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 2,701–2,750 of 3,775.

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  Polystichum acrostichoides (Michx.) Schott var. acrostichoides Native POACA

  Christmas fern · Dryopteridaceae 82 counties
• 
  Polytaenia nuttallii DC. Native PONU4

  Nuttall's prairie parsley · Apiaceae 46 counties
• 
  Pontederia cordata L. Native POCO14

  pickerelweed · Pontederiaceae 27 counties
• 
  Populus alba L. Introduced POAL7

  white poplar · Salicaceae 57 counties
• 
  Populus balsamifera L. Native POBA2

  balsam poplar · Salicaceae 4 counties
• 
  Populus balsamifera L. ssp. balsamifera Native POBAB2

  balsam poplar · Salicaceae 4 counties
• 
  Populus deltoides W. Bartram ex Marshall Native PODE3

  eastern cottonwood · Salicaceae 95 counties
• 
  Populus deltoides W. Bartram ex Marshall ssp. deltoides Native PODED

  eastern cottonwood · Salicaceae 2 counties
• 
  Populus grandidentata Michx. Native POGR4

  bigtooth aspen · Salicaceae 47 counties
• 
  Populus heterophylla L. Native POHE4

  swamp cottonwood · Salicaceae 24 counties
• 
  Populus nigra L. Introduced PONI

  Lombardy poplar · Salicaceae 7 counties
• 
  Populus tremuloides Michx. Native POTR5

  quaking aspen · Salicaceae 39 counties
• ⚘
  Populus ×canescens (Aiton) Sm. (pro sp.) [alba × tremula] Introduced POCA14

  gray poplar · Salicaceae 4 counties
• ⚘
  Populus ×jackii Sarg. [balsamifera × deltoides] Native POJA2

  balm-of-Gilead · Salicaceae 1 county
• ⚘
  Populus ×smithii B. Boivin [grandidentata × tremuloides] Native POSM2

  cottonwood · Salicaceae 2 counties
• 
  Portulaca grandiflora Hook. Introduced POGR7

  rose moss · Portulacaceae 3 counties
• 
  Portulaca oleracea L. Both POOL

  little hogweed · Portulacaceae 102 counties
• 
  Potamogeton amplifolius Tuck. Native POAM5

  largeleaf pondweed · Potamogetonaceae 3 counties
• 
  Potamogeton crispus L. Introduced POCR3

  curly pondweed · Potamogetonaceae 42 counties
• 
  Potamogeton diversifolius Raf. Native PODI

  waterthread pondweed · Potamogetonaceae 54 counties
• 
  Potamogeton epihydrus Raf. Native POEP2

  ribbonleaf pondweed · Potamogetonaceae 3 counties
• 
  Potamogeton foliosus Raf. Native POFO3

  leafy pondweed · Potamogetonaceae 89 counties
• 
  Potamogeton foliosus Raf. ssp. foliosus Native POFOF4

  leafy pondweed · Potamogetonaceae 89 counties
• 
  Potamogeton friesii Rupr. Native POFR3

  Fries' pondweed · Potamogetonaceae 4 counties
• 
  Potamogeton gramineus L. Native POGR8

  variableleaf pondweed · Potamogetonaceae 4 counties
• 
  Potamogeton illinoensis Morong Native POIL

  Illinois pondweed · Potamogetonaceae 27 counties
• 
  Potamogeton natans L. Native PONA4

  floating pondweed · Potamogetonaceae 13 counties
• 
  Potamogeton nodosus Poir. Native PONO2

  longleaf pondweed · Potamogetonaceae 73 counties
• 
  Potamogeton praelongus Wulfen Native POPR5

  whitestem pondweed · Potamogetonaceae 3 counties
• 
  Potamogeton pulcher Tuck. Native POPU6

  spotted pondweed · Potamogetonaceae 5 counties
• 
  Potamogeton pusillus L. Native POPU7

  small pondweed · Potamogetonaceae 68 counties
• 
  Potamogeton pusillus L. ssp. pusillus Native POPUP5

  small pondweed · Potamogetonaceae 2 counties
• 
  Potamogeton richardsonii (Benn.) Rydb. Native PORI2

  Richardson's pondweed · Potamogetonaceae 4 counties
• 
  Potamogeton robbinsii Oakes Native PORO2

  Robbins' pondweed · Potamogetonaceae 2 counties
• 
  Potamogeton spirillus Tuck. Native POSP3

  spiral pondweed · Potamogetonaceae 1 county
• 
  Potamogeton strictifolius Benn. Native POST2

  narrowleaf pondweed · Potamogetonaceae 2 counties
• 
  Potamogeton vaseyi J.W. Robbins Native POVA3

  Vasey's pondweed · Potamogetonaceae 3 counties
• 
  Potamogeton zosteriformis Fernald Native POZO

  flatstem pondweed · Potamogetonaceae 7 counties
• ⚘
  Potamogeton ×hagstroemii Benn. (pro sp.) [gramineus × richardsonii] Native POHA2

  pondweed · Potamogetonaceae 1 county
• ⚘
  Potamogeton ×rectifolius Benn. [nodosus × richardsonii] Native PORE7

  pondweed · Potamogetonaceae 1 county
• ⚘
  Potamogeton ×spathuliformis (J.W. Robbins) Morong (pro sp.) [gramineus × illinoensis] Native POSP4

  spoon pondweed · Potamogetonaceae 1 county
• 
  Potentilla argentea L. Introduced POAR8

  silver cinquefoil · Rosaceae 25 counties
• 
  Potentilla argentea L. var. argentea Introduced POARA3

  silver cinquefoil · Rosaceae 25 counties
• 
  Potentilla arguta Pursh Native POAR7

  tall cinquefoil · Rosaceae 39 counties
• 
  Potentilla arguta Pursh ssp. arguta Native POARA4

  tall cinquefoil · Rosaceae 39 counties
• 
  Potentilla inclinata Vill. Introduced POIN10

  ashy cinquefoil · Rosaceae 1 county
• 
  Potentilla intermedia L. Introduced POIN8

  downy cinquefoil · Rosaceae 3 counties
• 
  Potentilla norvegica L. Native PONO3

  Norwegian cinquefoil · Rosaceae 85 counties
• 
  Potentilla norvegica L. ssp. monspeliensis (L.) Asch. & Graebn. Native PONOM

  Norwegian cinquefoil · Rosaceae 85 counties
• ⚘
  Potentilla paradoxa Nutt. Native POPA15

  Paradox cinquefoil · Rosaceae 5 counties