Illinois

• Adams 17001
  1,183 taxa Open ↗
• Alexander 17003
  1,220 taxa Open ↗
• Bond 17005
  682 taxa Open ↗
• Boone 17007
  1,163 taxa Open ↗
• Brown 17009
  836 taxa Open ↗
• Bureau 17011
  652 taxa Open ↗
• Calhoun 17013
  1,017 taxa Open ↗
• Carroll 17015
  931 taxa Open ↗
• Cass 17017
  1,389 taxa Open ↗
• Champaign 17019
  1,420 taxa Open ↗

Showing 2,801–2,850 of 3,775.

• 
  Pteridium aquilinum (L.) Kuhn Native PTAQ

  western brackenfern · Dennstaedtiaceae 64 counties
• 
  Pteridium aquilinum (L.) Kuhn var. latiusculum (Desv.) Underw. ex A. Heller Native PTAQL

  western brackenfern · Dennstaedtiaceae 62 counties
• 
  Pteridium aquilinum (L.) Kuhn var. pseudocaudatum (Clute) A. Heller Native PTAQP

  western brackenfern · Dennstaedtiaceae 4 counties
• 
  Ptilimnium costatum (Elliott) Raf. Native PTCO

  ribbed mock bishopweed · Apiaceae 6 counties
• 
  Ptilimnium nuttallii (DC.) Britton Native PTNU

  laceflower · Apiaceae 6 counties
• 
  Puccinellia distans (Jacq.) Parl. Both PUDI

  weeping alkaligrass · Poaceae 12 counties
• 
  Puccinellia distans (Jacq.) Parl. ssp. distans Introduced PUDID

  weeping alkaligrass · Poaceae 12 counties
• 
  Pueraria montana (Lour.) Merr. Introduced PUMO

  kudzu · Fabaceae 8 counties
• 
  Pueraria montana (Lour.) Merr. var. lobata (Willd.) Maesen & S.M. Almeida ex Sanjappa & Predeep Introduced PUMOL

  kudzu · Fabaceae 8 counties
• 
  Pulsatilla patens (L.) Mill. Native PUPA5

  eastern pasqueflower · Ranunculaceae 8 counties
• 
  Pulsatilla patens (L.) Mill. ssp. multifida (Pritz.) Zamels Native PUPAM

  cutleaf anemone · Ranunculaceae 8 counties
• 
  Pycnanthemum albescens Torr. & A. Gray Native PYAL

  whiteleaf mountainmint · Lamiaceae 2 counties
• 
  Pycnanthemum incanum (L.) Michx. Native PYIN

  hoary mountainmint · Lamiaceae 9 counties
• 
  Pycnanthemum incanum (L.) Michx. var. incanum Native PYINI

  hoary mountainmint · Lamiaceae 9 counties
• 
  Pycnanthemum muticum (Michx.) Pers. Native PYMU

  clustered mountainmint · Lamiaceae 2 counties
• 
  Pycnanthemum pycnanthemoides (Leavenworth) Fernald Native PYPY

  southern mountainmint · Lamiaceae 13 counties
• 
  Pycnanthemum pycnanthemoides (Leavenworth) Fernald var. pycnanthemoides Native PYPYP

  southern mountainmint · Lamiaceae 13 counties
• 
  Pycnanthemum tenuifolium Schrad. Native PYTE

  narrowleaf mountainmint · Lamiaceae 94 counties
• ⚘
  Pycnanthemum torrei Benth. Native PYTO

  Torrey's mountainmint · Lamiaceae 4 counties
• 
  Pycnanthemum verticillatum (Michx.) Pers. Native PYVE

  whorled mountainmint · Lamiaceae 71 counties
• 
  Pycnanthemum verticillatum (Michx.) Pers. var. pilosum (Nutt.) Cooperr. Native PYVEP

  whorled mountainmint · Lamiaceae 71 counties
• 
  Pycnanthemum virginianum (L.) T. Dur. & B.D. Jacks. ex B.L. Rob. & Fernald Native PYVI

  Virginia mountainmint · Lamiaceae 74 counties
• 
  Pyrola americana Sweet Native PYAM

  American wintergreen · Pyrolaceae 2 counties
• 
  Pyrola chlorantha Sw. Native PYCH

  greenflowered wintergreen · Pyrolaceae 1 county
• 
  Pyrola elliptica Nutt. Native PYEL

  waxflower shinleaf · Pyrolaceae 14 counties
• 
  Pyrrhopappus carolinianus (Walter) DC. Native PYCA2

  Carolina desert-chicory · Asteraceae 43 counties
• 
  Pyrus calleryana Decne. Introduced PYCA80

  Callery pear · Rosaceae 1 county
• 
  Pyrus communis L. Introduced PYCO

  common pear · Rosaceae 30 counties
• 
  Pyrus pyrifolia (Burm. f.) Nakai Introduced PYPY2

  Chinese pear · Rosaceae 1 county
• ⚘
  Quercus alba L. Native QUAL

  white oak · Fagaceae 102 counties
• ⚘
  Quercus bicolor Willd. Native QUBI

  swamp white oak · Fagaceae 65 counties
• 
  Quercus coccinea Münchh. Native QUCO2

  scarlet oak · Fagaceae 16 counties
• 
  Quercus coccinea Münchh. var. coccinea Native QUCOC

  scarlet oak · Fagaceae 2 counties
• 
  Quercus ellipsoidalis E.J. Hill Native QUEL

  northern pin oak · Fagaceae 18 counties
• 
  Quercus falcata Michx. Native QUFA

  southern red oak · Fagaceae 22 counties
• 
  Quercus imbricaria Michx. Native QUIM

  shingle oak · Fagaceae 91 counties
• 
  Quercus lyrata Walter Native QULY

  overcup oak · Fagaceae 29 counties
• 
  Quercus macrocarpa Michx. Native QUMA2

  bur oak · Fagaceae 102 counties
• 
  Quercus macrocarpa Michx. var. macrocarpa Native QUMAM

  bur oak · Fagaceae 102 counties
• 
  Quercus marilandica Münchh. Native QUMA3

  blackjack oak · Fagaceae 57 counties
• 
  Quercus marilandica Münchh. var. marilandica Native QUMAM2

  blackjack oak · Fagaceae 56 counties
• 
  Quercus michauxii Nutt. Native QUMI

  swamp chestnut oak · Fagaceae 20 counties
• 
  Quercus montana Willd. Native QUMO4

  chestnut oak · Fagaceae 6 counties
• 
  Quercus muehlenbergii Engelm. Native QUMU

  chinquapin oak · Fagaceae 100 counties
• 
  Quercus pagoda Raf. Native QUPA5

  cherrybark oak · Fagaceae 10 counties
• 
  Quercus palustris Münchh. Native QUPA2

  pin oak · Fagaceae 79 counties
• 
  Quercus phellos L. Native QUPH

  willow oak · Fagaceae 7 counties
• 
  Quercus rubra L. Native QURU

  northern red oak · Fagaceae 96 counties
• 
  Quercus rubra L. var. rubra Native QURUR

  northern red oak · Fagaceae 6 counties
• 
  Quercus shumardii Buckley Native QUSH

  Shumard's oak · Fagaceae 25 counties