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 1,701–1,750 of 2,768.

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  Oenothera engelmannii (Small) Munz Native OEEN

  Engelmann's evening primrose · Onagraceae 1 county
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  Oenothera filiformis (Small) W.L. Wagner & Hoch Native OEFI2

  longflower beeblossom · Onagraceae 25 counties
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  Oenothera fruticosa L. Native OEFR

  narrowleaf evening primrose · Onagraceae 1 county
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  Oenothera fruticosa L. ssp. fruticosa Native OEFRF

  narrowleaf evening primrose · Onagraceae 1 county
• 
  Oenothera grandis (Britton) Smyth Native OEGR2

  showy evening primrose · Onagraceae 24 counties
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  Oenothera jamesii Torr. & A. Gray Native OEJA

  trumpet evening primrose · Onagraceae 8 counties
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  Oenothera laciniata Hill Native OELA

  cutleaf evening primrose · Onagraceae 54 counties
• ⚘
  Oenothera latifolia (Rydb.) Munz Native OELA2

  mountain evening primrose · Onagraceae 5 counties
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  Oenothera linifolia Nutt. Native OELI

  threadleaf evening primrose · Onagraceae 29 counties
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  Oenothera macrocarpa Nutt. Native OEMA

  bigfruit evening primrose · Onagraceae 30 counties
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  Oenothera macrocarpa Nutt. ssp. incana (A. Gray) Wagner Native OEMAI2

  bigfruit evening primrose · Onagraceae 10 counties
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  Oenothera macrocarpa Nutt. ssp. macrocarpa Native OEMAM

  bigfruit evening primrose · Onagraceae 5 counties
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  Oenothera macrocarpa Nutt. ssp. oklahomensis (J.B.S. Norton) Wagner Native OEMAO2

  Oklahoma evening primrose · Onagraceae 21 counties
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  Oenothera rhombipetala Nutt. ex Torr. & A. Gray Native OERH

  fourpoint evening primrose · Onagraceae 31 counties
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  Oenothera sinuosa W.L. Wagner & Hoch Native OESI3

  wavyleaf beeblossom · Onagraceae 28 counties
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  Oenothera speciosa Nutt. Native OESP2

  pinkladies · Onagraceae 43 counties
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  Oenothera suffrutescens (Ser.) W.L. Wagner & Hoch Native OESU3

  scarlet beeblossom · Onagraceae 25 counties
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  Oenothera suffulta (Engelm. ex A. Gray) W.L. Wagner & Hoch Native OESU4

  kisses · Onagraceae 14 counties
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  Oenothera suffulta (Engelm. ex A. Gray) W.L. Wagner & Hoch ssp. suffulta Native OESUS

  kisses · Onagraceae 14 counties
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  Oenothera triangulata (Buckley) W.L. Wagner & Hoch Native OETR

  prairie beeblossom · Onagraceae 8 counties
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  Oenothera triloba Nutt. Native OETR2

  stemless evening primrose · Onagraceae 27 counties
• 
  Oenothera villosa Thunb. Native OEVI

  hairy evening primrose · Onagraceae 3 counties
• 
  Oenothera villosa Thunb. ssp. villosa Native OEVIV

  hairy evening primrose · Onagraceae 3 counties
• 
  Oligoneuron album (Nutt.) G.L. Nesom Native OLAL2

  prairie goldenrod · Asteraceae 1 county
• 
  Oligoneuron rigidum (L.) Small Native OLRI

  stiff goldenrod · Asteraceae 19 counties
• 
  Oligoneuron rigidum (L.) Small var. rigidum Native OLRIR

  stiff goldenrod · Asteraceae 19 counties
• 
  Onoclea sensibilis L. Native ONSE

  sensitive fern · Dryopteridaceae 3 counties
• 
  Onosmodium bejariense DC. ex A. DC. Native ONBE

  soft-hair marbleseed · Boraginaceae 16 counties
• 
  Onosmodium bejariense DC. ex A. DC. var. bejariense Native ONBEB

  soft-hair marbleseed · Boraginaceae 16 counties
• 
  Onosmodium bejariense DC. ex A. DC. var. occidentale (Mack.) B.L. Turner Native ONBEO

  western marbleseed · Boraginaceae 16 counties
• 
  Onosmodium bejariense DC. ex A. DC. var. subsetosum (Mack. & Bush) B.L. Turner Native ONBES

  softhair marbleseed · Boraginaceae 1 county
• 
  Ophioglossum engelmannii Prantl Native OPEN

  limestone adderstongue · Ophioglossaceae 21 counties
• 
  Opuntia humifusa (Raf.) Raf. Native OPHU

  devil's-tongue · Cactaceae 1 county
• 
  Opuntia macrorhiza Engelm. Native OPMA2

  twistspine pricklypear · Cactaceae 6 counties
• 
  Opuntia macrorhiza Engelm. var. macrorhiza Native OPMAM3

  twistspine pricklypear · Cactaceae 6 counties
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  Opuntia phaeacantha Engelm. Native OPPH

  tulip pricklypear · Cactaceae 2 counties
• 
  Opuntia polyacantha Haw. Native OPPO

  plains pricklypear · Cactaceae 1 county
• 
  Orbexilum pedunculatum (Mill.) Rydb. Native ORPE

  Sampson's snakeroot · Fabaceae 3 counties
• 
  Orbexilum pedunculatum (Mill.) Rydb. var. pedunculatum Native ORPEP2

  Sampson's snakeroot · Fabaceae 3 counties
• 
  Ornithogalum umbellatum L. Introduced ORUM

  star of Bethlehem · Liliaceae 1 county
• 
  Orobanche fasciculata Nutt. Native ORFA

  clustered broomrape · Orobanchaceae 3 counties
• 
  Orobanche ludoviciana Nutt. Native ORLU

  Louisiana broomrape · Orobanchaceae 9 counties
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  Orobanche ludoviciana Nutt. ssp. multiflora (Nutt.) T.S. Collins ex H.L. White & W.C. Holmes Native ORLUM

  manyflower broomrape · Orobanchaceae 6 counties
• 
  Orobanche riparia L.T. Collins Native ORRI

  River Broom-Rape · Orobanchaceae 1 county
• 
  Orobanche uniflora L. Native ORUN

  oneflowered broomrape · Orobanchaceae 8 counties
• 
  Osmorhiza longistylis (Torr.) DC. Native OSLO

  longstyle sweetroot · Apiaceae 11 counties
• 
  Osmunda regalis L. Native OSRE

  royal fern · Osmundaceae 1 county
• 
  Osmunda regalis L. var. spectabilis (Willd.) A. Gray Native OSRES

  royal fern · Osmundaceae 1 county
• 
  Ostrya virginiana (Mill.) K. Koch Native OSVI

  hophornbeam · Betulaceae 10 counties
• 
  Oxalis corniculata L. Native OXCO

  creeping woodsorrel · Oxalidaceae 1 county