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 1,701–1,750 of 3,775.

• 
  Hieracium caespitosum Dumort. Introduced HICA10

  meadow hawkweed · Asteraceae 8 counties
• 
  Hieracium gronovii L. Native HIGR3

  queendevil · Asteraceae 48 counties
• ⚘
  Hieracium kalmii L. Native HIKA2

  Kalm's hawkweed · Asteraceae 16 counties
• ⚘
  Hieracium kalmii L. var. kalmii Native HIKAK2

  Kalm's hawkweed · Asteraceae 15 counties
• 
  Hieracium longipilum Torr. Native HILO2

  hairy hawkweed · Asteraceae 60 counties
• 
  Hieracium murorum L. Introduced HIMU

  wall hawkweed · Asteraceae 1 county
• 
  Hieracium scabrum Michx. Native HISC

  rough hawkweed · Asteraceae 54 counties
• 
  Hieracium scabrum Michx. var. scabrum Native HISCS

  rough hawkweed · Asteraceae 2 counties
• 
  Hieracium umbellatum L. Native HIUM

  narrowleaf hawkweed · Asteraceae 1 county
• 
  Hierochloe hirta (Schrank) Borbás Native HIHI

  northern sweetgrass · Poaceae 14 counties
• 
  Hierochloe hirta (Schrank) Borbás ssp. arctica (J. Presl) G. Weim. Native HIHIA

  northern sweetgrass · Poaceae 14 counties
• 
  Hippuris vulgaris L. Native HIVU2

  common mare's-tail · Hippuridaceae 3 counties
• 
  Holcus lanatus L. Introduced HOLA

  common velvetgrass · Poaceae 13 counties
• 
  Holosteum umbellatum L. Introduced HOUM

  jagged chickweed · Caryophyllaceae 49 counties
• 
  Hordeum brachyantherum Nevski Native HOBR2

  meadow barley · Poaceae 3 counties
• 
  Hordeum brachyantherum Nevski ssp. brachyantherum Native HOBRB2

  meadow barley · Poaceae 3 counties
• 
  Hordeum jubatum L. Native HOJU

  foxtail barley · Poaceae 83 counties
• 
  Hordeum jubatum L. ssp. jubatum Native HOJUJ

  foxtail barley · Poaceae 2 counties
• 
  Hordeum marinum Huds. Introduced HOMA2

  seaside barley · Poaceae 1 county
• 
  Hordeum marinum Huds. ssp. gussoneanum (Parl.) Thell. Introduced HOMAG

  Mediterranean barley · Poaceae 1 county
• 
  Hordeum pusillum Nutt. Native HOPU

  little barley · Poaceae 87 counties
• 
  Hordeum vulgare L. Introduced HOVU

  common barley · Poaceae 21 counties
• 
  Hosta lancifolia (Thunb.) Engl. Introduced HOLA3

  narrowleaf plantain lily · Liliaceae 2 counties
• 
  Hottonia inflata Elliott Native HOIN

  American featherfoil · Primulaceae 7 counties
• 
  Houstonia caerulea L. Native HOCA4

  azure bluet · Rubiaceae 15 counties
• 
  Houstonia canadensis Willd. ex Roem. & Schult. Native HOCA5

  Canadian summer bluet · Rubiaceae 12 counties
• 
  Houstonia longifolia Gaertn. Native HOLO

  longleaf summer bluet · Rubiaceae 34 counties
• 
  Houstonia purpurea L. Native HOPU2

  Venus' pride · Rubiaceae 54 counties
• 
  Houstonia purpurea L. var. calycosa A. Gray Native HOPUC

  Venus' pride · Rubiaceae 53 counties
• 
  Houstonia purpurea L. var. purpurea Native HOPUP3

  Venus' pride · Rubiaceae 3 counties
• 
  Houstonia pusilla Schoepf Native HOPU3

  tiny bluet · Rubiaceae 38 counties
• 
  Hudsonia tomentosa Nutt. Native HUTO

  woolly beachheather · Cistaceae 6 counties
• 
  Hudsonia tomentosa Nutt. var. intermedia Peck Native HUTOI

  sand goldenheather · Cistaceae 2 counties
• 
  Hudsonia tomentosa Nutt. var. tomentosa Native HUTOT

  woolly beachheather · Cistaceae 4 counties
• 
  Humulus japonicus Siebold & Zucc. Introduced HUJA

  Japanese hop · Cannabaceae 28 counties
• 
  Humulus lupulus L. Both HULU

  common hop · Cannabaceae 81 counties
• 
  Humulus lupulus L. var. lupuloides E. Small Native HULUL

  common hop · Cannabaceae 2 counties
• 
  Huperzia lucidula (Michx.) Trevis. Native HULU2

  shining clubmoss · Lycopodiaceae 18 counties
• 
  Huperzia porophila (Lloyd & Underw.) Holub Native HUPO2

  rock clubmoss · Lycopodiaceae 6 counties
• 
  Hybanthus concolor (T.F. Forst.) Spreng. Native HYCO6

  eastern greenviolet · Violaceae 37 counties
• 
  Hydrangea arborescens L. Native HYAR

  wild hydrangea · Hydrangeaceae 57 counties
• 
  Hydrangea cinerea Small Native HYCI3

  ashy hydrangea · Hydrangeaceae 2 counties
• 
  Hydrastis canadensis L. Native HYCA

  goldenseal · Ranunculaceae 64 counties
• 
  Hydrocotyle ranunculoides L. f. Native HYRA

  floating marshpennywort · Apiaceae 1 county
• 
  Hydrocotyle umbellata L. Native HYUM

  manyflower marshpennywort · Apiaceae 1 county
• 
  Hydrolea uniflora Raf. Native HYUN

  oneflower false fiddleleaf · Hydrophyllaceae 6 counties
• 
  Hydrophyllum appendiculatum Michx. Native HYAP

  great waterleaf · Hydrophyllaceae 67 counties
• 
  Hydrophyllum canadense L. Native HYCA3

  bluntleaf waterleaf · Hydrophyllaceae 24 counties
• 
  Hydrophyllum macrophyllum Nutt. Native HYMA

  largeleaf waterleaf · Hydrophyllaceae 10 counties
• 
  Hydrophyllum virginianum L. Native HYVI

  eastern waterleaf · Hydrophyllaceae 72 counties