Arkansas

• Arkansas 05001
  816 taxa Open ↗
• Ashley 05003
  1,236 taxa Open ↗
• Baxter 05005
  1,025 taxa Open ↗
• Benton 05007
  1,372 taxa Open ↗
• Boone 05009
  697 taxa Open ↗
• Bradley 05011
  1,145 taxa Open ↗
• Calhoun 05013
  573 taxa Open ↗
• Carroll 05015
  1,039 taxa Open ↗
• Chicot 05017
  440 taxa Open ↗
• Clark 05019
  896 taxa Open ↗

Showing 1,551–1,600 of 2,679 (native).

• 
  Myriophyllum pinnatum (Walter) Britton, Sterns & Poggenb. Native MYPI

  cutleaf watermilfoil · Haloragaceae 17 counties
• 
  Najas flexilis (Willd.) Rostk. & Schmidt Native NAFL

  nodding waternymph · Najadaceae 1 county
• 
  Najas guadalupensis (Spreng.) Magnus Native NAGU

  southern waternymph · Najadaceae 6 counties
• 
  Najas guadalupensis (Spreng.) Magnus ssp. guadalupensis Native NAGUG

  southern waternymph · Najadaceae 6 counties
• 
  Nassella leucotricha (Trin. & Rupr.) Pohl Native NALE3

  Texas wintergrass · Poaceae 1 county
• 
  Nekemias arborea (L.) J. Wen & Boggan Native NEAR5

  peppervine · Vitaceae 61 counties
• 
  Nelumbo lutea Willd. Native NELU

  American lotus · Nelumbonaceae 29 counties
• 
  Nemastylis geminiflora Nutt. Native NEGE

  prairie pleatleaf · Iridaceae 12 counties
• 
  Nemastylis nuttallii Pickering ex R.C. Foster Native NENU

  Nuttall's pleatleaf · Iridaceae 8 counties
• 
  Nemophila aphylla (L.) Brummitt Native NEAP

  smallflower baby blue eyes · Hydrophyllaceae 11 counties
• 
  Nemophila menziesii Hook. & Arn. Native NEME

  baby blue eyes · Hydrophyllaceae 1 county
• 
  Nemophila phacelioides Nutt. Native NEPH

  largeflower baby blue eyes · Hydrophyllaceae 12 counties
• 
  Neobeckia aquatica (Eaton) Greene Native NEAQ2

  lakecress · Brassicaceae 11 counties
• 
  Neptunia lutea (Leavenworth) Benth. Native NELU2

  yellow puff · Fabaceae 14 counties
• 
  Neviusia alabamensis A. Gray Native NEAL

  Alabama snow-wreath · Rosaceae 4 counties
• 
  Nothocalais cuspidata (Pursh) Greene Native NOCU

  prairie false dandelion · Asteraceae 1 county
• 
  Nothoscordum bivalve (L.) Britton Native NOBI2

  crowpoison · Liliaceae 53 counties
• 
  Nuphar lutea (L.) Sm. Native NULU

  yellow pond-lily · Nymphaeaceae 26 counties
• 
  Nuphar lutea (L.) Sm. ssp. advena (Aiton) Kartesz & Gandhi Native NULUA

  yellow pond-lily · Nymphaeaceae 26 counties
• 
  Nuttallanthus canadensis (L.) D.A. Sutton Native NUCA

  Canada toadflax · Scrophulariaceae 67 counties
• 
  Nuttallanthus texanus (Scheele) D.A. Sutton Native NUTE

  Texas toadflax · Scrophulariaceae 4 counties
• ⚘
  Nymphaea odorata Aiton Native NYOD

  American white waterlily · Nymphaeaceae 20 counties
• ⚘
  Nymphaea odorata Aiton ssp. odorata Native NYODO

  American white waterlily · Nymphaeaceae 1 county
• 
  Nyssa aquatica L. Native NYAQ2

  water tupelo · Cornaceae 43 counties
• 
  Nyssa biflora Walter Native NYBI

  swamp tupelo · Cornaceae 4 counties
• 
  Nyssa sylvatica Marshall Native NYSY

  blackgum · Cornaceae 74 counties
• 
  Obolaria virginica L. Native OBVI

  Virginia pennywort · Gentianaceae 3 counties
• 
  Oenothera biennis L. Native OEBI

  common evening primrose · Onagraceae 3 counties
• 
  Oenothera curtiflora W.L. Wagner & Hoch Native OECU2

  velvetweed · Onagraceae 13 counties
• 
  Oenothera demareei (P.H. Raven & D.P. Greg.) W.L. Wagner & Hoch Native OEDE

  Demaree's beeblossom · Onagraceae 13 counties
• 
  Oenothera filiformis (Small) W.L. Wagner & Hoch Native OEFI2

  longflower beeblossom · Onagraceae 44 counties
• 
  Oenothera fruticosa L. Native OEFR

  narrowleaf evening primrose · Onagraceae 31 counties
• 
  Oenothera fruticosa L. ssp. fruticosa Native OEFRF

  narrowleaf evening primrose · Onagraceae 31 counties
• 
  Oenothera grandis (Britton) Smyth Native OEGR2

  showy evening primrose · Onagraceae 5 counties
• 
  Oenothera heterophylla Spach Native OEHE3

  variableleaf evening primrose · Onagraceae 4 counties
• 
  Oenothera heterophylla Spach ssp. heterophylla Native OEHEH

  variableleaf evening primrose · Onagraceae 1 county
• 
  Oenothera heterophylla Spach ssp. orientalis W. Dietr., P.H. Raven & W.L. Wagner Native OEHEO

  Oriental evening primrose · Onagraceae 3 counties
• 
  Oenothera laciniata Hill Native OELA

  cutleaf evening primrose · Onagraceae 70 counties
• 
  Oenothera linifolia Nutt. Native OELI

  threadleaf evening primrose · Onagraceae 53 counties
• 
  Oenothera macrocarpa Nutt. Native OEMA

  bigfruit evening primrose · Onagraceae 6 counties
• 
  Oenothera macrocarpa Nutt. ssp. macrocarpa Native OEMAM

  bigfruit evening primrose · Onagraceae 6 counties
• 
  Oenothera pilosella Raf. Native OEPI2

  meadow evening primrose · Onagraceae 29 counties
• 
  Oenothera pilosella Raf. ssp. pilosella Native OEPIP

  meadow evening primrose · Onagraceae 25 counties
• 
  Oenothera pilosella Raf. ssp. sessilis (Pennell) Straley Native OEPIS

  meadow evening primrose · Onagraceae 10 counties
• 
  Oenothera rhombipetala Nutt. ex Torr. & A. Gray Native OERH

  fourpoint evening primrose · Onagraceae 7 counties
• 
  Oenothera sinuosa W.L. Wagner & Hoch Native OESI3

  wavyleaf beeblossom · Onagraceae 3 counties
• 
  Oenothera spachiana Torr. & A. Gray Native OESP

  Spach's evening primrose · Onagraceae 3 counties
• 
  Oenothera speciosa Nutt. Native OESP2

  pinkladies · Onagraceae 54 counties
• 
  Oenothera triloba Nutt. Native OETR2

  stemless evening primrose · Onagraceae 4 counties
• 
  Oenothera villosa Thunb. Native OEVI

  hairy evening primrose · Onagraceae 59 counties