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 2,751–2,800 of 3,775.

• 
  Potentilla recta L. Introduced PORE5

  sulphur cinquefoil · Rosaceae 92 counties
• 
  Potentilla reptans L. Introduced PORE6

  creeping cinquefoil · Rosaceae 1 county
• 
  Potentilla rivalis Nutt. Native PORI3

  brook cinquefoil · Rosaceae 4 counties
• 
  Potentilla simplex Michx. Native POSI2

  common cinquefoil · Rosaceae 102 counties
• 
  Prenanthes alba L. Native PRAL2

  white rattlesnakeroot · Asteraceae 36 counties
• 
  Prenanthes altissima L. Native PRAL3

  tall rattlesnakeroot · Asteraceae 26 counties
• 
  Prenanthes aspera Michx. Native PRAS

  rough rattlesnakeroot · Asteraceae 51 counties
• 
  Prenanthes crepidinea Michx. Native PRCR

  nodding rattlesnakeroot · Asteraceae 28 counties
• 
  Prenanthes racemosa Michx. Native PRRA

  purple rattlesnakeroot · Asteraceae 27 counties
• 
  Prenanthes racemosa Michx. var. racemosa Native PRRAR3

  purple rattlesnakeroot · Asteraceae 1 county
• 
  Primula mistassinica Michx. Native PRMI

  Mistassini primrose · Primulaceae 1 county
• 
  Proboscidea louisianica (Mill.) Thell. Native PRLO

  ram's horn · Pedaliaceae 19 counties
• 
  Proboscidea louisianica (Mill.) Thell. ssp. louisianica Native PRLOL

  ram's horn · Pedaliaceae 19 counties
• 
  Proserpinaca palustris L. Native PRPA3

  marsh mermaidweed · Haloragaceae 31 counties
• 
  Proserpinaca palustris L. var. amblyogona Fernald Native PRPAA

  marsh mermaidweed · Haloragaceae 1 county
• 
  Proserpinaca palustris L. var. crebra Fernald & Grisc. Native PRPAC

  marsh mermaidweed · Haloragaceae 2 counties
• 
  Prunella vulgaris L. Native PRVU

  common selfheal · Lamiaceae 102 counties
• 
  Prunella vulgaris L. ssp. lanceolata (W. Bartram) Hultén Native PRVUL2

  lance selfheal · Lamiaceae 102 counties
• 
  Prunus americana Marshall Native PRAM

  American plum · Rosaceae 89 counties
• 
  Prunus angustifolia Marshall Native PRAN3

  Chickasaw plum · Rosaceae 33 counties
• 
  Prunus angustifolia Marshall var. angustifolia Native PRANA

  Chickasaw plum · Rosaceae 33 counties
• 
  Prunus armeniaca L. Introduced PRAR3

  apricot · Rosaceae 1 county
• 
  Prunus avium (L.) L. Introduced PRAV

  sweet cherry · Rosaceae 1 county
• 
  Prunus cerasus L. Introduced PRCE

  sour cherry · Rosaceae 3 counties
• 
  Prunus hortulana L.H. Bailey Native PRHO

  hortulan plum · Rosaceae 50 counties
• 
  Prunus mahaleb L. Introduced PRMA

  Mahaleb cherry · Rosaceae 13 counties
• 
  Prunus mexicana S. Watson Native PRME

  Mexican plum · Rosaceae 57 counties
• 
  Prunus munsoniana W. Wight & Hedrick Native PRMU

  wild goose plum · Rosaceae 18 counties
• 
  Prunus nigra Aiton Native PRNI

  Canadian plum · Rosaceae 11 counties
• 
  Prunus padus L. Introduced PRPA5

  European bird cherry · Rosaceae 1 county
• 
  Prunus pensylvanica L. f. Native PRPE2

  pin cherry · Rosaceae 15 counties
• 
  Prunus pensylvanica L. f. var. pensylvanica Native PRPEP

  pin cherry · Rosaceae 15 counties
• 
  Prunus persica (L.) Batsch Introduced PRPE3

  peach · Rosaceae 31 counties
• 
  Prunus persica (L.) Batsch var. persica Introduced PRPEP2

  peach · Rosaceae 31 counties
• 
  Prunus pumila L. Native PRPU3

  sandcherry · Rosaceae 9 counties
• 
  Prunus serotina Ehrh. Native PRSE2

  black cherry · Rosaceae 102 counties
• 
  Prunus serotina Ehrh. var. serotina Native PRSES

  black cherry · Rosaceae 102 counties
• 
  Prunus susquehanae hort. ex Willd. Native PRSU3

  Sesquehana sandcherry · Rosaceae 9 counties
• 
  Prunus virginiana L. Native PRVI

  chokecherry · Rosaceae 54 counties
• 
  Pseudognaphalium helleri (Britton) Anderb. Native PSHE4

  Heller's cudweed · Asteraceae 1 county
• 
  Pseudognaphalium helleri (Britton) Anderb. ssp. micradenium (Weath.) Kartesz Native PSHEM

  Heller's cudweed · Asteraceae 1 county
• 
  Pseudognaphalium macounii (Greene) Kartesz Native PSMA11

  Macoun's cudweed · Asteraceae 1 county
• 
  Pseudognaphalium obtusifolium (L.) Hilliard & B.L. Burtt Native PSOB3

  rabbit-tobacco · Asteraceae 96 counties
• 
  Pseudognaphalium obtusifolium (L.) Hilliard & B.L. Burtt ssp. obtusifolium Native PSOBO

  rabbit-tobacco · Asteraceae 95 counties
• ⚘
  Pseudolysimachion longifolium (L.) Opiz Introduced PSLO6

  longleaf speedwell · Scrophulariaceae 2 counties
• 
  Psoralidium tenuiflorum (Pursh) Rydb. Native PSTE5

  slimflower scurfpea · Fabaceae 34 counties
• 
  Ptelea trifoliata L. Native PTTR

  common hoptree · Rutaceae 86 counties
• 
  Ptelea trifoliata L. ssp. trifoliata Native PTTRT

  common hoptree · Rutaceae 86 counties
• 
  Ptelea trifoliata L. ssp. trifoliata var. mollis Torr. & A. Gray Native PTTRM

  common hoptree · Rutaceae 4 counties
• 
  Ptelea trifoliata L. ssp. trifoliata var. trifoliata Native PTTRT2

  common hoptree · Rutaceae 84 counties