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 2,501–2,550 of 3,277.

• 
  Ricinus communis L. Introduced RICO3

  castorbean · Euphorbiaceae 1 county
• 
  Robinia hispida L. Native ROHI

  bristly locust · Fabaceae 33 counties
• 
  Robinia hispida L. var. hispida Native ROHIH

  bristly locust · Fabaceae 33 counties
• 
  Robinia pseudoacacia L. Native ROPS

  black locust · Fabaceae 56 counties
• 
  Rorippa islandica (Oeder) Borbás Introduced ROIS2

  northern marsh yellowcress · Brassicaceae 1 county
• 
  Rorippa palustris (L.) Besser Native ROPA2

  bog yellowcress · Brassicaceae 37 counties
• 
  Rorippa palustris (L.) Besser ssp. fernaldiana (Butters & Abbe) Jonsell Native ROPAF2

  Fernald's yellowcress · Brassicaceae 37 counties
• 
  Rorippa sessiliflora (Nutt.) Hitchc. Native ROSE

  stalkless yellowcress · Brassicaceae 25 counties
• 
  Rorippa sinuata (Nutt.) Hitchc. Native ROSI2

  spreading yellowcress · Brassicaceae 4 counties
• 
  Rorippa sylvestris (L.) Besser Introduced ROSY

  creeping yellowcress · Brassicaceae 1 county
• 
  Rosa arkansana Porter Native ROAR3

  prairie rose · Rosaceae 1 county
• 
  Rosa arkansana Porter var. suffulta (Greene) Cockerell Native ROARS

  prairie rose · Rosaceae 1 county
• 
  Rosa bracteata J.C. Wendl. Introduced ROBR

  Macartney rose · Rosaceae 8 counties
• 
  Rosa carolina L. Native ROCA4

  Carolina rose · Rosaceae 56 counties
• 
  Rosa carolina L. var. carolina Native ROCAC

  Carolina rose · Rosaceae 56 counties
• 
  Rosa chinensis Jacq. Introduced ROCH

  Chinese rose · Rosaceae 6 counties
• 
  Rosa foliolosa Nutt. ex Torr. & A. Gray Native ROFO

  white prairie rose · Rosaceae 3 counties
• 
  Rosa multiflora Thunb. Introduced ROMU

  multiflora rose · Rosaceae 33 counties
• 
  Rosa palustris Marshall Native ROPA

  swamp rose · Rosaceae 13 counties
• 
  Rosa rubiginosa L. Introduced RORU82

  sweetbriar rose · Rosaceae 7 counties
• 
  Rosa setigera Michx. Native ROSE2

  climbing rose · Rosaceae 45 counties
• 
  Rosa wichuraiana Crép. Introduced ROWI

  memorial rose · Rosaceae 8 counties
• ⚘
  Rosa ×borboniana N.H.F. Desp. (pro sp.) [chinensis × damascena] Introduced ROBO3

  Bourbon rose · Rosaceae 1 county
• 
  Rotala ramosior (L.) Koehne Native RORA

  lowland rotala · Lythraceae 44 counties
• 
  Rottboellia cochinchinensis (Lour.) W.D. Clayton Introduced ROCO6

  itchgrass · Poaceae 1 county
• 
  Rubus aboriginum Rydb. Native RUAB

  garden dewberry · Rosaceae 1 county
• 
  Rubus allegheniensis Porter Native RUAL

  Allegheny blackberry · Rosaceae 7 counties
• 
  Rubus allegheniensis Porter var. allegheniensis Native RUALA

  Allegheny blackberry · Rosaceae 7 counties
• 
  Rubus argutus Link Native RUAR2

  sawtooth blackberry · Rosaceae 31 counties
• 
  Rubus armeniacus Focke Introduced RUAR9

  Himalayan blackberry · Rosaceae 9 counties
• 
  Rubus bifrons Vest ex Tratt. Introduced RUBI

  Himalayan berry · Rosaceae 7 counties
• ⚘
  Rubus bushii L.H. Bailey Native RUBU2

  Bush's blackberry · Rosaceae 23 counties
• 
  Rubus flagellaris Willd. Native RUFL

  northern dewberry · Rosaceae 52 counties
• 
  Rubus idaeus L. Both RUID

  American red raspberry · Rosaceae 2 counties
• 
  Rubus idaeus L. ssp. idaeus Introduced RUIDI

  American red raspberry · Rosaceae 2 counties
• 
  Rubus occidentalis L. Native RUOC

  black raspberry · Rosaceae 11 counties
• 
  Rubus phoenicolasius Maxim. Introduced RUPH

  wine raspberry · Rosaceae 5 counties
• 
  Rubus trivialis Michx. Native RUTR

  southern dewberry · Rosaceae 40 counties
• 
  Rudbeckia fulgida Aiton Native RUFU2

  orange coneflower · Asteraceae 9 counties
• 
  Rudbeckia fulgida Aiton var. speciosa (Wender.) Perdue Native RUFUS3

  orange coneflower · Asteraceae 3 counties
• 
  Rudbeckia fulgida Aiton var. umbrosa (C.L. Boynt. & Beadle) Cronquist Native RUFUU

  orange coneflower · Asteraceae 6 counties
• 
  Rudbeckia grandiflora (D. Don) J.F. Gmel. ex DC. Native RUGR

  rough coneflower · Asteraceae 35 counties
• 
  Rudbeckia grandiflora (D. Don) J.F. Gmel. ex DC. var. alismifolia (Torr. & A. Gray) Cronquist Native RUGRA

  rough coneflower · Asteraceae 21 counties
• 
  Rudbeckia grandiflora (D. Don) J.F. Gmel. ex DC. var. grandiflora Native RUGRG

  rough coneflower · Asteraceae 15 counties
• 
  Rudbeckia heliopsidis Torr. & A. Gray Native RUHE

  sunfacing coneflower · Asteraceae 1 county
• 
  Rudbeckia hirta L. Native RUHI2

  blackeyed Susan · Asteraceae 75 counties
• 
  Rudbeckia laciniata L. Native RULA3

  cutleaf coneflower · Asteraceae 17 counties
• 
  Rudbeckia laciniata L. var. laciniata Native RULAL

  cutleaf coneflower · Asteraceae 17 counties
• 
  Rudbeckia maxima Nutt. Native RUMA3

  great coneflower · Asteraceae 3 counties
• 
  Rudbeckia missouriensis Engelm. ex C.L. Boynt. & Beadle Native RUMI

  Missouri orange coneflower · Asteraceae 14 counties