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 501–550 of 766 (introduced).

• 
  Perilla frutescens (L.) Britton var. crispa (Benth.) Deane Introduced PEFRC2

  beefsteakplant · Lamiaceae 2 counties
• 
  Perilla frutescens (L.) Britton var. frutescens Introduced PEFRF2

  beefsteakplant · Lamiaceae 3 counties
• 
  Petasites hybridus (L.) G. Gaertn., B. Mey. & Scherb. Introduced PEHY

  pestilence wort · Asteraceae 2 counties
• 
  Petrorhagia saxifraga (L.) Link Introduced PESA9

  saxifrage pink · Caryophyllaceae 1 county
• 
  Petunia axillaris (Lam.) Britton, Sterns & Poggenb. Introduced PEAX

  large white petunia · Solanaceae 14 counties
• 
  Petunia integrifolia (Hook.) Schinz & Thell. Introduced PEIN5

  violetflower petunia · Solanaceae 6 counties
• ⚘
  Petunia ×atkinsiana D. Don ex Loudon [axillaris × integrifolia] Introduced PEAT7

  petunia · Solanaceae 6 counties
• 
  Phalaris canariensis L. Introduced PHCA5

  annual canarygrass · Poaceae 15 counties
• 
  Philadelphus coronarius L. Introduced PHCO7

  sweet mock orange · Hydrangeaceae 1 county
• 
  Phleum pratense L. Introduced PHPR3

  timothy · Poaceae 102 counties
• 
  Phragmites australis (Cav.) Trin. ex Steud. ssp. australis Introduced PHAUA7

  European common reed · Poaceae 9 counties
• 
  Phyllanthus urinaria L. Introduced PHUR

  chamber bitter · Euphorbiaceae 1 county
• 
  Physalis alkekengi L. Introduced PHAL5

  strawberry groundcherry · Solanaceae 2 counties
• 
  Physalis philadelphica Lam. Introduced PHPH2

  Mexican groundcherry · Solanaceae 9 counties
• 
  Physalis philadelphica Lam. var. immaculata Waterf. Introduced PHPHI

  Mexican groundcherry · Solanaceae 9 counties
• 
  Picea abies (L.) Karst. Introduced PIAB

  Norway spruce · Pinaceae 1 county
• 
  Picris echioides L. Introduced PIEC

  bristly oxtongue · Asteraceae 1 county
• 
  Picris hieracioides L. ssp. hieracioides Introduced PIHIH

  hawkweed oxtongue · Asteraceae 1 county
• 
  Pinus nigra Arnold Introduced PINI

  Austrian pine · Pinaceae 1 county
• 
  Pinus sylvestris L. Introduced PISY

  Scots pine · Pinaceae 4 counties
• 
  Pinus wallichiana A.B. Jacks. Introduced PIWA3

  Bhutan pine · Pinaceae 1 county
• 
  Pisum sativum L. Introduced PISA6

  garden pea · Fabaceae 4 counties
• 
  Plantago arenaria Waldst. & Kit. Introduced PLAR6

  sand plantain · Plantaginaceae 7 counties
• 
  Plantago lanceolata L. Introduced PLLA

  narrowleaf plantain · Plantaginaceae 102 counties
• 
  Plantago major L. Introduced PLMA2

  common plantain · Plantaginaceae 30 counties
• 
  Plantago media L. Introduced PLME

  hoary plantain · Plantaginaceae 1 county
• 
  Poa annua L. Introduced POAN

  annual bluegrass · Poaceae 77 counties
• 
  Poa bulbosa L. Introduced POBU

  bulbous bluegrass · Poaceae 5 counties
• 
  Poa compressa L. Introduced POCO

  Canada bluegrass · Poaceae 102 counties
• 
  Poa pratensis L. ssp. pratensis Introduced POPRP2

  Kentucky bluegrass · Poaceae 102 counties
• 
  Poa trivialis L. Introduced POTR2

  rough bluegrass · Poaceae 5 counties
• 
  Polycnemum majus A. Braun Introduced POMA24

  giant needleleaf · Chenopodiaceae 1 county
• 
  Polygonum arenastrum Jord. ex Boreau Introduced POAR11

  oval-leaf knotweed · Polygonaceae 102 counties
• 
  Polygonum aviculare L. Introduced POAV

  prostrate knotweed · Polygonaceae 5 counties
• 
  Polygonum bellardii All. Introduced POBE

  narrowleaf knotweed · Polygonaceae 5 counties
• 
  Polygonum cespitosum Blume var. longisetum (Bruijn) A.N. Steward Introduced POCEL

  Oriental lady's thumb · Polygonaceae 19 counties
• 
  Polygonum cespitosum Blume, nom. inq. Introduced POCE4

  Oriental lady's thumb · Polygonaceae 19 counties
• 
  Polygonum convolvulus L. Introduced POCO10

  black bindweed · Polygonaceae 85 counties
• 
  Polygonum convolvulus L. var. convolvulus Introduced POCOC2

  black bindweed · Polygonaceae 85 counties
• 
  Polygonum cuspidatum Siebold & Zucc. Introduced POCU6

  Japanese knotweed · Polygonaceae 33 counties
• 
  Polygonum hydropiper L. Introduced POHY

  marshpepper knotweed · Polygonaceae 75 counties
• 
  Polygonum orientale L. Introduced POOR2

  kiss me over the garden gate · Polygonaceae 27 counties
• 
  Polygonum persicaria L. Introduced POPE3

  spotted ladysthumb · Polygonaceae 90 counties
• 
  Polygonum sachalinense F. Schmidt ex Maxim. Introduced POSA4

  giant knotweed · Polygonaceae 2 counties
• 
  Populus alba L. Introduced POAL7

  white poplar · Salicaceae 57 counties
• 
  Populus nigra L. Introduced PONI

  Lombardy poplar · Salicaceae 7 counties
• ⚘
  Populus ×canescens (Aiton) Sm. (pro sp.) [alba × tremula] Introduced POCA14

  gray poplar · Salicaceae 4 counties
• 
  Portulaca grandiflora Hook. Introduced POGR7

  rose moss · Portulacaceae 3 counties
• 
  Potamogeton crispus L. Introduced POCR3

  curly pondweed · Potamogetonaceae 42 counties
• 
  Potentilla argentea L. Introduced POAR8

  silver cinquefoil · Rosaceae 25 counties