Introduced SCAR7

  tall fescue · Poaceae 1 county
• 
  Schedonorus pratensis (Huds.) P. Beauv. Introduced SCPR4

  meadow fescue · Poaceae 9 counties
• 
  Schizachyrium scoparium (Michx.) Nash Native SCSC

  little bluestem · Poaceae 41 counties
• 
  Schizachyrium scoparium (Michx.) Nash var. scoparium Native SCSCS

  little bluestem · Poaceae 41 counties
• 
  Schoenoplectiella hallii (A.Gray) Lye Native SCHA10

  Hall's bulrush · Cyperaceae 2 counties
• ⚘
  Schoenoplectiella ×magrathii F.M. Sm. & P.M. McKenzie [hallii × saximontana] Native SCMA11

  Magrath's bulrush · Cyperaceae 1 county
• 
  Schoenoplectus acutus (Muhl. ex Bigelow) Á. Löve & D. Löve Native SCAC3

  hardstem bulrush · Cyperaceae 12 counties
• 
  Schoenoplectus acutus (Muhl. ex Bigelow) Á. Löve & D. Löve var. acutus Native SCACA

  hardstem bulrush · Cyperaceae 12 counties
• 
  Schoenoplectus americanus (Pers.) Volkart ex Schinz & R. Keller Native SCAM6

  chairmaker's bulrush · Cyperaceae 24 counties
• 
  Schoenoplectus pungens (Vahl) Palla Native SCPU10

  common threesquare · Cyperaceae 1 county
• 
  Schoenoplectus pungens (Vahl) Palla var. pungens Native SCPUP5

  common threesquare · Cyperaceae 1 county
• 
  Schoenoplectus tabernaemontani (C.C. Gmel.) Palla Native SCTA2

  softstem bulrush · Cyperaceae 10 counties
• 
  Scirpus atrovirens Willd. Native SCAT2

  green bulrush · Cyperaceae 11 counties
• 
  Scirpus georgianus Harper Native SCGE2

  Georgia bulrush · Cyperaceae 1 county
• 
  Scirpus pallidus (Britton) Fernald Native SCPA8

  cloaked bulrush · Cyperaceae 2 counties
• 
  Scirpus pendulus Muhl. Native SCPE4

  rufous bulrush · Cyperaceae 18 counties
• 
  Scleranthus annuus L. Introduced SCAN2

  German knotgrass · Caryophyllaceae 2 counties
• 
  Scleria ciliata Michx. Native SCCI

  fringed nutrush · Cyperaceae 15 counties
• 
  Scleria ciliata Michx. var. ciliata Native SCCIC

  fringed nutrush · Cyperaceae 1 county
• 
  Scleria oligantha Michx. Native SCOL2

  littlehead nutrush · Cyperaceae 1 county
• 
  Scleria pauciflora Muhl. ex Willd. Native SCPA5

  fewflower nutrush · Cyperaceae 7 counties
• 
  Scleria triglomerata Michx. Native SCTR

  whip nutrush · Cyperaceae 6 counties
• 
  Sclerochloa dura (L.) P. Beauv. Introduced SCDU2

  common hardgrass · Poaceae 6 counties
• 
  Scleropogon brevifolius Phil. Native SCBR2

  burrograss · Poaceae 1 county
• 
  Scrophularia lanceolata Pursh Native SCLA

  lanceleaf figwort · Scrophulariaceae 4 counties
• 
  Scrophularia marilandica L. Native SCMA2

  carpenter's square · Scrophulariaceae 7 counties
• 
  Scutellaria drummondii Benth. Native SCDR2

  Drummond's skullcap · Lamiaceae 16 counties