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 1–50 of 465 (introduced).

• 
  Abutilon theophrasti Medik. Introduced ABTH

  velvetleaf · Malvaceae 24 counties
• 
  Acer platanoides L. Introduced ACPL

  Norway maple · Aceraceae 7 counties
• 
  Achillea nobilis L. Introduced ACNO

  noble yarrow · Asteraceae 3 counties
• 
  Achillea ptarmica L. Introduced ACPT

  sneezeweed · Asteraceae 4 counties
• 
  Acinos arvensis (Lam.) Dandy Introduced ACAR2

  basil thyme · Lamiaceae 1 county
• 
  Acroptilon repens (L.) DC. Introduced ACRE3

  hardheads · Asteraceae 56 counties
• 
  Adonis aestivalis L. Introduced ADAE

  summer pheasant's eye · Ranunculaceae 1 county
• 
  Adonis annua L. Introduced ADAN

  blooddrops · Ranunculaceae 2 counties
• 
  Aegilops cylindrica Host Introduced AECY

  jointed goatgrass · Poaceae 12 counties
• 
  Aegopodium podagraria L. Introduced AEPO

  bishop's goutweed · Apiaceae 1 county
• 
  Agropyron cristatum (L.) Gaertn. Introduced AGCR

  crested wheatgrass · Poaceae 44 counties
• 
  Agropyron cristatum (L.) Gaertn. ssp. pectinatum (M. Bieb.) Tzvelev Introduced AGCRP8

  crested wheatgrass · Poaceae 44 counties
• 
  Agropyron desertorum (Fisch. ex Link) Schult. Introduced AGDE2

  desert wheatgrass · Poaceae 3 counties
• 
  Agropyron fragile (Roth) P. Candargy Introduced AGFR

  Siberian wheatgrass · Poaceae 2 counties
• 
  Agrostemma githago L. Introduced AGGI

  common corncockle · Caryophyllaceae 12 counties
• 
  Agrostis stolonifera L. Introduced AGST2

  creeping bentgrass · Poaceae 46 counties
• 
  Alcea rosea L. Introduced ALRO3

  hollyhock · Malvaceae 5 counties
• 
  Allium schoenoprasum L. var. schoenoprasum Introduced ALSCS2

  wild chives · Liliaceae 2 counties
• 
  Alopecurus arundinaceus Poir. Introduced ALAR

  creeping meadow foxtail · Poaceae 7 counties
• 
  Alopecurus geniculatus L. Introduced ALGE2

  water foxtail · Poaceae 2 counties
• 
  Alopecurus pratensis L. Introduced ALPR3

  meadow foxtail · Poaceae 19 counties
• 
  Alyssum alyssoides (L.) L. Introduced ALAL3

  pale madwort · Brassicaceae 31 counties
• 
  Alyssum desertorum Stapf Introduced ALDE

  desert madwort · Brassicaceae 35 counties
• 
  Alyssum desertorum Stapf var. desertorum Introduced ALDED

  desert madwort · Brassicaceae 35 counties
• 
  Amaranthus albus L. Introduced AMAL

  prostrate pigweed · Amaranthaceae 18 counties
• 
  Amaranthus blitoides S. Watson Introduced AMBL

  mat amaranth · Amaranthaceae 41 counties
• 
  Ambrosia artemisiifolia L. var. elatior (L.) Descourtils Introduced AMARE

  annual ragweed · Asteraceae 12 counties
• 
  Anagallis arvensis L. Introduced ANAR

  scarlet pimpernel · Primulaceae 1 county
• 
  Anagallis arvensis L. ssp. arvensis Introduced ANARA7

  scarlet pimpernel · Primulaceae 1 county
• 
  Anchusa arvensis (L.) M. Bieb. Introduced ANAR16

  small bugloss · Boraginaceae 4 counties
• 
  Anchusa azurea Mill. Introduced ANAZ

  Italian bugloss · Boraginaceae 2 counties
• 
  Anchusa officinalis L. Introduced ANOF

  common bugloss · Boraginaceae 6 counties
• 
  Anethum graveolens L. Introduced ANGR2

  dill · Apiaceae 3 counties
• 
  Anthemis arvensis L. Introduced ANAR6

  corn chamomile · Asteraceae 2 counties
• 
  Anthemis cotula L. Introduced ANCO2

  stinking chamomile · Asteraceae 11 counties
• 
  Anthemis tinctoria L. Introduced ANTI

  golden chamomile · Asteraceae 5 counties
• 
  Anthriscus cerefolium (L.) Hoffm. Introduced ANCE

  garden chervil · Apiaceae 1 county
• 
  Apera interrupta (L.) P. Beauv. Introduced APIN

  dense silkybent · Poaceae 10 counties
• 
  Arabidopsis thaliana (L.) Heynh. Introduced ARTH

  mouseear cress · Brassicaceae 22 counties
• 
  Arctium lappa L. Introduced ARLA3

  greater burdock · Asteraceae 14 counties
• 
  Arctium minus Bernh. Introduced ARMI2

  lesser burdock · Asteraceae 30 counties
• 
  Arenaria serpyllifolia L. Introduced ARSE2

  thymeleaf sandwort · Caryophyllaceae 11 counties
• 
  Armoracia rusticana G. Gaertn., B. Mey. & Scherb. Introduced ARRU4

  horseradish · Brassicaceae 8 counties
• 
  Arrhenatherum elatius (L.) P. Beauv. ex J. Presl & C. Presl Introduced AREL3

  tall oatgrass · Poaceae 9 counties
• 
  Arrhenatherum elatius (L.) P. Beauv. ex J. Presl & C. Presl var. elatius Introduced ARELE

  tall oatgrass · Poaceae 9 counties
• 
  Artemisia abrotanum L. Introduced ARAB2

  southernwood · Asteraceae 1 county
• 
  Artemisia absinthium L. Introduced ARAB3

  absinthium · Asteraceae 29 counties
• 
  Artemisia annua L. Introduced ARAN3

  sweet sagewort · Asteraceae 3 counties
• 
  Artemisia biennis Willd. var. biennis Introduced ARBIB

  biennial wormwood · Asteraceae 14 counties
• 
  Asparagus officinalis L. Introduced ASOF

  garden asparagus · Liliaceae 12 counties