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 1,301–1,350 of 2,969 (native).

• 
  Helenium amarum (Raf.) H. Rock var. amarum Native HEAMA

  sneezeweed · Asteraceae 33 counties
• 
  Helenium autumnale L. Native HEAU

  common sneezeweed · Asteraceae 82 counties
• 
  Helenium autumnale L. var. autumnale Native HEAUA

  common sneezeweed · Asteraceae 82 counties
• 
  Helenium flexuosum Raf. Native HEFL

  purplehead sneezeweed · Asteraceae 48 counties
• 
  Helianthemum bicknellii Fernald Native HEBI2

  hoary frostweed · Cistaceae 46 counties
• 
  Helianthemum canadense (L.) Michx. Native HECA3

  longbranch frostweed · Cistaceae 28 counties
• 
  Helianthus angustifolius L. Native HEAN2

  swamp sunflower · Asteraceae 4 counties
• 
  Helianthus annuus L. Native HEAN3

  common sunflower · Asteraceae 74 counties
• 
  Helianthus ciliaris DC. Native HECI

  Texas blueweed · Asteraceae 1 county
• 
  Helianthus decapetalus L. Native HEDE

  thinleaf sunflower · Asteraceae 49 counties
• 
  Helianthus divaricatus L. Native HEDI2

  woodland sunflower · Asteraceae 84 counties
• 
  Helianthus giganteus L. Native HEGI

  giant sunflower · Asteraceae 7 counties
• 
  Helianthus grosseserratus M. Martens Native HEGR4

  sawtooth sunflower · Asteraceae 94 counties
• 
  Helianthus hirsutus Raf. Native HEHI2

  hairy sunflower · Asteraceae 66 counties
• 
  Helianthus maximiliani Schrad. Native HEMA2

  Maximilian sunflower · Asteraceae 16 counties
• 
  Helianthus microcephalus Torr. & A. Gray Native HEMI3

  small woodland sunflower · Asteraceae 18 counties
• 
  Helianthus mollis Lam. Native HEMO2

  ashy sunflower · Asteraceae 70 counties
• 
  Helianthus occidentalis Riddell Native HEOC2

  fewleaf sunflower · Asteraceae 47 counties
• 
  Helianthus occidentalis Riddell ssp. occidentalis Native HEOCO

  fewleaf sunflower · Asteraceae 47 counties
• 
  Helianthus pauciflorus Nutt. Native HEPA19

  stiff sunflower · Asteraceae 77 counties
• 
  Helianthus pauciflorus Nutt. ssp. pauciflorus Native HEPAP2

  stiff sunflower · Asteraceae 77 counties
• 
  Helianthus petiolaris Nutt. Native HEPE

  prairie sunflower · Asteraceae 46 counties
• 
  Helianthus petiolaris Nutt. ssp. petiolaris Native HEPEP

  prairie sunflower · Asteraceae 46 counties
• 
  Helianthus salicifolius A. Dietr. Native HESA2

  willowleaf sunflower · Asteraceae 1 county
• 
  Helianthus silphioides Nutt. Native HESI

  rosinweed sunflower · Asteraceae 3 counties
• 
  Helianthus strumosus L. Native HEST

  paleleaf woodland sunflower · Asteraceae 92 counties
• 
  Helianthus tuberosus L. Native HETU

  Jerusalem artichoke · Asteraceae 96 counties
• 
  Helianthus ×doronicoides Lam. (pro sp.) [giganteus × mollis] Native HEDO

  sunflower · Asteraceae 1 county
• ⚘
  Helianthus ×luxurians E.E. Watson (pro sp.) [giganteus × grosseserratus] Native HELU4

  sunflower · Asteraceae 4 counties
• 
  Heliopsis helianthoides (L.) Sweet Native HEHE5

  smooth oxeye · Asteraceae 97 counties
• 
  Heliopsis helianthoides (L.) Sweet var. occidentalis (T.R. Fisher) Steyerm. Native HEHEO

  smooth oxeye · Asteraceae 1 county
• 
  Heliopsis helianthoides (L.) Sweet var. scabra (Dunal) Fernald Native HEHES

  smooth oxeye · Asteraceae 1 county
• 
  Heliotropium curassavicum L. Native HECU3

  salt heliotrope · Boraginaceae 2 counties
• 
  Heliotropium curassavicum L. var. curassavicum Native HECUC2

  salt heliotrope · Boraginaceae 2 counties
• 
  Heliotropium tenellum (Nutt.) Torr. Native HETE3

  pasture heliotrope · Boraginaceae 3 counties
• 
  Hepatica nobilis Schreb. Native HENO2

  hepatica · Ranunculaceae 73 counties
• 
  Hepatica nobilis Schreb. var. acuta (Pursh) Steyerm. Native HENOA

  sharplobe hepatica · Ranunculaceae 73 counties
• 
  Hepatica nobilis Schreb. var. obtusa (Pursh) Steyerm. Native HENOO

  roundlobe hepatica · Ranunculaceae 6 counties
• 
  Heracleum maximum W. Bartram Native HEMA80

  common cowparsnip · Apiaceae 55 counties
• 
  Hesperostipa comata (Trin. & Rupr.) Barkworth Native HECO26

  needle and thread · Poaceae 3 counties
• 
  Hesperostipa comata (Trin. & Rupr.) Barkworth ssp. comata Native HECOC8

  needle and thread · Poaceae 3 counties
• 
  Hesperostipa spartea (Trin.) Barkworth Native HESP11

  porcupinegrass · Poaceae 56 counties
• 
  Heteranthera dubia (Jacq.) MacMill. Native HEDU2

  grassleaf mudplantain · Pontederiaceae 37 counties
• 
  Heteranthera limosa (Sw.) Willd. Native HELI2

  blue mudplantain · Pontederiaceae 7 counties
• 
  Heteranthera reniformis Ruiz & Pav. Native HERE

  kidneyleaf mudplantain · Pontederiaceae 6 counties
• 
  Heteranthera rotundifolia (Kunth) Griseb. Native HERO5

  roundleaf mudplantain · Pontederiaceae 1 county
• 
  Heterotheca camporum (Greene) Shinners Native HECA16

  lemonyellow false goldenaster · Asteraceae 44 counties
• 
  Heterotheca camporum (Greene) Shinners var. camporum Native HECAC2

  lemonyellow false goldenaster · Asteraceae 44 counties
• 
  Heterotheca subaxillaris (Lam.) Britton & Rusby Native HESU3

  camphorweed · Asteraceae 14 counties
• 
  Heterotheca villosa (Pursh) Shinners Native HEVI4

  hairy false goldenaster · Asteraceae 44 counties