Kansas

• Allen 20001
  804 taxa Open ↗
• Anderson 20003
  874 taxa Open ↗
• Atchison 20005
  856 taxa Open ↗
• Barber 20007
  771 taxa Open ↗
• Barton 20009
  1,489 taxa Open ↗
• Bourbon 20011
  976 taxa Open ↗
• Brown 20013
  727 taxa Open ↗
• Butler 20015
  646 taxa Open ↗
• Chase 20017
  662 taxa Open ↗
• Chautauqua 20019
  883 taxa Open ↗

Showing 1,501–1,550 of 2,381 (native).

• 
  Oligoneuron rigidum (L.) Small var. rigidum Native OLRIR

  stiff goldenrod · Asteraceae 75 counties
• 
  Onoclea sensibilis L. Native ONSE

  sensitive fern · Dryopteridaceae 15 counties
• 
  Onosmodium bejariense DC. ex A. DC. Native ONBE

  soft-hair marbleseed · Boraginaceae 58 counties
• 
  Onosmodium bejariense DC. ex A. DC. var. hispidissimum (Mack.) B.L. Turner Native ONBEH

  softhair marbleseed · Boraginaceae 2 counties
• 
  Onosmodium bejariense DC. ex A. DC. var. occidentale (Mack.) B.L. Turner Native ONBEO

  western marbleseed · Boraginaceae 58 counties
• 
  Oonopsis engelmannii (A. Gray) Greene Native OOEN

  Engelmann's false goldenweed · Asteraceae 1 county
• 
  Ophioglossum engelmannii Prantl Native OPEN

  limestone adderstongue · Ophioglossaceae 22 counties
• 
  Opuntia fragilis (Nutt.) Haw. Native OPFR

  brittle pricklypear · Cactaceae 18 counties
• 
  Opuntia humifusa (Raf.) Raf. Native OPHU

  devil's-tongue · Cactaceae 2 counties
• 
  Opuntia macrorhiza Engelm. Native OPMA2

  twistspine pricklypear · Cactaceae 93 counties
• 
  Opuntia macrorhiza Engelm. var. macrorhiza Native OPMAM3

  twistspine pricklypear · Cactaceae 93 counties
• 
  Opuntia phaeacantha Engelm. Native OPPH

  tulip pricklypear · Cactaceae 1 county
• 
  Opuntia polyacantha Haw. Native OPPO

  plains pricklypear · Cactaceae 10 counties
• 
  Opuntia polyacantha Haw. var. polyacantha Native OPPOP

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

  Sampson's snakeroot · Fabaceae 6 counties
• 
  Orbexilum pedunculatum (Mill.) Rydb. var. pedunculatum Native ORPEP2

  Sampson's snakeroot · Fabaceae 6 counties
• 
  Orobanche fasciculata Nutt. Native ORFA

  clustered broomrape · Orobanchaceae 2 counties
• 
  Orobanche ludoviciana Nutt. Native ORLU

  Louisiana broomrape · Orobanchaceae 22 counties
• 
  Orobanche ludoviciana Nutt. ssp. multiflora (Nutt.) T.S. Collins ex H.L. White & W.C. Holmes Native ORLUM

  manyflower broomrape · Orobanchaceae 1 county
• 
  Orobanche riparia L.T. Collins Native ORRI

  River Broom-Rape · Orobanchaceae 3 counties
• 
  Orobanche uniflora L. Native ORUN

  oneflowered broomrape · Orobanchaceae 17 counties
• 
  Osmorhiza claytonii (Michx.) C.B. Clarke Native OSCL

  Clayton's sweetroot · Apiaceae 5 counties
• 
  Osmorhiza longistylis (Torr.) DC. Native OSLO

  longstyle sweetroot · Apiaceae 27 counties
• 
  Osmunda cinnamomea L. Native OSCI

  cinnamon fern · Osmundaceae 1 county
• 
  Osmunda cinnamomea L. var. cinnamomea Native OSCIC

  cinnamon fern · Osmundaceae 1 county
• 
  Osmunda claytoniana L. Native OSCL2

  interrupted fern · Osmundaceae 1 county
• 
  Osmunda regalis L. Native OSRE

  royal fern · Osmundaceae 3 counties
• 
  Osmunda regalis L. var. spectabilis (Willd.) A. Gray Native OSRES

  royal fern · Osmundaceae 3 counties
• 
  Ostrya virginiana (Mill.) K. Koch Native OSVI

  hophornbeam · Betulaceae 27 counties
• 
  Oxalis corniculata L. Native OXCO

  creeping woodsorrel · Oxalidaceae 1 county
• 
  Oxalis dillenii Jacq. Native OXDI2

  slender yellow woodsorrel · Oxalidaceae 74 counties
• 
  Oxalis stricta L. Native OXST

  common yellow oxalis · Oxalidaceae 71 counties
• 
  Oxalis violacea L. Native OXVI

  violet woodsorrel · Oxalidaceae 65 counties
• 
  Oxypolis rigidior (L.) Raf. Native OXRI

  stiff cowbane · Apiaceae 1 county
• 
  Oxytropis lambertii Pursh Native OXLA3

  purple locoweed · Fabaceae 54 counties
• 
  Oxytropis lambertii Pursh var. bigelovii A. Gray Native OXLAB

  purple locoweed · Fabaceae 1 county
• 
  Oxytropis sericea Nutt. Native OXSE

  white locoweed · Fabaceae 15 counties
• 
  Oxytropis sericea Nutt. var. sericea Native OXSES

  white locoweed · Fabaceae 15 counties
• 
  Packera aurea (L.) Á. Löve & D. Löve Native PAAU3

  golden ragwort · Asteraceae 1 county
• 
  Packera cana (Hook.) W.A. Weber & Á. Löve Native PACA15

  woolly groundsel · Asteraceae 1 county
• 
  Packera glabella (Poir.) C. Jeffrey Native PAGL17

  butterweed · Asteraceae 13 counties
• 
  Packera obovata (Muhl. ex Willd.) W.A. Weber & Á. Löve Native PAOB6

  roundleaf ragwort · Asteraceae 19 counties
• 
  Packera plattensis (Nutt.) W.A. Weber & Á. Löve Native PAPL12

  prairie groundsel · Asteraceae 84 counties
• 
  Packera pseudaurea (Rydb.) W.A. Weber & Á. Löve Native PAPS5

  falsegold groundsel · Asteraceae 4 counties
• 
  Packera pseudaurea (Rydb.) W.A. Weber & Á. Löve var. semicordata (Mack. & Bush) D.K. Trock & T.M. Barkley Native PAPSS

  falsegold groundsel · Asteraceae 4 counties
• 
  Packera tampicana (DC.) C. Jeffrey Native PATA5

  Great Plains ragwort · Asteraceae 1 county
• 
  Packera tridenticulata (Rydb.) W.A. Weber & Á. Löve Native PATR7

  threetooth ragwort · Asteraceae 5 counties
• 
  Palafoxia sphacelata (Nutt. ex Torr.) Cory Native PASP

  othake · Asteraceae 12 counties
• 
  Panax quinquefolius L. Native PAQU

  American ginseng · Araliaceae 1 county
• 
  Panicum anceps Michx. Native PAAN

  beaked panicgrass · Poaceae 10 counties