Louisiana

• Acadia 22001
  964 taxa Open ↗
• Allen 22003
  1,426 taxa Open ↗
• Ascension 22005
  551 taxa Open ↗
• Assumption 22007
  456 taxa Open ↗
• Avoyelles 22009
  803 taxa Open ↗
• Beauregard 22011
  1,018 taxa Open ↗
• Bienville 22013
  1,400 taxa Open ↗
• Bossier 22015
  1,395 taxa Open ↗
• Caddo 22017
  1,796 taxa Open ↗
• Calcasieu 22019
  1,531 taxa Open ↗

Showing 201–250 of 3,739.

• 
  Arabidopsis thaliana (L.) Heynh. Introduced ARTH

  mouseear cress · Brassicaceae 6 counties
• 
  Arabis canadensis L. Native ARCA

  sicklepod · Brassicaceae 3 counties
• 
  Arachis hypogaea L. Introduced ARHY

  peanut · Fabaceae 9 counties
• 
  Aralia spinosa L. Native ARSP2

  devil's walkingstick · Araliaceae 45 counties
• 
  Arctium minus Bernh. Introduced ARMI2

  lesser burdock · Asteraceae 2 counties
• 
  Ardisia crenata Sims Introduced ARCR80

  hen's eyes · Myrsinaceae 6 counties
• 
  Arenaria benthamii Fenzl ex Torr. & A. Gray Native ARBE

  hilly sandwort · Caryophyllaceae 1 county
• 
  Arenaria lanuginosa (Michx.) Rohrb. Native ARLA4

  spreading sandwort · Caryophyllaceae 9 counties
• 
  Arenaria lanuginosa (Michx.) Rohrb. ssp. lanuginosa Native ARLAL2

  spreading sandwort · Caryophyllaceae 9 counties
• 
  Arenaria lanuginosa (Michx.) Rohrb. ssp. lanuginosa var. lanuginosa Native ARLAL3

  spreading sandwort · Caryophyllaceae 9 counties
• 
  Arenaria serpyllifolia L. Introduced ARSE2

  thymeleaf sandwort · Caryophyllaceae 18 counties
• 
  Argemone albiflora Hornem. Native ARAL3

  bluestem pricklypoppy · Papaveraceae 12 counties
• 
  Argemone mexicana L. Native ARME4

  Mexican pricklypoppy · Papaveraceae 6 counties
• 
  Arisaema dracontium (L.) Schott Native ARDR3

  green dragon · Araceae 53 counties
• 
  Arisaema triphyllum (L.) Schott Native ARTR

  Jack in the pulpit · Araceae 43 counties
• 
  Arisaema triphyllum (L.) Schott ssp. pusillum (Peck) Huttleston Native ARTRP

  Jack in the pulpit · Araceae 18 counties
• 
  Arisaema triphyllum (L.) Schott ssp. quinatum (Buckley) Huttleston Native ARTRQ

  Jack in the pulpit · Araceae 25 counties
• 
  Arisaema triphyllum (L.) Schott ssp. triphyllum Native ARTRT3

  Jack in the pulpit · Araceae 42 counties
• 
  Aristida desmantha Trin. & Rupr. Native ARDE3

  curly threeawn · Poaceae 6 counties
• 
  Aristida dichotoma Michx. Native ARDI4

  churchmouse threeawn · Poaceae 20 counties
• 
  Aristida dichotoma Michx. var. dichotoma Native ARDID

  churchmouse threeawn · Poaceae 20 counties
• 
  Aristida lanosa Muhl. ex Elliott Native ARLA6

  woollysheath threeawn · Poaceae 19 counties
• 
  Aristida longespica Poir. Native ARLO16

  slimspike threeawn · Poaceae 44 counties
• 
  Aristida longespica Poir. var. geniculata (Raf.) Fernald Native ARLOG6

  slimspike threeawn · Poaceae 31 counties
• 
  Aristida longespica Poir. var. longespica Native ARLOL3

  slimspike threeawn · Poaceae 41 counties
• 
  Aristida oligantha Michx. Native AROL

  prairie threeawn · Poaceae 43 counties
• 
  Aristida palustris (Chapm.) Vasey Native ARPA26

  longleaf threeawn · Poaceae 7 counties
• 
  Aristida purpurascens Poir. Native ARPU8

  arrowfeather threeawn · Poaceae 40 counties
• 
  Aristida purpurascens Poir. var. purpurascens Native ARPUP4

  arrowfeather threeawn · Poaceae 40 counties
• 
  Aristida purpurascens Poir. var. virgata (Trin.) Allred Native ARPUV

  arrowfeather threeawn · Poaceae 24 counties
• 
  Aristida purpurea Nutt. Native ARPU9

  purple threeawn · Poaceae 2 counties
• 
  Aristida purpurea Nutt. var. longiseta (Steud.) Vasey Native ARPUL

  Fendler threeawn · Poaceae 1 county
• 
  Aristida purpurea Nutt. var. purpurea Native ARPUP6

  purple threeawn · Poaceae 2 counties
• 
  Aristolochia reticulata Jacq. Native ARRE3

  Texas dutchman's pipe · Aristolochiaceae 20 counties
• 
  Aristolochia serpentaria L. Native ARSE3

  Virginia snakeroot · Aristolochiaceae 38 counties
• 
  Aristolochia tomentosa Sims Native ARTO3

  woolly dutchman's pipe · Aristolochiaceae 9 counties
• 
  Armoracia rusticana G. Gaertn., B. Mey. & Scherb. Introduced ARRU4

  horseradish · Brassicaceae 1 county
• 
  Arnoglossum atriplicifolium (L.) H. Rob. Native ARAT

  pale Indian plantain · Asteraceae 1 county
• 
  Arnoglossum ovatum (Walter) H. Rob. Native AROV

  ovateleaf cacalia · Asteraceae 17 counties
• 
  Arnoglossum plantagineum Raf. Native ARPL4

  groovestem Indian plantain · Asteraceae 22 counties
• 
  Aronia arbutifolia (L.) Pers. Native ARAR7

  red chokeberry · Rosaceae 27 counties
• 
  Arrhenatherum elatius (L.) P. Beauv. ex J. Presl & C. Presl Introduced AREL3

  tall oatgrass · Poaceae 3 counties
• 
  Arrhenatherum elatius (L.) P. Beauv. ex J. Presl & C. Presl var. elatius Introduced ARELE

  tall oatgrass · Poaceae 3 counties
• 
  Artemisia annua L. Introduced ARAN3

  sweet sagewort · Asteraceae 9 counties
• 
  Artemisia ludoviciana Nutt. Both ARLU

  white sagebrush · Asteraceae 14 counties
• 
  Artemisia ludoviciana Nutt. ssp. ludoviciana Native ARLUL2

  white sagebrush · Asteraceae 14 counties
• 
  Artemisia stelleriana Besser Introduced ARST6

  oldwoman · Asteraceae 2 counties
• 
  Arthraxon hispidus (Thunb.) Makino Introduced ARHI3

  small carpetgrass · Poaceae 17 counties
• 
  Arundinaria gigantea (Walter) Muhl. Native ARGI

  giant cane · Poaceae 58 counties
• 
  Arundinaria tecta (Walter) Muhl. Both ARTE4

  switchcane · Poaceae 5 counties