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 2,601–2,650 of 2,768.

• 
  Trifolium pratense L. Introduced TRPR2

  red clover · Fabaceae 11 counties
• 
  Trifolium reflexum L. Native TRRE2

  buffalo clover · Fabaceae 12 counties
• 
  Trifolium repens L. Introduced TRRE3

  white clover · Fabaceae 13 counties
• 
  Trifolium resupinatum L. Introduced TRRE4

  reversed clover · Fabaceae 1 county
• 
  Trillium pusillum Michx. Native TRPU3

  dwarf wakerobin · Liliaceae 2 counties
• 
  Trillium pusillum Michx. var. ozarkanum (Palmer & Steyerm.) Steyerm. Native TRPUO

  Ozark wakerobin · Liliaceae 2 counties
• 
  Trillium recurvatum Beck Native TRRE5

  bloody butcher · Liliaceae 1 county
• 
  Trillium sessile L. Native TRSE2

  toadshade · Liliaceae 1 county
• 
  Trillium viridescens Nutt. Native TRVI5

  tapertip wakerobin · Liliaceae 2 counties
• 
  Triodanis biflora (Ruiz & Pav.) Greene Native TRBI2

  small Venus' looking-glass · Campanulaceae 19 counties
• 
  Triodanis holzingeri McVaugh Native TRHO2

  Holzinger's Venus' looking-glass · Campanulaceae 15 counties
• 
  Triodanis leptocarpa (Nutt.) Nieuwl. Native TRLE3

  slimpod Venus' looking-glass · Campanulaceae 21 counties
• 
  Triodanis perfoliata (L.) Nieuwl. Native TRPE4

  clasping Venus' looking-glass · Campanulaceae 36 counties
• 
  Triosteum angustifolium L. Native TRAN3

  yellowfruit horse-gentian · Caprifoliaceae 1 county
• 
  Triosteum aurantiacum E.P. Bicknell Native TRAU4

  orangefruit horse-gentian · Caprifoliaceae 3 counties
• 
  Triosteum aurantiacum E.P. Bicknell var. illinoense (Wiegand) Palmer & Steyerm. Native TRAUI

  Illinois horse-gentian · Caprifoliaceae 3 counties
• 
  Triosteum perfoliatum L. Native TRPE5

  feverwort · Caprifoliaceae 7 counties
• 
  Triphora trianthophora (Sw.) Rydb. Native TRTR3

  threebirds · Orchidaceae 10 counties
• 
  Triplasis purpurea (Walter) Chapm. Native TRPU4

  purple sandgrass · Poaceae 11 counties
• 
  Tripsacum dactyloides (L.) L. Native TRDA3

  eastern gamagrass · Poaceae 28 counties
• 
  Trisetum interruptum Buckley Native TRIN5

  prairie false oat · Poaceae 4 counties
• 
  Triticum aestivum L. Introduced TRAE

  common wheat · Poaceae 1 county
• 
  Typha angustifolia L. Both TYAN

  narrowleaf cattail · Typhaceae 2 counties
• 
  Typha domingensis Pers. Native TYDO

  southern cattail · Typhaceae 14 counties
• 
  Typha latifolia L. Native TYLA

  broadleaf cattail · Typhaceae 20 counties
• 
  Ulmus alata Michx. Native ULAL

  winged elm · Ulmaceae 34 counties
• 
  Ulmus americana L. Native ULAM

  American elm · Ulmaceae 73 counties
• 
  Ulmus crassifolia Nutt. Native ULCR

  cedar elm · Ulmaceae 18 counties
• 
  Ulmus parvifolia Jacq. Introduced ULPA

  Chinese elm · Ulmaceae 13 counties
• 
  Ulmus pumila L. Introduced ULPU

  Siberian elm · Ulmaceae 34 counties
• 
  Ulmus rubra Muhl. Native ULRU

  slippery elm · Ulmaceae 62 counties
• 
  Ulmus serotina Sarg. Native ULSE

  September elm · Ulmaceae 6 counties
• 
  Urochloa fusca (Sw.) B.F. Hansen & Wunderlin Native URFU2

  browntop signalgrass · Poaceae 2 counties
• 
  Urochloa platyphylla (Munro ex C. Wright) R.D. Webster Native URPL2

  broadleaf signalgrass · Poaceae 1 county
• 
  Urochloa ramosa (L.) Nguyen Introduced URRA

  Poaceae 1 county
• 
  Urochloa texana (Buckley) R. Webster Native URTE2

  Texas signalgrass · Poaceae 9 counties
• 
  Urtica chamaedryoides Pursh Native URCH3

  heartleaf nettle · Urticaceae 4 counties
• 
  Urtica dioica L. Both URDI

  stinging nettle · Urticaceae 1 county
• 
  Urtica dioica L. ssp. gracilis (Aiton) Seland. Native URDIG

  California nettle · Urticaceae 1 county
• 
  Utricularia gibba L. Native UTGI

  humped bladderwort · Lentibulariaceae 6 counties
• 
  Utricularia macrorhiza Leconte Native UTMA

  common bladderwort · Lentibulariaceae 2 counties
• 
  Uvularia grandiflora Sm. Native UVGR

  largeflower bellwort · Liliaceae 4 counties
• 
  Uvularia sessilifolia L. Native UVSE

  sessileleaf bellwort · Liliaceae 1 county
• 
  Vaccinium arboreum Marshall Native VAAR

  farkleberry · Ericaceae 1 county
• 
  Vaccinium pallidum Aiton Native VAPA4

  Blue Ridge blueberry · Ericaceae 1 county
• 
  Vaccinium stamineum L. Native VAST

  deerberry · Ericaceae 3 counties
• 
  Valerianella amarella (Lindh. ex Engelm.) Krok Native VAAM2

  hairy cornsalad · Valerianaceae 5 counties
• 
  Valerianella longiflora (Torr. & A. Gray) Walp. Native VALO2

  longtube cornsalad · Valerianaceae 1 county
• 
  Valerianella radiata (L.) Dufr. Native VARA

  beaked cornsalad · Valerianaceae 37 counties
• 
  Venturiella sinensis (Vent.) Müll. Hal. Native VESI5

  China venturiella moss · Erpodiaceae 5 counties