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 2,301–2,350 of 3,215.

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  Polygonum bistortoides Pursh Native POBI6

  American bistort · Polygonaceae 28 counties
• 
  Polygonum buxiforme Small Native POBU2

  box knotweed · Polygonaceae 1 county
• 
  Polygonum convolvulus L. Introduced POCO10

  black bindweed · Polygonaceae 37 counties
• 
  Polygonum convolvulus L. var. convolvulus Introduced POCOC2

  black bindweed · Polygonaceae 37 counties
• 
  Polygonum cuspidatum Siebold & Zucc. Introduced POCU6

  Japanese knotweed · Polygonaceae 11 counties
• 
  Polygonum douglasii Greene Native PODO4

  Douglas' knotweed · Polygonaceae 34 counties
• 
  Polygonum douglasii Greene ssp. austiniae (Greene) A.E. Murray Native PODOA2

  Austin knotweed · Polygonaceae 1 county
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  Polygonum douglasii Greene ssp. douglasii Native PODOD4

  Douglas' knotweed · Polygonaceae 2 counties
• 
  Polygonum douglasii Greene ssp. engelmannii (Greene) Kartesz & Gandhi Native PODOE

  Engelmann's knotweed · Polygonaceae 2 counties
• 
  Polygonum douglasii Greene ssp. johnstonii (Munz) J.C. Hickman Native PODOJ2

  Johnston's knotweed · Polygonaceae 4 counties
• 
  Polygonum erectum L. Native POER2

  erect knotweed · Polygonaceae 8 counties
• 
  Polygonum hydropiper L. Introduced POHY

  marshpepper knotweed · Polygonaceae 8 counties
• 
  Polygonum lapathifolium L. Native POLA4

  curlytop knotweed · Polygonaceae 34 counties
• ⚘
  Polygonum leptocarpum B.L. Rob. Native POLE6

  narrowpoint knotweed · Polygonaceae 2 counties
• 
  Polygonum minimum S. Watson Native POMI2

  broadleaf knotweed · Polygonaceae 4 counties
• 
  Polygonum pensylvanicum L. Native POPE2

  Pennsylvania smartweed · Polygonaceae 2 counties
• 
  Polygonum persicaria L. Introduced POPE3

  spotted ladysthumb · Polygonaceae 26 counties
• 
  Polygonum phytolaccifolium Meisn. ex Small Native POPH

  poke knotweed · Polygonaceae 1 county
• 
  Polygonum polygaloides Wall. ex Meisn. Native POPO4

  milkwort knotweed · Polygonaceae 8 counties
• 
  Polygonum polygaloides Wall. ex Meisn. ssp. confertiflorum (Nutt. ex Piper) J.C. Hickman Native POPOC

  fruitleaf knotweed · Polygonaceae 6 counties
• 
  Polygonum polygaloides Wall. ex Meisn. ssp. kelloggii (Greene) J.C. Hickman Native POPOK

  Kellogg's knotweed · Polygonaceae 4 counties
• 
  Polygonum punctatum Elliott Native POPU5

  dotted smartweed · Polygonaceae 2 counties
• 
  Polygonum punctatum Elliott var. confertiflorum (Meisn.) Fassett Native POPUC2

  dotted smartweed · Polygonaceae 2 counties
• 
  Polygonum ramosissimum Michx. Native PORA3

  bushy knotweed · Polygonaceae 17 counties
• 
  Polygonum ramosissimum Michx. var. ramosissimum Native PORAR

  bushy knotweed · Polygonaceae 15 counties
• 
  Polygonum sachalinense F. Schmidt ex Maxim. Introduced POSA4

  giant knotweed · Polygonaceae 21 counties
• 
  Polygonum scandens L. Both POSC3

  climbing false buckwheat · Polygonaceae 1 county
• 
  Polygonum scandens L. var. scandens Native POSCS

  climbing false buckwheat · Polygonaceae 1 county
• 
  Polygonum viviparum L. Native POVI3

  alpine bistort · Polygonaceae 8 counties
• 
  Polypogon monspeliensis (L.) Desf. Introduced POMO5

  annual rabbitsfoot grass · Poaceae 20 counties
• 
  Polystichum lonchitis (L.) Roth Native POLO4

  northern hollyfern · Dryopteridaceae 2 counties
• 
  Polystichum scopulinum (D.C. Eaton) Maxon Native POSC5

  mountain hollyfern · Dryopteridaceae 1 county
• 
  Populus alba L. Introduced POAL7

  white poplar · Salicaceae 12 counties
• 
  Populus angustifolia James Native POAN3

  narrowleaf cottonwood · Salicaceae 20 counties
• 
  Populus balsamifera L. Native POBA2

  balsam poplar · Salicaceae 32 counties
• 
  Populus balsamifera L. ssp. balsamifera Native POBAB2

  balsam poplar · Salicaceae 1 county
• 
  Populus balsamifera L. ssp. trichocarpa (Torr. & A. Gray ex Hook.) Brayshaw Native POBAT

  black cottonwood · Salicaceae 31 counties
• 
  Populus deltoides W. Bartram ex Marshall Native PODE3

  eastern cottonwood · Salicaceae 39 counties
• 
  Populus deltoides W. Bartram ex Marshall ssp. monilifera (Aiton) Eckenwalder Native PODEM

  plains cottonwood · Salicaceae 39 counties
• 
  Populus tremuloides Michx. Native POTR5

  quaking aspen · Salicaceae 34 counties
• ⚘
  Populus ×acuminata Rydb. (pro sp.) [angustifolia × deltoides] Native POAC5

  lanceleaf cottonwood · Salicaceae 9 counties
• ⚘
  Populus ×brayshawii B. Boivin [angustifolia × balsamifera] Native POBR7

  hybrid balsam poplar · Salicaceae 1 county
• 
  Porterella carnosula (Hook. & Arn.) Torr. Native POCA15

  fleshy porterella · Campanulaceae 1 county
• 
  Portulaca oleracea L. Both POOL

  little hogweed · Portulacaceae 32 counties
• 
  Potamogeton alpinus Balbis Native POAL8

  alpine pondweed · Potamogetonaceae 3 counties
• 
  Potamogeton amplifolius Tuck. Native POAM5

  largeleaf pondweed · Potamogetonaceae 1 county
• 
  Potamogeton crispus L. Introduced POCR3

  curly pondweed · Potamogetonaceae 2 counties
• 
  Potamogeton diversifolius Raf. Native PODI

  waterthread pondweed · Potamogetonaceae 3 counties
• 
  Potamogeton epihydrus Raf. Native POEP2

  ribbonleaf pondweed · Potamogetonaceae 2 counties
• 
  Potamogeton foliosus Raf. Native POFO3

  leafy pondweed · Potamogetonaceae 9 counties