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 1–50 of 3,775.

• 
  Abelmoschus esculentus (L.) Moench Introduced ABES

  okra · Malvaceae 1 county
• 
  Abutilon theophrasti Medik. Introduced ABTH

  velvetleaf · Malvaceae 88 counties
• 
  Acalypha deamii (Weath.) H.E. Ahles Native ACDE4

  Deam's threeseed mercury · Euphorbiaceae 5 counties
• 
  Acalypha gracilens A. Gray Native ACGR2

  slender threeseed mercury · Euphorbiaceae 65 counties
• 
  Acalypha monococca (Engelm. ex A. Gray) Lill. W. Mill. & Gandhi Native ACMO4

  slender threeseed mercury · Euphorbiaceae 7 counties
• 
  Acalypha ostryifolia Riddell Native ACOS

  pineland threeseed mercury · Euphorbiaceae 36 counties
• 
  Acalypha rhomboidea Raf. Native ACRH

  common threeseed mercury · Euphorbiaceae 102 counties
• 
  Acalypha virginica L. Native ACVI

  Virginia threeseed mercury · Euphorbiaceae 102 counties
• 
  Acer floridanum (Chapm.) Pax Native ACFL

  southern sugar maple · Aceraceae 4 counties
• 
  Acer ginnala Maxim. Introduced ACGI

  Amur maple · Aceraceae 4 counties
• 
  Acer negundo L. Native ACNE2

  boxelder · Aceraceae 102 counties
• 
  Acer negundo L. var. negundo Native ACNEN

  boxelder · Aceraceae 3 counties
• 
  Acer nigrum Michx. f. Native ACNI5

  black maple · Aceraceae 41 counties
• 
  Acer platanoides L. Introduced ACPL

  Norway maple · Aceraceae 9 counties
• 
  Acer pseudoplatanus L. Introduced ACPS

  sycamore maple · Aceraceae 1 county
• 
  Acer rubrum L. Native ACRU

  red maple · Aceraceae 42 counties
• 
  Acer rubrum L. var. drummondii (Hook. & Arn. ex Nutt.) Sarg. Native ACRUD

  Drummond's maple · Aceraceae 14 counties
• 
  Acer rubrum L. var. rubrum Native ACRUR

  red maple · Aceraceae 40 counties
• 
  Acer rubrum L. var. trilobum Torr. & A. Gray ex K. Koch Native ACRUT

  red maple · Aceraceae 4 counties
• 
  Acer saccharinum L. Native ACSA2

  silver maple · Aceraceae 102 counties
• 
  Acer saccharum Marshall Native ACSA3

  sugar maple · Aceraceae 95 counties
• 
  Acer saccharum Marshall var. saccharum Native ACSAS

  sugar maple · Aceraceae 95 counties
• 
  Acer saccharum Marshall var. schneckii Rehder Native ACSAS2

  sugar maple · Aceraceae 11 counties
• 
  Achillea millefolium L. Both ACMI2

  common yarrow · Asteraceae 102 counties
• 
  Achillea millefolium L. var. millefolium Introduced ACMIM2

  common yarrow · Asteraceae 102 counties
• 
  Achillea millefolium L. var. occidentalis DC. Native ACMIO

  western yarrow · Asteraceae 13 counties
• 
  Aconitum uncinatum L. Native ACUN

  southern blue monkshood · Ranunculaceae 1 county
• 
  Aconitum uncinatum L. ssp. uncinatum Native ACUNU

  southern blue monkshood · Ranunculaceae 1 county
• 
  Acorus americanus (Raf.) Raf. Native ACAM

  sweetflag · Acoraceae 65 counties
• 
  Acorus calamus L. Introduced ACCA4

  calamus · Acoraceae 63 counties
• 
  Acroptilon repens (L.) DC. Introduced ACRE3

  hardheads · Asteraceae 3 counties
• 
  Actaea pachypoda Elliott Native ACPA

  white baneberry · Ranunculaceae 78 counties
• 
  Actaea podocarpa DC. Native ACPO11

  mountain bugbane · Ranunculaceae 1 county
• 
  Actaea racemosa L. Native ACRA7

  black baneberry · Ranunculaceae 8 counties
• 
  Actaea racemosa L. var. racemosa Native ACRAR

  black bugbane · Ranunculaceae 8 counties
• 
  Actaea rubifolia (Kearney) Kartesz Native ACRU14

  Appalachian bugbane · Ranunculaceae 7 counties
• 
  Actaea rubra (Aiton) Willd. Native ACRU2

  red baneberry · Ranunculaceae 18 counties
• 
  Actaea rubra (Aiton) Willd. ssp. rubra Native ACRUR2

  red baneberry · Ranunculaceae 18 counties
• 
  Adiantum pedatum L. Native ADPE

  northern maidenhair · Pteridaceae 102 counties
• 
  Adlumia fungosa (Aiton) Greene ex Britton, Sterns & Poggenb. Native ADFU

  allegheny vine · Fumariaceae 2 counties
• 
  Adoxa moschatellina L. Native ADMO

  muskroot · Adoxaceae 1 county
• 
  Aegilops cylindrica Host Introduced AECY

  jointed goatgrass · Poaceae 24 counties
• 
  Aegopodium podagraria L. Introduced AEPO

  bishop's goutweed · Apiaceae 3 counties
• 
  Aesculus flava Aiton Native AEFL

  yellow buckeye · Hippocastanaceae 1 county
• 
  Aesculus glabra Willd. Native AEGL

  Ohio buckeye · Hippocastanaceae 65 counties
• 
  Aesculus glabra Willd. var. arguta (Buckley) B.L. Rob. Native AEGLA

  Ohio buckeye · Hippocastanaceae 1 county
• 
  Aesculus glabra Willd. var. glabra Native AEGLG

  Ohio buckeye · Hippocastanaceae 65 counties
• 
  Aesculus hippocastanum L. Introduced AEHI

  horse chestnut · Hippocastanaceae 8 counties
• 
  Aesculus pavia L. Native AEPA

  red buckeye · Hippocastanaceae 9 counties
• 
  Aesculus pavia L. var. pavia Native AEPAP

  red buckeye · Hippocastanaceae 9 counties