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 651–700 of 2,969 (native).

• 
  Chamaesyce vermiculata (Raf.) House Native CHVE5

  wormseed sandmat · Euphorbiaceae 1 county
• 
  Chamerion angustifolium (L.) Holub Native CHAN9

  fireweed · Onagraceae 7 counties
• 
  Chamerion angustifolium (L.) Holub ssp. angustifolium Native CHANA2

  fireweed · Onagraceae 1 county
• 
  Chamerion angustifolium (L.) Holub ssp. circumvagum (Mosquin) Hoch Native CHANC

  fireweed · Onagraceae 7 counties
• 
  Chasmanthium latifolium (Michx.) Yates Native CHLA5

  Indian woodoats · Poaceae 54 counties
• 
  Cheilanthes feei T. Moore Native CHFE

  slender lipfern · Pteridaceae 18 counties
• 
  Cheilanthes lanosa (Michx.) D.C. Eaton Native CHLA2

  hairy lipfern · Pteridaceae 17 counties
• 
  Chelone glabra L. Native CHGL2

  white turtlehead · Scrophulariaceae 50 counties
• 
  Chelone obliqua L. Native CHOB3

  red turtlehead · Scrophulariaceae 28 counties
• 
  Chelone obliqua L. var. speciosa Pennell & Wherry Native CHOBS

  red turtlehead · Scrophulariaceae 28 counties
• 
  Chenopodium album L. var. missouriense (Aellen) I.J. Bassett & C.W. Crompton Native CHALM2

  Missouri lambsquarters · Chenopodiaceae 14 counties
• 
  Chenopodium album L. var. striatum Krašan Native CHALS2

  lateflowering goosefoot · Chenopodiaceae 2 counties
• 
  Chenopodium berlandieri Moq. Native CHBE4

  pitseed goosefoot · Chenopodiaceae 27 counties
• 
  Chenopodium berlandieri Moq. var. bushianum (Aellen) Cronquist Native CHBEB3

  Bush's goosefoot · Chenopodiaceae 15 counties
• 
  Chenopodium berlandieri Moq. var. zschackii (Murr) Murr ex Asch. Native CHBEZ

  Zschack's goosefoot · Chenopodiaceae 15 counties
• 
  Chenopodium capitatum (L.) Asch. Native CHCA4

  blite goosefoot · Chenopodiaceae 1 county
• 
  Chenopodium pallescens Standl. Native CHPA5

  slimleaf goosefoot · Chenopodiaceae 13 counties
• 
  Chenopodium pratericola Rydb. Native CHPR5

  desert goosefoot · Chenopodiaceae 43 counties
• 
  Chenopodium rubrum L. Native CHRU

  red goosefoot · Chenopodiaceae 1 county
• 
  Chenopodium simplex (Torr.) Raf. Native CHSI2

  mapleleaf goosefoot · Chenopodiaceae 53 counties
• 
  Chenopodium standleyanum Aellen Native CHST2

  Standley's goosefoot · Chenopodiaceae 59 counties
• 
  Chimaphila maculata (L.) Pursh Native CHMA3

  striped prince's pine · Pyrolaceae 3 counties
• 
  Chimaphila umbellata (L.) W.P.C. Barton Native CHUM

  pipsissewa · Pyrolaceae 3 counties
• 
  Chimaphila umbellata (L.) W.P.C. Barton ssp. cisatlantica (S.F. Blake) Hultén Native CHUMC2

  pipsissewa · Pyrolaceae 3 counties
• 
  Chloris verticillata Nutt. Native CHVE2

  tumble windmill grass · Poaceae 20 counties
• 
  Cicuta bulbifera L. Native CIBU

  bulblet-bearing water hemlock · Apiaceae 18 counties
• 
  Cicuta maculata L. Native CIMA2

  spotted water hemlock · Apiaceae 100 counties
• 
  Cicuta maculata L. var. maculata Native CIMAM

  spotted water hemlock · Apiaceae 2 counties
• 
  Cinna arundinacea L. Native CIAR2

  sweet woodreed · Poaceae 92 counties
• 
  Cinna latifolia (Trevis. ex Goepp.) Griseb. Native CILA2

  drooping woodreed · Poaceae 2 counties
• 
  Circaea alpina L. Native CIAL

  small enchanter's nightshade · Onagraceae 4 counties
• 
  Circaea alpina L. ssp. alpina Native CIALA

  small enchanter's nightshade · Onagraceae 4 counties
• 
  Circaea lutetiana L. Native CILU

  broadleaf enchanter's nightshade · Onagraceae 89 counties
• 
  Circaea lutetiana L. ssp. canadensis (L.) Asch. & Magnus Native CILUC

  broadleaf enchanter's nightshade · Onagraceae 89 counties
• ⚘
  Circaea ×intermedia Ehrh. (pro sp.) [alpina × lutetiana] Native CIIN4

  enchanter's nightshade · Onagraceae 2 counties
• 
  Cirsium altissimum (L.) Hill Native CIAL2

  tall thistle · Asteraceae 77 counties
• 
  Cirsium carolinianum (Walter) Fernald & B.G. Schub. Native CICA7

  soft thistle · Asteraceae 6 counties
• 
  Cirsium discolor (Muhl. ex Willd.) Spreng. Native CIDI

  field thistle · Asteraceae 101 counties
• ⚘
  Cirsium hillii (Canby) Fernald Native CIHI

  Hill's thistle · Asteraceae 36 counties
• 
  Cirsium muticum Michx. Native CIMU

  swamp thistle · Asteraceae 17 counties
• 
  Cirsium pitcheri (Torr. ex Eaton) Torr. & A. Gray Native CIPI

  sand dune thistle · Asteraceae 2 counties
• 
  Cladium mariscoides (Muhl.) Torr. Native CLMA

  smooth sawgrass · Cyperaceae 3 counties
• 
  Cladrastis kentukea (Dum. Cours.) Rudd Native CLKE

  Kentucky yellowwood · Fabaceae 2 counties
• 
  Claytonia virginica L. Native CLVI3

  Virginia springbeauty · Portulacaceae 98 counties
• 
  Claytonia virginica L. var. virginica Native CLVIV

  Virginia springbeauty · Portulacaceae 7 counties
• 
  Claytonia virginica L. var. virginica f. virginica Native CLVIV2

  Virginia springbeauty · Portulacaceae 7 counties
• 
  Clematis crispa L. Native CLCR

  swamp leather flower · Ranunculaceae 4 counties
• 
  Clematis occidentalis (Hornem.) DC. Native CLOC2

  western blue virginsbower · Ranunculaceae 1 county
• 
  Clematis occidentalis (Hornem.) DC. var. occidentalis Native CLOCO

  western blue virginsbower · Ranunculaceae 1 county
• 
  Clematis pitcheri Torr. & A. Gray Native CLPI

  bluebill · Ranunculaceae 65 counties