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 2,701–2,750 of 2,969 (native).

• 
  Symphyotrichum novae-angliae (L.) G.L. Nesom Native SYNO2

  New England aster · Asteraceae 89 counties
• 
  Symphyotrichum oblongifolium (Nutt.) G.L. Nesom Native SYOB

  aromatic aster · Asteraceae 40 counties
• 
  Symphyotrichum ontarionis (Wiegand) G.L. Nesom Native SYON2

  bottomland aster · Asteraceae 69 counties
• 
  Symphyotrichum oolentangiense (Riddell) G.L. Nesom Native SYOO

  skyblue aster · Asteraceae 59 counties
• 
  Symphyotrichum oolentangiense (Riddell) G.L. Nesom var. oolentangiense Native SYOOO

  skyblue aster · Asteraceae 59 counties
• 
  Symphyotrichum parviceps (Burgess) G.L. Nesom Native SYPA10

  smallhead aster · Asteraceae 24 counties
• 
  Symphyotrichum patens (Aiton) G.L. Nesom Native SYPA11

  late purple aster · Asteraceae 25 counties
• 
  Symphyotrichum patens (Aiton) G.L. Nesom var. patens Native SYPAP2

  late purple aster · Asteraceae 24 counties
• 
  Symphyotrichum patens (Aiton) G.L. Nesom var. patentissimum (Lindl. ex DC.) G.L. Nesom Native SYPAP

  late purple aster · Asteraceae 2 counties
• 
  Symphyotrichum pilosum (Willd.) G.L. Nesom Native SYPI2

  hairy white oldfield aster · Asteraceae 102 counties
• 
  Symphyotrichum pilosum (Willd.) G.L. Nesom var. pilosum Native SYPIP3

  hairy white oldfield aster · Asteraceae 102 counties
• 
  Symphyotrichum pilosum (Willd.) G.L. Nesom var. pringlei (A. Gray) G.L. Nesom Native SYPIP2

  Pringle's aster · Asteraceae 1 county
• 
  Symphyotrichum praealtum (Poir.) G.L. Nesom Native SYPR5

  willowleaf aster · Asteraceae 78 counties
• 
  Symphyotrichum praealtum (Poir.) G.L. Nesom var. praealtum Native SYPRP

  willowleaf aster · Asteraceae 77 counties
• 
  Symphyotrichum prenanthoides (Muhl. ex Willd.) G.L. Nesom Native SYPR6

  crookedstem aster · Asteraceae 7 counties
• 
  Symphyotrichum puniceum (L.) Á. Löve & D. Löve Native SYPU

  purplestem aster · Asteraceae 40 counties
• 
  Symphyotrichum puniceum (L.) Á. Löve & D. Löve var. puniceum Native SYPUP

  purplestem aster · Asteraceae 40 counties
• 
  Symphyotrichum racemosum (Elliott) G.L. Nesom Native SYRA5

  smooth white oldfield aster · Asteraceae 1 county
• 
  Symphyotrichum sericeum (Vent.) G.L. Nesom Native SYSE2

  western silver aster · Asteraceae 37 counties
• 
  Symphyotrichum shortii (Lindl.) G.L. Nesom Native SYSH

  Short's aster · Asteraceae 71 counties
• 
  Symphyotrichum turbinellum (Lindl.) G.L. Nesom Native SYTU2

  smooth violet prairie aster · Asteraceae 41 counties
• 
  Symphyotrichum undulatum (L.) G.L. Nesom Native SYUN

  wavyleaf aster · Asteraceae 7 counties
• 
  Symphyotrichum urophyllum (Lindl.) G.L. Nesom Native SYUR

  white arrowleaf aster · Asteraceae 3 counties
• ⚘
  Symphyotrichum ×amethystinum (Nutt.) G.L. Nesom [ericoides × novae-angliae] Native SYAM3

  aster · Asteraceae 7 counties
• 
  Symplocarpus foetidus (L.) Salisb. ex W.P.C. Barton Native SYFO

  skunk cabbage · Araceae 26 counties
• 
  Synandra hispidula (Michx.) Britton Native SYHI

  Guyandotte beauty · Lamiaceae 2 counties
• 
  Taenidia integerrima (L.) Drude Native TAIN

  yellow pimpernel · Apiaceae 62 counties
• 
  Taxodium distichum (L.) Rich. Native TADI2

  bald cypress · Cupressaceae 17 counties
• 
  Taxus canadensis Marshall Native TACA7

  Canada yew · Taxaceae 8 counties
• 
  Tephrosia virginiana (L.) Pers. Native TEVI

  Virginia tephrosia · Fabaceae 59 counties
• 
  Tetraneuris herbacea Greene Native TEHE4

  eastern fournerved daisy · Asteraceae 2 counties
• 
  Teucrium canadense L. Native TECA3

  Canada germander · Lamiaceae 102 counties
• 
  Teucrium canadense L. var. canadense Native TECAC

  Canada germander · Lamiaceae 102 counties
• 
  Teucrium canadense L. var. occidentale (A. Gray) E.M. McClint. & Epling Native TECAO

  western germander · Lamiaceae 41 counties
• 
  Thalia dealbata Fraser ex Roscoe Native THDE

  powdery alligator-flag · Marantaceae 2 counties
• 
  Thalictrum dasycarpum Fisch. & Avé-Lall. Native THDA

  purple meadow-rue · Ranunculaceae 77 counties
• 
  Thalictrum dioicum L. Native THDI

  early meadow-rue · Ranunculaceae 54 counties
• 
  Thalictrum revolutum DC. Native THRE

  waxyleaf meadow-rue · Ranunculaceae 77 counties
• 
  Thalictrum thalictroides (L.) Eames & B. Boivin Native THTH2

  rue anemone · Ranunculaceae 68 counties
• 
  Thaspium barbinode (Michx.) Nutt. Native THBA

  hairyjoint meadowparsnip · Apiaceae 35 counties
• 
  Thaspium trifoliatum (L.) A. Gray Native THTR

  purple meadowparsnip · Apiaceae 67 counties
• 
  Thaspium trifoliatum (L.) A. Gray var. aureum (L.) Britton Native THTRA

  purple meadowparsnip · Apiaceae 2 counties
• 
  Thaspium trifoliatum (L.) A. Gray var. trifoliatum Native THTRT

  purple meadowparsnip · Apiaceae 1 county
• 
  Thelesperma megapotamicum (Spreng.) Kuntze Native THME

  Hopi tea greenthread · Asteraceae 1 county
• 
  Thelypteris noveboracensis (L.) Nieuwl. Native THNO

  New York fern · Thelypteridaceae 5 counties
• 
  Thelypteris palustris Schott Native THPA

  eastern marsh fern · Thelypteridaceae 44 counties
• 
  Thelypteris palustris Schott var. pubescens (G. Lawson) Fernald Native THPAP

  eastern marsh fern · Thelypteridaceae 44 counties
• 
  Thismia americana N.E. Pfeiffer Native THAM2

  banded Trinity · Burmanniaceae 1 county
• 
  Thuja occidentalis L. Native THOC2

  arborvitae · Cupressaceae 5 counties
• 
  Tidestromia lanuginosa (Nutt.) Standl. Native TILA2

  woolly tidestromia · Amaranthaceae 1 county