Montana

• Beaverhead 30001
  755 taxa Open ↗
• Big Horn 30003
  565 taxa Open ↗
• Blaine 30005
  333 taxa Open ↗
• Broadwater 30007
  359 taxa Open ↗
• Carbon 30009
  749 taxa Open ↗
• Carter 30011
  454 taxa Open ↗
• Cascade 30013
  768 taxa Open ↗
• Chouteau 30015
  423 taxa Open ↗
• Custer 30017
  458 taxa Open ↗
• Daniels 30019
  384 taxa Open ↗

Showing 1,651–1,700 of 2,720 (native).

• 
  Noccaea fendleri (A. Gray) Holub ssp. glauca (A. Nelson) Al-Shehbaz & M. Koch Native NOFEG

  alpine pennycress · Brassicaceae 9 counties
• 
  Noccaea parviflora (A. Nelson) Holub Native NOPA5

  meadow pennycress · Brassicaceae 2 counties
• 
  Nothocalais cuspidata (Pursh) Greene Native NOCU

  prairie false dandelion · Asteraceae 24 counties
• 
  Nothocalais nigrescens (L.F. Hend.) A. Heller Native NONI

  speckled false dandelion · Asteraceae 3 counties
• 
  Nuphar lutea (L.) Sm. Native NULU

  yellow pond-lily · Nymphaeaceae 11 counties
• 
  Nuphar lutea (L.) Sm. ssp. polysepala (Engelm.) E.O. Beal Native NULUP

  Rocky Mountain pond-lily · Nymphaeaceae 11 counties
• 
  Oenothera albicaulis Pursh Native OEAL

  whitest evening primrose · Onagraceae 19 counties
• 
  Oenothera biennis L. Native OEBI

  common evening primrose · Onagraceae 17 counties
• 
  Oenothera caespitosa Nutt. Native OECA10

  tufted evening primrose · Onagraceae 34 counties
• 
  Oenothera caespitosa Nutt. ssp. caespitosa Native OECAC2

  tufted evening primrose · Onagraceae 34 counties
• 
  Oenothera curtiflora W.L. Wagner & Hoch Native OECU2

  velvetweed · Onagraceae 21 counties
• 
  Oenothera flava (A. Nelson) Garrett Native OEFL

  yellow evening primrose · Onagraceae 6 counties
• 
  Oenothera flava (A. Nelson) Garrett ssp. flava Native OEFLF

  yellow evening primrose · Onagraceae 5 counties
• 
  Oenothera nuttallii Sweet Native OENU

  Nuttall's evening primrose · Onagraceae 17 counties
• 
  Oenothera pallida Lindl. Native OEPA

  pale evening primrose · Onagraceae 2 counties
• 
  Oenothera pallida Lindl. ssp. trichocalyx (Nutt.) Munz & W. Klein Native OEPAT

  pale evening primrose · Onagraceae 2 counties
• 
  Oenothera suffrutescens (Ser.) W.L. Wagner & Hoch Native OESU3

  scarlet beeblossom · Onagraceae 54 counties
• 
  Oenothera villosa Thunb. Native OEVI

  hairy evening primrose · Onagraceae 13 counties
• 
  Oenothera villosa Thunb. ssp. strigosa (Rydb.) W. Dietr. & P.H. Raven Native OEVIS

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

  hairy evening primrose · Onagraceae 9 counties
• 
  Oligoneuron album (Nutt.) G.L. Nesom Native OLAL2

  prairie goldenrod · Asteraceae 2 counties
• 
  Oligoneuron rigidum (L.) Small Native OLRI

  stiff goldenrod · Asteraceae 43 counties
• 
  Oligoneuron rigidum (L.) Small var. humile (Porter) G.L. Nesom Native OLRIH

  stiff goldenrod · Asteraceae 43 counties
• 
  Onosmodium bejariense DC. ex A. DC. Native ONBE

  soft-hair marbleseed · Boraginaceae 6 counties
• 
  Onosmodium bejariense DC. ex A. DC. var. occidentale (Mack.) B.L. Turner Native ONBEO

  western marbleseed · Boraginaceae 6 counties
• 
  Oonopsis multicaulis (Nutt.) Greene Native OOMU

  branched false goldenweed · Asteraceae 1 county
• 
  Oplopanax horridus (Sm.) Miq. Native OPHO

  devilsclub · Araliaceae 6 counties
• 
  Opuntia fragilis (Nutt.) Haw. Native OPFR

  brittle pricklypear · Cactaceae 7 counties
• 
  Opuntia polyacantha Haw. Native OPPO

  plains pricklypear · Cactaceae 26 counties
• 
  Opuntia polyacantha Haw. var. polyacantha Native OPPOP

  hairspine pricklypear · Cactaceae 26 counties
• 
  Oreostemma alpigenum (Torr. & A. Gray) Greene Native ORAL4

  tundra aster · Asteraceae 8 counties
• 
  Oreostemma alpigenum (Torr. & A. Gray) Greene var. haydenii (Porter) G.L. Nesom Native ORALH

  tundra aster · Asteraceae 8 counties
• 
  Orobanche corymbosa (Rydb.) Ferris Native ORCO5

  flat-top broomrape · Orobanchaceae 1 county
• 
  Orobanche corymbosa (Rydb.) Ferris ssp. corymbosa Native ORCOC3

  flat-top broomrape · Orobanchaceae 1 county
• 
  Orobanche fasciculata Nutt. Native ORFA

  clustered broomrape · Orobanchaceae 23 counties
• 
  Orobanche ludoviciana Nutt. Native ORLU

  Louisiana broomrape · Orobanchaceae 12 counties
• 
  Orobanche ludoviciana Nutt. ssp. ludoviciana Native ORLUL2

  Louisiana broomrape · Orobanchaceae 12 counties
• 
  Orobanche uniflora L. Native ORUN

  oneflowered broomrape · Orobanchaceae 7 counties
• 
  Orogenia linearifolia S. Watson Native ORLI

  Great Basin Indian potato · Apiaceae 1 county
• 
  Orthilia secunda (L.) House Native ORSE

  sidebells wintergreen · Pyrolaceae 15 counties
• 
  Orthocarpus luteus Nutt. Native ORLU2

  yellow owl's-clover · Scrophulariaceae 24 counties
• 
  Orthocarpus tenuifolius (Pursh) Benth. Native ORTE2

  thinleaved owl's-clover · Scrophulariaceae 14 counties
• 
  Orthocarpus tolmiei Hook. & Arn. Native ORTO

  Tolmie's owl's-clover · Scrophulariaceae 1 county
• 
  Orthocarpus tolmiei Hook. & Arn. ssp. tolmiei Native ORTOT

  Tolmie's owl's-clover · Scrophulariaceae 1 county
• 
  Oryzopsis asperifolia Michx. Native ORAS

  roughleaf ricegrass · Poaceae 2 counties
• 
  Osmorhiza berteroi DC. Native OSBE

  sweetcicely · Apiaceae 9 counties
• 
  Osmorhiza depauperata Phil. Native OSDE

  bluntseed sweetroot · Apiaceae 9 counties
• 
  Osmorhiza longistylis (Torr.) DC. Native OSLO

  longstyle sweetroot · Apiaceae 8 counties
• 
  Osmorhiza occidentalis (Nutt. ex Torr. & A. Gray) Torr. Native OSOC

  western sweetroot · Apiaceae 14 counties
• 
  Osmorhiza purpurea (J.M. Coult. & Rose) Suksd. Native OSPU

  purple sweetroot · Apiaceae 1 county