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 701–750 of 2,969 (native).

• 
  Clematis pitcheri Torr. & A. Gray var. pitcheri Native CLPIP

  bluebill · Ranunculaceae 65 counties
• 
  Clematis viorna L. Native CLVI4

  vasevine · Ranunculaceae 5 counties
• 
  Clematis virginiana L. Native CLVI5

  devil's darning needles · Ranunculaceae 62 counties
• 
  Cleome serrulata Pursh Native CLSE

  Rocky Mountain beeplant · Capparaceae 8 counties
• 
  Clinopodium arkansanum (Nutt.) House Native CLAR5

  limestone calamint · Lamiaceae 10 counties
• 
  Clinopodium vulgare L. Native CLVU

  wild basil · Lamiaceae 2 counties
• 
  Clintonia borealis (Aiton) Raf. Native CLBO3

  bluebead · Liliaceae 1 county
• 
  Clitoria mariana L. Native CLMA4

  Atlantic pigeonwings · Fabaceae 12 counties
• 
  Cocculus carolinus (L.) DC. Native COCA

  Carolina coralbead · Menispermaceae 19 counties
• 
  Collinsia verna Nutt. Native COVE2

  spring blue eyed Mary · Scrophulariaceae 49 counties
• 
  Collinsia violacea Nutt. Native COVI2

  violet blue eyed Mary · Scrophulariaceae 2 counties
• 
  Collinsonia canadensis L. Native COCA4

  richweed · Lamiaceae 14 counties
• 
  Collomia linearis Nutt. Native COLI2

  tiny trumpet · Polemoniaceae 15 counties
• 
  Comandra umbellata (L.) Nutt. Native COUM

  bastard toadflax · Santalaceae 75 counties
• 
  Comandra umbellata (L.) Nutt. ssp. umbellata Native COUMU

  bastard toadflax · Santalaceae 75 counties
• 
  Comarum palustre L. Native COPA28

  purple marshlocks · Rosaceae 3 counties
• 
  Commelina diffusa Burm. f. Native CODI5

  climbing dayflower · Commelinaceae 33 counties
• 
  Commelina diffusa Burm. f. var. diffusa Native CODID3

  climbing dayflower · Commelinaceae 33 counties
• 
  Commelina erecta L. Native COER

  whitemouth dayflower · Commelinaceae 34 counties
• 
  Commelina erecta L. var. angustifolia (Michx.) Fernald Native COERA

  whitemouth dayflower · Commelinaceae 3 counties
• 
  Commelina erecta L. var. erecta Native COERE

  whitemouth dayflower · Commelinaceae 1 county
• 
  Commelina virginica L. Native COVI3

  Virginia dayflower · Commelinaceae 19 counties
• 
  Comptonia peregrina (L.) J.M. Coult. Native COPE80

  sweet fern · Myricaceae 6 counties
• 
  Conioselinum chinense (L.) Britton, Sterns & Poggenb. Native COCH2

  eastern hemlockparsley · Apiaceae 2 counties
• 
  Conoclinium coelestinum (L.) DC. Native COCO13

  blue mistflower · Asteraceae 59 counties
• 
  Conopholis americana (L.) Wallr. Native COAM

  American cancer-root · Orobanchaceae 13 counties
• 
  Conyza canadensis (L.) Cronquist Native COCA5

  Canadian horseweed · Asteraceae 102 counties
• 
  Conyza canadensis (L.) Cronquist var. canadensis Native COCAC3

  Canadian horseweed · Asteraceae 102 counties
• 
  Conyza canadensis (L.) Cronquist var. pusilla (Nutt.) Cronquist Native COCAP3

  Canadian horseweed · Asteraceae 1 county
• 
  Conyza ramosissima Cronquist Native CORA4

  dwarf horseweed · Asteraceae 52 counties
• 
  Corallorhiza maculata (Raf.) Raf. Native COMA25

  summer coralroot · Orchidaceae 7 counties
• 
  Corallorhiza maculata (Raf.) Raf. var. maculata Native COMAM7

  summer coralroot · Orchidaceae 7 counties
• 
  Corallorhiza odontorhiza (Willd.) Poir. Native COOD7

  autumn coralroot · Orchidaceae 37 counties
• 
  Corallorhiza odontorhiza (Willd.) Poir. var. odontorhiza Native COODO2

  autumn coralroot · Orchidaceae 37 counties
• 
  Corallorhiza trifida Chatelain Native COTR18

  yellow coralroot · Orchidaceae 1 county
• 
  Corallorhiza wisteriana Conrad Native COWI5

  spring coralroot · Orchidaceae 33 counties
• 
  Coreopsis basalis (A. Dietr.) S.F. Blake Native COBA2

  goldenmane tickseed · Asteraceae 1 county
• 
  Coreopsis grandiflora Hogg ex Sweet Native COGR5

  largeflower tickseed · Asteraceae 8 counties
• 
  Coreopsis lanceolata L. Native COLA5

  lanceleaf tickseed · Asteraceae 34 counties
• 
  Coreopsis palmata Nutt. Native COPA10

  stiff tickseed · Asteraceae 68 counties
• 
  Coreopsis pubescens Elliott Native COPU2

  star tickseed · Asteraceae 4 counties
• 
  Coreopsis pubescens Elliott var. pubescens Native COPUP

  star tickseed · Asteraceae 4 counties
• 
  Coreopsis tinctoria Nutt. Native COTI3

  golden tickseed · Asteraceae 28 counties
• 
  Coreopsis tinctoria Nutt. var. tinctoria Native COTIT

  golden tickseed · Asteraceae 28 counties
• 
  Coreopsis tripteris L. Native COTR4

  tall tickseed · Asteraceae 82 counties
• 
  Corispermum americanum (Nutt.) Nutt. Native COAM8

  American bugseed · Chenopodiaceae 7 counties
• 
  Corispermum americanum (Nutt.) Nutt. var. americanum Native COAMA2

  American bugseed · Chenopodiaceae 7 counties
• 
  Corispermum villosum Rydb. Native COVI5

  hairy bugseed · Chenopodiaceae 7 counties
• 
  Cornus alternifolia L. f. Native COAL2

  alternateleaf dogwood · Cornaceae 35 counties
• 
  Cornus amomum Mill. Native COAM2

  silky dogwood · Cornaceae 69 counties