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 601–650 of 2,969 (native).

• 
  Carya tomentosa (Lam.) Nutt. Native CATO6

  mockernut hickory · Juglandaceae 74 counties
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  Carya ×lecontei Little [aquatica × illinoinensis] Native CALE13

  Leconte hickory · Juglandaceae 1 county
• 
  Castanea dentata (Marshall) Borkh. Native CADE12

  American chestnut · Fagaceae 8 counties
• 
  Castilleja coccinea (L.) Spreng. Native CACO17

  scarlet Indian paintbrush · Scrophulariaceae 37 counties
• 
  Castilleja sessiliflora Pursh Native CASE5

  downy paintedcup · Scrophulariaceae 5 counties
• 
  Catalpa bignonioides Walter Native CABI8

  southern catalpa · Bignoniaceae 19 counties
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  Catalpa speciosa (Warder) Warder ex Engelm. Native CASP8

  northern catalpa · Bignoniaceae 44 counties
• 
  Caulophyllum thalictroides (L.) Michx. Native CATH2

  blue cohosh · Berberidaceae 70 counties
• 
  Cayaponia quinqueloba (Raf.) Shinners Native CAQU3

  fivelobe cucumber · Cucurbitaceae 1 county
• 
  Ceanothus americanus L. Native CEAM

  New Jersey tea · Rhamnaceae 96 counties
• 
  Ceanothus herbaceus Raf. Native CEHE

  Jersey tea · Rhamnaceae 6 counties
• 
  Celastrus scandens L. Native CESC

  American bittersweet · Celastraceae 93 counties
• 
  Celtis laevigata Willd. Native CELA

  sugarberry · Ulmaceae 35 counties
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  Celtis laevigata Willd. var. laevigata Native CELAL

  sugarberry · Ulmaceae 3 counties
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  Celtis laevigata Willd. var. texana Sarg. Native CELAT8

  Texan sugarberry · Ulmaceae 4 counties
• 
  Celtis occidentalis L. Native CEOC

  common hackberry · Ulmaceae 102 counties
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  Celtis pumila Pursh Native CEPU10

  dwarf hackberry · Ulmaceae 20 counties
• 
  Cenchrus longispinus (Hack.) Fernald Native CELO3

  mat sandbur · Poaceae 85 counties
• 
  Centaurea americana Nutt. Native CEAM2

  American star-thistle · Asteraceae 2 counties
• 
  Cephalanthus occidentalis L. Native CEOC2

  common buttonbush · Rubiaceae 96 counties
• 
  Cerastium arvense L. ssp. strictum (L.) Ugborogho Native CEARS2

  field chickweed · Caryophyllaceae 19 counties
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  Cerastium brachypodum (Engelm. ex A. Gray) B.L. Rob. Native CEBR3

  shortstalk chickweed · Caryophyllaceae 28 counties
• 
  Cerastium nutans Raf. Native CENU2

  nodding chickweed · Caryophyllaceae 80 counties
• 
  Cerastium nutans Raf. var. nutans Native CENUN

  nodding chickweed · Caryophyllaceae 80 counties
• 
  Ceratophyllum demersum L. Native CEDE4

  coon's tail · Ceratophyllaceae 79 counties
• 
  Ceratophyllum echinatum A. Gray Native CEEC2

  spineless hornwort · Ceratophyllaceae 9 counties
• 
  Cercis canadensis L. Native CECA4

  eastern redbud · Fabaceae 89 counties
• 
  Cercis canadensis L. var. canadensis Native CECAC

  eastern redbud · Fabaceae 89 counties
• 
  Chaerophyllum procumbens (L.) Crantz Native CHPR

  spreading chervil · Apiaceae 87 counties
• 
  Chaerophyllum procumbens (L.) Crantz var. procumbens Native CHPRP

  spreading chervil · Apiaceae 87 counties
• 
  Chaerophyllum tainturieri Hook. Native CHTA

  hairyfruit chervil · Apiaceae 27 counties
• 
  Chaerophyllum tainturieri Hook. var. tainturieri Native CHTAT

  hairyfruit chervil · Apiaceae 26 counties
• 
  Chamaecrista fasciculata (Michx.) Greene Native CHFA2

  partridge pea · Fabaceae 96 counties
• 
  Chamaecrista fasciculata (Michx.) Greene var. fasciculata Native CHFAF

  partridge pea · Fabaceae 96 counties
• 
  Chamaecrista nictitans (L.) Moench Native CHNI2

  sensitive partridge pea · Fabaceae 35 counties
• 
  Chamaecrista nictitans (L.) Moench ssp. nictitans Native CHNIN

  sensitive partridge pea · Fabaceae 35 counties
• 
  Chamaecrista nictitans (L.) Moench ssp. nictitans var. nictitans Native CHNIN2

  sensitive partridge pea · Fabaceae 35 counties
• 
  Chamaedaphne calyculata (L.) Moench Native CHCA2

  leatherleaf · Ericaceae 4 counties
• 
  Chamaelirium luteum (L.) A. Gray Native CHLU

  fairywand · Liliaceae 4 counties
• 
  Chamaesyce geyeri (Engelm. & A. Gray) Small Native CHGE2

  Geyer's sandmat · Euphorbiaceae 17 counties
• 
  Chamaesyce geyeri (Engelm. & A. Gray) Small var. geyeri Native CHGEG

  Geyer's sandmat · Euphorbiaceae 17 counties
• 
  Chamaesyce glyptosperma (Engelm.) Small Native CHGL13

  ribseed sandmat · Euphorbiaceae 17 counties
• 
  Chamaesyce humistrata (Engelm. ex A. Gray) Small Native CHHU3

  spreading sandmat · Euphorbiaceae 43 counties
• 
  Chamaesyce maculata (L.) Small Native CHMA15

  spotted sandmat · Euphorbiaceae 102 counties
• 
  Chamaesyce nutans (Lag.) Small Native CHNU9

  eyebane · Euphorbiaceae 3 counties
• 
  Chamaesyce polygonifolia (L.) Small Native CHPO6

  seaside sandmat · Euphorbiaceae 3 counties
• 
  Chamaesyce prostrata (Aiton) Small Native CHPR6

  prostrate sandmat · Euphorbiaceae 1 county
• 
  Chamaesyce serpens (Kunth) Small Native CHSE4

  matted sandmat · Euphorbiaceae 16 counties
• 
  Chamaesyce serpyllifolia (Pers.) Small Native CHSE6

  thymeleaf sandmat · Euphorbiaceae 1 county
• 
  Chamaesyce serpyllifolia (Pers.) Small ssp. serpyllifolia Native CHSES

  thymeleaf sandmat · Euphorbiaceae 1 county