North Dakota

• Adams 38001
  197 taxa Open ↗
• Barnes 38003
  892 taxa Open ↗
• Benson 38005
  669 taxa Open ↗
• Billings 38007
  753 taxa Open ↗
• Bottineau 38009
  704 taxa Open ↗
• Bowman 38011
  451 taxa Open ↗
• Burke 38013
  732 taxa Open ↗
• Burleigh 38015
  560 taxa Open ↗
• Cass 38017
  923 taxa Open ↗
• Cavalier 38019
  472 taxa Open ↗

Showing 1,051–1,100 of 1,677.

• 
  Oenothera suffrutescens (Ser.) W.L. Wagner & Hoch Native OESU3

  scarlet beeblossom · Onagraceae 43 counties
• 
  Oenothera villosa Thunb. Native OEVI

  hairy evening primrose · Onagraceae 33 counties
• 
  Oenothera villosa Thunb. ssp. villosa Native OEVIV

  hairy evening primrose · Onagraceae 33 counties
• 
  Oligoneuron album (Nutt.) G.L. Nesom Native OLAL2

  prairie goldenrod · Asteraceae 39 counties
• 
  Oligoneuron riddellii (Frank ex Riddell) Rydb. Native OLRI2

  Riddell's goldenrod · Asteraceae 1 county
• 
  Oligoneuron rigidum (L.) Small Native OLRI

  stiff goldenrod · Asteraceae 47 counties
• 
  Oligoneuron rigidum (L.) Small var. humile (Porter) G.L. Nesom Native OLRIH

  stiff goldenrod · Asteraceae 47 counties
• 
  Onoclea sensibilis L. Native ONSE

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

  soft-hair marbleseed · Boraginaceae 31 counties
• 
  Onosmodium bejariense DC. ex A. DC. var. occidentale (Mack.) B.L. Turner Native ONBEO

  western marbleseed · Boraginaceae 31 counties
• 
  Ophioglossum pusillum Raf. Native OPPU3

  northern adderstongue · Ophioglossaceae 1 county
• 
  Opuntia fragilis (Nutt.) Haw. Native OPFR

  brittle pricklypear · Cactaceae 14 counties
• 
  Opuntia polyacantha Haw. Native OPPO

  plains pricklypear · Cactaceae 18 counties
• 
  Opuntia polyacantha Haw. var. polyacantha Native OPPOP

  hairspine pricklypear · Cactaceae 18 counties
• 
  Orobanche fasciculata Nutt. Native ORFA

  clustered broomrape · Orobanchaceae 18 counties
• 
  Orobanche ludoviciana Nutt. Native ORLU

  Louisiana broomrape · Orobanchaceae 17 counties
• 
  Orobanche ludoviciana Nutt. ssp. ludoviciana Native ORLUL2

  Louisiana broomrape · Orobanchaceae 17 counties
• 
  Orobanche uniflora L. Native ORUN

  oneflowered broomrape · Orobanchaceae 1 county
• 
  Orthilia secunda (L.) House Native ORSE

  sidebells wintergreen · Pyrolaceae 8 counties
• 
  Orthocarpus luteus Nutt. Native ORLU2

  yellow owl's-clover · Scrophulariaceae 39 counties
• 
  Oryzopsis asperifolia Michx. Native ORAS

  roughleaf ricegrass · Poaceae 10 counties
• 
  Osmorhiza claytonii (Michx.) C.B. Clarke Native OSCL

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

  longstyle sweetroot · Apiaceae 33 counties
• 
  Ostrya virginiana (Mill.) K. Koch Native OSVI

  hophornbeam · Betulaceae 10 counties
• 
  Oxalis dillenii Jacq. Native OXDI2

  slender yellow woodsorrel · Oxalidaceae 8 counties
• 
  Oxalis stricta L. Native OXST

  common yellow oxalis · Oxalidaceae 32 counties
• 
  Oxalis violacea L. Native OXVI

  violet woodsorrel · Oxalidaceae 8 counties
• 
  Oxytropis deflexa (Pall.) DC. Native OXDE2

  nodding locoweed · Fabaceae 3 counties
• 
  Oxytropis deflexa (Pall.) DC. var. sericea Torr. & A. Gray Native OXDES

  blue nodding locoweed · Fabaceae 3 counties
• 
  Oxytropis lambertii Pursh Native OXLA3

  purple locoweed · Fabaceae 40 counties
• 
  Oxytropis lambertii Pursh var. lambertii Native OXLAL2

  purple locoweed · Fabaceae 40 counties
• ⚘
  Oxytropis monticola A. Gray Native OXMO2

  yellowflower locoweed · Fabaceae 21 counties
• 
  Oxytropis splendens Douglas ex Hook. Native OXSP

  showy locoweed · Fabaceae 14 counties
• 
  Packera cana (Hook.) W.A. Weber & Á. Löve Native PACA15

  woolly groundsel · Asteraceae 32 counties
• 
  Packera paupercula (Michx.) Á. Löve & D. Löve Native PAPA20

  balsam groundsel · Asteraceae 5 counties
• 
  Packera plattensis (Nutt.) W.A. Weber & Á. Löve Native PAPL12

  prairie groundsel · Asteraceae 34 counties
• 
  Packera pseudaurea (Rydb.) W.A. Weber & Á. Löve Native PAPS5

  falsegold groundsel · Asteraceae 17 counties
• 
  Packera pseudaurea (Rydb.) W.A. Weber & Á. Löve var. semicordata (Mack. & Bush) D.K. Trock & T.M. Barkley Native PAPSS

  falsegold groundsel · Asteraceae 17 counties
• 
  Packera tridenticulata (Rydb.) W.A. Weber & Á. Löve Native PATR7

  threetooth ragwort · Asteraceae 4 counties
• 
  Panicum capillare L. Native PACA6

  witchgrass · Poaceae 40 counties
• 
  Panicum miliaceum L. Introduced PAMI2

  proso millet · Poaceae 10 counties
• 
  Panicum miliaceum L. ssp. miliaceum Introduced PAMIM

  broomcorn millet · Poaceae 10 counties
• 
  Panicum virgatum L. Native PAVI2

  switchgrass · Poaceae 34 counties
• 
  Panicum virgatum L. var. virgatum Native PAVIV

  switchgrass · Poaceae 34 counties
• 
  Parietaria pensylvanica Muhl. ex Willd. Native PAPE5

  Pennsylvania pellitory · Urticaceae 36 counties
• 
  Parnassia glauca Raf. Native PAGL3

  fen grass of Parnassus · Saxifragaceae 7 counties
• 
  Parnassia palustris L. Native PAPA8

  marsh grass of Parnassus · Saxifragaceae 16 counties
• 
  Parnassia palustris L. var. parviflora (DC.) B. Boivin Native PAPAP2

  smallflower grass of Parnassus · Saxifragaceae 1 county
• 
  Paronychia sessiliflora Nutt. Native PASE

  creeping nailwort · Caryophyllaceae 18 counties
• 
  Parthenocissus vitacea (Knerr) Hitchc. Native PAVI5

  woodbine · Vitaceae 29 counties