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 2,501–2,550 of 2,969 (native).

• 
  Selaginella rupestris (L.) Spring Native SERU

  northern selaginella · Selaginellaceae 12 counties
• 
  Senna hebecarpa (Fernald) Irwin & Barneby Native SEHE3

  American senna · Fabaceae 38 counties
• 
  Senna marilandica (L.) Link Native SEMA11

  Maryland senna · Fabaceae 60 counties
• 
  Senna obtusifolia (L.) Irwin & Barneby Native SEOB4

  Java-bean · Fabaceae 6 counties
• 
  Sericocarpus linifolius (L.) Britton, Sterns & Poggenb. Native SELI5

  narrowleaf whitetop aster · Asteraceae 1 county
• 
  Sesbania herbacea (Mill.) McVaugh Native SEHE8

  bigpod sesbania · Fabaceae 3 counties
• 
  Setaria parviflora (Poir.) Kerguélen Native SEPA10

  marsh bristlegrass · Poaceae 13 counties
• 
  Shepherdia canadensis (L.) Nutt. Native SHCA

  russet buffaloberry · Elaeagnaceae 2 counties
• 
  Sibara virginica (L.) Rollins Native SIVI2

  Virginia winged rockcress · Brassicaceae 60 counties
• 
  Sibbaldiopsis tridentata (Aiton) Rydb. Native SITR3

  shrubby fivefingers · Rosaceae 1 county
• 
  Sicyos angulatus L. Native SIAN

  oneseed bur cucumber · Cucurbitaceae 65 counties
• 
  Sida elliottii Torr. & A. Gray Native SIEL

  Elliott's fanpetals · Malvaceae 3 counties
• 
  Sida elliottii Torr. & A. Gray var. elliottii Native SIELE

  Elliott's fanpetals · Malvaceae 2 counties
• 
  Sida spinosa L. Native SISP

  prickly fanpetals · Malvaceae 85 counties
• 
  Sideroxylon lanuginosum Michx. Native SILA20

  gum bully · Sapotaceae 5 counties
• 
  Sideroxylon lanuginosum Michx. ssp. oblongifolium (Nutt.) T.D. Penn. Native SILAO

  gum bully · Sapotaceae 5 counties
• 
  Sideroxylon lycioides L. Native SILY

  buckthorn bully · Sapotaceae 7 counties
• 
  Silene antirrhina L. Native SIAN2

  sleepy silene · Caryophyllaceae 91 counties
• 
  Silene nivea (Nutt.) Muhl. ex Otth Native SINI

  evening campion · Caryophyllaceae 42 counties
• 
  Silene ovata Pursh Native SIOV

  Blue Ridge catchfly · Caryophyllaceae 1 county
• 
  Silene regia Sims Native SIRE2

  royal catchfly · Caryophyllaceae 11 counties
• 
  Silene stellata (L.) W.T. Aiton Native SIST

  widowsfrill · Caryophyllaceae 90 counties
• 
  Silene virginica L. Native SIVI4

  fire pink · Caryophyllaceae 17 counties
• 
  Silene virginica L. var. virginica Native SIVIV

  fire pink · Caryophyllaceae 17 counties
• 
  Silphium integrifolium Michx. Native SIIN2

  wholeleaf rosinweed · Asteraceae 94 counties
• 
  Silphium integrifolium Michx. var. integrifolium Native SIINI

  wholeleaf rosinweed · Asteraceae 2 counties
• 
  Silphium integrifolium Michx. var. laeve Torr. & A. Gray Native SIINL

  wholeleaf rosinweed · Asteraceae 1 county
• 
  Silphium laciniatum L. Native SILA3

  compassplant · Asteraceae 87 counties
• 
  Silphium laciniatum L. var. laciniatum Native SILAL2

  compassplant · Asteraceae 86 counties
• 
  Silphium laciniatum L. var. robinsonii L.M. Perry Native SILAR

  Robinson's compassplant · Asteraceae 2 counties
• 
  Silphium perfoliatum L. Native SIPE2

  cup plant · Asteraceae 89 counties
• 
  Silphium perfoliatum L. var. perfoliatum Native SIPEP

  cup plant · Asteraceae 89 counties
• 
  Silphium terebinthinaceum Jacq. Native SITE

  prairie rosinweed · Asteraceae 91 counties
• 
  Silphium terebinthinaceum Jacq. var. terebinthinaceum Native SITET

  prairie rosinweed · Asteraceae 3 counties
• ⚘
  Silphium trifoliatum L. Native SITR7

  whorled rosinweed · Asteraceae 2 counties
• ⚘
  Silphium trifoliatum L. var. trifoliatum Native SITRT

  whorled rosinweed · Asteraceae 2 counties
• 
  Sisyrinchium albidum Raf. Native SIAL3

  white blue-eyed grass · Iridaceae 83 counties
• 
  Sisyrinchium angustifolium Mill. Native SIAN3

  narrowleaf blue-eyed grass · Iridaceae 76 counties
• 
  Sisyrinchium atlanticum E.P. Bicknell Native SIAT

  eastern blue-eyed grass · Iridaceae 8 counties
• 
  Sisyrinchium campestre E.P. Bicknell Native SICA9

  prairie blue-eyed grass · Iridaceae 42 counties
• 
  Sisyrinchium montanum Greene Native SIMO2

  strict blue-eyed grass · Iridaceae 4 counties
• 
  Sisyrinchium montanum Greene var. crebrum Fernald Native SIMOC

  strict blue-eyed grass · Iridaceae 1 county
• 
  Sisyrinchium montanum Greene var. montanum Native SIMOM

  strict blue-eyed grass · Iridaceae 3 counties
• 
  Sisyrinchium mucronatum Michx. Native SIMU3

  needletip blue-eyed grass · Iridaceae 6 counties
• 
  Sium suave Walter Native SISU2

  hemlock waterparsnip · Apiaceae 69 counties
• 
  Smallanthus uvedalius (L.) Mack. ex Small Native SMUV

  hairy leafcup · Asteraceae 15 counties
• 
  Smilax bona-nox L. Native SMBO2

  saw greenbrier · Smilacaceae 15 counties
• 
  Smilax bona-nox L. var. bona-nox Native SMBOB2

  saw greenbrier · Smilacaceae 15 counties
• 
  Smilax ecirrhata (Engelm. ex Kunth) S. Watson Native SMEC

  upright carrionflower · Smilacaceae 62 counties
• 
  Smilax glauca Walter Native SMGL

  cat greenbrier · Smilacaceae 19 counties