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 766 (introduced).

• 
  Setaria viridis (L.) P. Beauv. var. viridis Introduced SEVIV

  green bristlegrass · Poaceae 102 counties
• 
  Sherardia arvensis L. Introduced SHAR2

  blue fieldmadder · Rubiaceae 1 county
• 
  Silene armeria L. Introduced SIAR

  sweet William silene · Caryophyllaceae 10 counties
• 
  Silene csereii Baumg. Introduced SICS

  Balkan catchfly · Caryophyllaceae 35 counties
• 
  Silene dichotoma Ehrh. Introduced SIDI2

  forked catchfly · Caryophyllaceae 9 counties
• 
  Silene dioica (L.) Clairville Introduced SIDI4

  red catchfly · Caryophyllaceae 5 counties
• 
  Silene latifolia Poir. Introduced SILA21

  bladder campion · Caryophyllaceae 58 counties
• 
  Silene latifolia Poir. ssp. alba (Mill.) Greuter & Burdet Introduced SILAA3

  bladder campion · Caryophyllaceae 58 counties
• 
  Silene noctiflora L. Introduced SINO

  nightflowering silene · Caryophyllaceae 18 counties
• 
  Silene vulgaris (Moench) Garcke Introduced SIVU

  maidenstears · Caryophyllaceae 25 counties
• 
  Sinapis alba L. Introduced SIAL5

  white mustard · Brassicaceae 15 counties
• 
  Sinapis arvensis L. Introduced SIAR4

  charlock mustard · Brassicaceae 48 counties
• 
  Sinapis arvensis L. ssp. arvensis Introduced SIARA

  wild mustard · Brassicaceae 48 counties
• 
  Sisymbrium altissimum L. Introduced SIAL2

  tall tumblemustard · Brassicaceae 65 counties
• 
  Sisymbrium loeselii L. Introduced SILO3

  small tumbleweed mustard · Brassicaceae 12 counties
• 
  Sisymbrium officinale (L.) Scop. Introduced SIOF

  hedgemustard · Brassicaceae 75 counties
• 
  Solanum dulcamara L. Introduced SODU

  climbing nightshade · Solanaceae 39 counties
• 
  Solanum dulcamara L. var. dulcamara Introduced SODUD

  climbing nightshade · Solanaceae 1 county
• 
  Solanum lycopersicum L. Introduced SOLY2

  garden tomato · Solanaceae 27 counties
• 
  Solanum lycopersicum L. var. lycopersicum Introduced SOLYL

  garden tomato · Solanaceae 27 counties
• 
  Solanum physalifolium Rusby Introduced SOPH

  hoe nightshade · Solanaceae 2 counties
• 
  Solanum tuberosum L. Introduced SOTU

  Irish potato · Solanaceae 2 counties
• 
  Sonchus arvensis L. Introduced SOAR2

  field sowthistle · Asteraceae 36 counties
• 
  Sonchus arvensis L. ssp. arvensis Introduced SOARA2

  field sowthistle · Asteraceae 15 counties
• 
  Sonchus arvensis L. ssp. uliginosus (M. Bieb.) Nyman Introduced SOARU

  moist sowthistle · Asteraceae 32 counties
• 
  Sonchus asper (L.) Hill Introduced SOAS

  spiny sowthistle · Asteraceae 46 counties
• 
  Sonchus oleraceus L. Introduced SOOL

  common sowthistle · Asteraceae 55 counties
• 
  Sorbus aucuparia L. Introduced SOAU

  European mountain ash · Rosaceae 8 counties
• ⚘
  Sorghum almum Parodi Introduced SOAL

  Columbus grass · Poaceae 4 counties
• 
  Sorghum bicolor (L.) Moench Introduced SOBI2

  sorghum · Poaceae 46 counties
• 
  Sorghum bicolor (L.) Moench ssp. drummondii (Nees ex Steud.) de Wet & Harlan Introduced SOBID

  Sudangrass · Poaceae 1 county
• 
  Sorghum halepense (L.) Pers. Introduced SOHA

  Johnsongrass · Poaceae 69 counties
• 
  Spergula arvensis L. Introduced SPAR

  corn spurry · Caryophyllaceae 3 counties
• 
  Spergularia maritima (All.) Chiov. Introduced SPMA10

  media sandspurry · Caryophyllaceae 7 counties
• 
  Spergularia rubra (L.) J. Presl & C. Presl Introduced SPRU

  red sandspurry · Caryophyllaceae 2 counties
• 
  Spiraea japonica L. f. Introduced SPJA

  Japanese meadowsweet · Rosaceae 2 counties
• 
  Spiraea japonica L. f. var. fortunei (Planch.) Rehder Introduced SPJAF

  fortune meadowsweet · Rosaceae 2 counties
• 
  Spiraea prunifolia Siebold & Zucc. Introduced SPPR

  bridalwreath spirea · Rosaceae 2 counties
• 
  Stellaria graminea L. Introduced STGR

  grass-like starwort · Caryophyllaceae 27 counties
• 
  Stellaria media (L.) Vill. Introduced STME2

  common chickweed · Caryophyllaceae 102 counties
• 
  Stellaria media (L.) Vill. ssp. media Introduced STMEM

  common chickweed · Caryophyllaceae 2 counties
• 
  Symphytum officinale L. Introduced SYOF

  common comfrey · Boraginaceae 11 counties
• 
  Syringa vulgaris L. Introduced SYVU

  common lilac · Oleaceae 8 counties
• 
  Tamarix parviflora DC. Introduced TAPA4

  smallflower tamarisk · Tamaricaceae 3 counties
• 
  Tanacetum balsamita L. Introduced TABA

  costmary · Asteraceae 9 counties
• 
  Tanacetum parthenium (L.) Sch. Bip. Introduced TAPA6

  feverfew · Asteraceae 7 counties
• 
  Tanacetum vulgare L. Introduced TAVU

  common tansy · Asteraceae 50 counties
• 
  Taraxacum laevigatum (Willd.) DC. Introduced TALA2

  rock dandelion · Asteraceae 42 counties
• 
  Taraxacum officinale F.H. Wigg. ssp. officinale Introduced TAOFO

  common dandelion · Asteraceae 102 counties
• 
  Thlaspi alliaceum L. Introduced THAL2

  roadside pennycress · Brassicaceae 1 county