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 2,551–2,600 of 2,768.

• 
  Thaspium trifoliatum (L.) A. Gray Native THTR

  purple meadowparsnip · Apiaceae 4 counties
• 
  Thaspium trifoliatum (L.) A. Gray var. aureum (L.) Britton Native THTRA

  purple meadowparsnip · Apiaceae 4 counties
• 
  Thelesperma filifolium (Hook.) A. Gray Native THFI

  stiff greenthread · Asteraceae 38 counties
• 
  Thelesperma filifolium (Hook.) A. Gray var. filifolium Native THFIF

  stiff greenthread · Asteraceae 26 counties
• 
  Thelesperma filifolium (Hook.) A. Gray var. intermedium (Rydb.) Shinners Native THFII

  stiff greenthread · Asteraceae 15 counties
• 
  Thelesperma megapotamicum (Spreng.) Kuntze Native THME

  Hopi tea greenthread · Asteraceae 21 counties
• 
  Thelypodium wrightii A. Gray Native THWR

  Wright's thelypody · Brassicaceae 1 county
• 
  Thelypodium wrightii A. Gray ssp. oklahomense Al-Shehbaz Native THWRO

  Oklahoma thelypody · Brassicaceae 1 county
• 
  Thelypteris palustris Schott Native THPA

  eastern marsh fern · Thelypteridaceae 1 county
• 
  Thelypteris palustris Schott var. pubescens (G. Lawson) Fernald Native THPAP

  eastern marsh fern · Thelypteridaceae 1 county
• 
  Thlaspi arvense L. Introduced THAR5

  field pennycress · Brassicaceae 6 counties
• 
  Tidestromia lanuginosa (Nutt.) Standl. Native TILA2

  woolly tidestromia · Amaranthaceae 9 counties
• 
  Tilia americana L. Native TIAM

  American basswood · Tiliaceae 5 counties
• 
  Tipularia discolor (Pursh) Nutt. Native TIDI

  crippled cranefly · Orchidaceae 4 counties
• 
  Torilis arvensis (Huds.) Link Introduced TOAR

  spreading hedgeparsley · Apiaceae 19 counties
• 
  Torilis arvensis (Huds.) Link ssp. arvensis Introduced TOARA

  spreading hedgeparsley · Apiaceae 19 counties
• 
  Torilis nodosa (L.) Gaertn. Introduced TONO

  knotted hedgeparsley · Apiaceae 1 county
• 
  Townsendia exscapa (Richardson) Porter Native TOEX2

  stemless Townsend daisy · Asteraceae 11 counties
• 
  Townsendia texensis Larsen Native TOTE2

  Texas Townsend daisy · Asteraceae 2 counties
• 
  Toxicodendron pubescens Mill. Native TOPU2

  Atlantic poison oak · Anacardiaceae 5 counties
• 
  Toxicodendron radicans (L.) Kuntze Native TORA2

  eastern poison ivy · Anacardiaceae 23 counties
• 
  Toxicodendron radicans (L.) Kuntze ssp. negundo (Greene) Gillis Native TORAN

  eastern poison ivy · Anacardiaceae 20 counties
• 
  Toxicodendron radicans (L.) Kuntze ssp. verrucosum (Scheele) Gillis Native TORAV

  eastern poison ivy · Anacardiaceae 2 counties
• 
  Toxicodendron rydbergii (Small ex Rydb.) Greene Native TORY

  western poison ivy · Anacardiaceae 1 county
• 
  Tradescantia bracteata Small Native TRBR

  longbract spiderwort · Commelinaceae 7 counties
• 
  Tradescantia ernestiana E.S. Anderson & Woodson Native TRER4

  Ernest's spiderwort · Commelinaceae 1 county
• 
  Tradescantia occidentalis (Britton) Smyth Native TROC

  prairie spiderwort · Commelinaceae 39 counties
• 
  Tradescantia ohiensis Raf. Native TROH

  bluejacket · Commelinaceae 39 counties
• 
  Tradescantia tharpii E.S. Anderson & Woodson Native TRTH

  Tharp's spiderwort · Commelinaceae 12 counties
• 
  Tragia betonicifolia Nutt. Native TRBE4

  betonyleaf noseburn · Euphorbiaceae 14 counties
• 
  Tragia cordata Michx. Native TRCO

  heartleaf noseburn · Euphorbiaceae 1 county
• 
  Tragia ramosa Torr. Native TRRA5

  branched noseburn · Euphorbiaceae 13 counties
• 
  Tragopogon dubius Scop. Introduced TRDU

  yellow salsify · Asteraceae 20 counties
• 
  Tragopogon porrifolius L. Introduced TRPO

  salsify · Asteraceae 5 counties
• 
  Trepocarpus aethusae Nutt. ex DC. Native TRAE2

  whitenymph · Apiaceae 1 county
• 
  Trianthema portulacastrum L. Native TRPO2

  desert horsepurslane · Aizoaceae 1 county
• 
  Tribulus terrestris L. Introduced TRTE

  puncturevine · Zygophyllaceae 36 counties
• 
  Trichostema brachiatum L. Native TRBR5

  fluxweed · Lamiaceae 8 counties
• 
  Trichostema dichotomum L. Native TRDI2

  forked bluecurls · Lamiaceae 1 county
• 
  Tridens albescens (Vasey) Wooton & Standl. Native TRAL2

  white tridens · Poaceae 19 counties
• 
  Tridens flavus (L.) Hitchc. Native TRFL2

  purpletop tridens · Poaceae 37 counties
• 
  Tridens flavus (L.) Hitchc. var. flavus Native TRFLF

  purpletop tridens · Poaceae 1 county
• 
  Tridens muticus (Torr.) Nash Native TRMU

  slim tridens · Poaceae 19 counties
• 
  Tridens strictus (Nutt.) Nash Native TRST2

  longspike tridens · Poaceae 25 counties
• 
  Trifolium arvense L. Introduced TRAR4

  rabbitfoot clover · Fabaceae 1 county
• 
  Trifolium campestre Schreb. Introduced TRCA5

  field clover · Fabaceae 11 counties
• 
  Trifolium carolinianum Michx. Native TRCA6

  Carolina clover · Fabaceae 1 county
• 
  Trifolium dubium Sibth. Introduced TRDU2

  suckling clover · Fabaceae 12 counties
• 
  Trifolium hybridum L. Introduced TRHY

  alsike clover · Fabaceae 5 counties
• 
  Trifolium incarnatum L. Introduced TRIN3

  crimson clover · Fabaceae 1 county