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 1,051–1,100 of 3,775.

• 
  Cymbalaria muralis G. Gaertn., B. Mey. & Scherb. Introduced CYMU

  Kenilworth ivy · Scrophulariaceae 4 counties
• 
  Cynanchum laeve (Michx.) Pers. Native CYLA

  honeyvine · Asclepiadaceae 73 counties
• 
  Cynanchum louiseae Kartesz & Gandhi Introduced CYLO11

  Louise's swallow-wort · Asclepiadaceae 7 counties
• 
  Cynodon dactylon (L.) Pers. Introduced CYDA

  Bermudagrass · Poaceae 29 counties
• 
  Cynoglossum officinale L. Introduced CYOF

  gypsyflower · Boraginaceae 60 counties
• 
  Cynoglossum virginianum L. Native CYVI

  wild comfrey · Boraginaceae 27 counties
• 
  Cynoglossum virginianum L. var. virginianum Native CYVIV

  wild comfrey · Boraginaceae 25 counties
• 
  Cynosciadium digitatum DC. Native CYDI2

  finger dogshade · Apiaceae 1 county
• 
  Cyperus acuminatus Torr. & Hook. ex Torr. Native CYAC2

  tapertip flatsedge · Cyperaceae 58 counties
• 
  Cyperus bipartitus Torr. Native CYBI6

  slender flatsedge · Cyperaceae 53 counties
• 
  Cyperus compressus L. Native CYCO

  poorland flatsedge · Cyperaceae 2 counties
• 
  Cyperus croceus Vahl Native CYCR6

  Baldwin's flatsedge · Cyperaceae 1 county
• 
  Cyperus dentatus Torr. Native CYDE2

  toothed flatsedge · Cyperaceae 1 county
• 
  Cyperus diandrus Torr. Native CYDI3

  umbrella flatsedge · Cyperaceae 24 counties
• 
  Cyperus echinatus (L.) Alph. Wood Native CYEC2

  globe flatsedge · Cyperaceae 40 counties
• 
  Cyperus erythrorhizos Muhl. Native CYER2

  redroot flatsedge · Cyperaceae 61 counties
• 
  Cyperus esculentus L. Both CYES

  yellow nutsedge · Cyperaceae 102 counties
• 
  Cyperus esculentus L. var. leptostachyus Boeckeler Introduced CYESL

  yellow nutsedge · Cyperaceae 102 counties
• 
  Cyperus filicinus Vahl Native CYFI

  fern flatsedge · Cyperaceae 1 county
• 
  Cyperus flavescens L. Native CYFL

  yellow flatsedge · Cyperaceae 15 counties
• 
  Cyperus grayoides Mohlenbr. Native CYGR11

  Illinois flatsedge · Cyperaceae 8 counties
• 
  Cyperus houghtonii Torr. Native CYHO

  Houghton's flatsedge · Cyperaceae 9 counties
• 
  Cyperus hystricinus Fernald Native CYHY

  bristly flatsedge · Cyperaceae 1 county
• 
  Cyperus iria L. Introduced CYIR

  ricefield flatsedge · Cyperaceae 2 counties
• 
  Cyperus lancastriensis Porter ex A. Gray Native CYLA3

  manyflower flatsedge · Cyperaceae 6 counties
• 
  Cyperus lupulinus (Spreng.) Marcks Native CYLU2

  Great Plains flatsedge · Cyperaceae 66 counties
• 
  Cyperus lupulinus (Spreng.) Marcks ssp. lupulinus Native CYLUL

  Great Plains flatsedge · Cyperaceae 45 counties
• 
  Cyperus lupulinus (Spreng.) Marcks ssp. macilentus (Fernald) Marcks Native CYLUM

  Great Plains flatsedge · Cyperaceae 54 counties
• 
  Cyperus odoratus L. Native CYOD

  fragrant flatsedge · Cyperaceae 66 counties
• 
  Cyperus plukenetii Fernald Native CYPL3

  Plukenet's flatsedge · Cyperaceae 1 county
• 
  Cyperus polystachyos Rottb. Native CYPO

  manyspike flatsedge · Cyperaceae 2 counties
• 
  Cyperus polystachyos Rottb. var. texensis (Torr.) Fernald Native CYPOT

  Texan flatsedge · Cyperaceae 2 counties
• 
  Cyperus pseudovegetus Steud. Native CYPS

  marsh flatsedge · Cyperaceae 21 counties
• 
  Cyperus refractus Engelm. ex Boeckeler Native CYRE3

  reflexed flatsedge · Cyperaceae 1 county
• 
  Cyperus retroflexus Buckley Native CYRE14

  oneflower flatsedge · Cyperaceae 1 county
• 
  Cyperus retrorsus Chapm. Native CYRE5

  pine barren flatsedge · Cyperaceae 1 county
• 
  Cyperus retrorsus Chapm. var. retrorsus Native CYRER2

  pine barren flatsedge · Cyperaceae 1 county
• 
  Cyperus schweinitzii Torr. Native CYSC3

  Schweinitz's flatsedge · Cyperaceae 36 counties
• 
  Cyperus squarrosus L. Native CYSQ

  bearded flatsedge · Cyperaceae 73 counties
• 
  Cyperus strigosus L. Native CYST

  strawcolored flatsedge · Cyperaceae 102 counties
• 
  Cypripedium acaule Aiton Native CYAC3

  moccasin flower · Orchidaceae 5 counties
• 
  Cypripedium candidum Muhl. ex Willd. Native CYCA5

  white lady's slipper · Orchidaceae 23 counties
• 
  Cypripedium parviflorum Salisb. Native CYPA19

  lesser yellow lady's slipper · Orchidaceae 54 counties
• 
  Cypripedium parviflorum Salisb. var. parviflorum Native CYPAP4

  lesser yellow lady's slipper · Orchidaceae 1 county
• 
  Cypripedium parviflorum Salisb. var. pubescens (Willd.) Knight Native CYPAP3

  greater yellow lady's slipper · Orchidaceae 53 counties
• 
  Cypripedium reginae Walter Native CYRE6

  showy lady's slipper · Orchidaceae 18 counties
• ⚘
  Cypripedium ×andrewsii A.M. Fuller (pro nm.) var. favillianum (J.T. Curtis) B. Boivin (pro nm.) [candidum × parviflorum var. pubescens] Native CYANF

  hybrid ladyslipper · Orchidaceae 3 counties
• ⚘
  Cypripedium ×andrewsii A.M. Fuller [candidum × parviflorum] Native CYAN2

  hybrid ladyslipper · Orchidaceae 5 counties
• 
  Cystopteris bulbifera (L.) Bernh. Native CYBU3

  bulblet bladderfern · Dryopteridaceae 45 counties
• 
  Cystopteris fragilis (L.) Bernh. Native CYFR2

  brittle bladderfern · Dryopteridaceae 2 counties