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 1,651–1,700 of 3,775.

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  Helianthus petiolaris Nutt. ssp. petiolaris Native HEPEP

  prairie sunflower · Asteraceae 46 counties
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  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 europaeum L. Introduced HEEU

  European heliotrope · Boraginaceae 1 county
• 
  Heliotropium indicum L. Introduced HEIN

  Indian heliotrope · Boraginaceae 38 counties
• 
  Heliotropium tenellum (Nutt.) Torr. Native HETE3

  pasture heliotrope · Boraginaceae 3 counties
• 
  Helleborus viridis L. Introduced HEVI

  green hellebore · Ranunculaceae 3 counties
• 
  Hemerocallis fulva (L.) L. Introduced HEFU

  orange daylily · Liliaceae 75 counties
• 
  Hemerocallis lilioasphodelus L. Introduced HELI4

  yellow daylily · Liliaceae 4 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
• 
  Hesperis matronalis L. Introduced HEMA3

  dames rocket · Brassicaceae 41 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
• 
  Heterotheca villosa (Pursh) Shinners var. villosa Native HEVIV

  hairy false goldenaster · Asteraceae 1 county
• 
  Heuchera americana L. Native HEAM6

  American alumroot · Saxifragaceae 55 counties
• 
  Heuchera americana L. var. americana Native HEAMA2

  American alumroot · Saxifragaceae 3 counties
• 
  Heuchera americana L. var. hirsuticaulis (Wheelock) Rosend., Butters & Lakela Native HEAMH

  American alumroot · Saxifragaceae 55 counties
• 
  Heuchera parviflora Bartlett Native HEPA10

  littleflower alumroot · Saxifragaceae 11 counties
• 
  Heuchera parviflora Bartlett var. parviflora Native HEPAP4

  littleflower alumroot · Saxifragaceae 11 counties
• 
  Heuchera parviflora Bartlett var. puberula (Mack. & Bush) E.F. Wells Native HEPAP5

  littleflower alumroot · Saxifragaceae 11 counties
• 
  Heuchera richardsonii R. Br. Native HERI

  Richardson's alumroot · Saxifragaceae 66 counties
• 
  Hexalectris spicata (Walter) Barnhart Native HESP3

  spiked crested coralroot · Orchidaceae 5 counties
• 
  Hexalectris spicata (Walter) Barnhart var. spicata Native HESPS3

  spiked crested coralroot · Orchidaceae 5 counties
• 
  Hibiscus laevis All. Native HILA2

  halberdleaf rosemallow · Malvaceae 74 counties
• ⚘
  Hibiscus lasiocarpos Cav. Native HILA6

  rosemallow · Malvaceae 1 county
• 
  Hibiscus moscheutos L. Native HIMO

  crimsoneyed rosemallow · Malvaceae 40 counties
• 
  Hibiscus syriacus L. Introduced HISY

  rose of Sharon · Malvaceae 2 counties
• 
  Hibiscus trionum L. Introduced HITR

  flower of an hour · Malvaceae 71 counties
• 
  Hieracium aurantiacum L. Introduced HIAU

  orange hawkweed · Asteraceae 5 counties