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 1,401–1,450 of 2,969 (native).

• 
  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
• 
  Hydrophyllum virginianum L. var. virginianum Native HYVIV

  eastern waterleaf · Hydrophyllaceae 72 counties
• 
  Hylotelephium telephioides (Michx.) H. Ohba Native HYTE9

  Allegheny stonecrop · Crassulaceae 6 counties
• 
  Hymenocallis occidentalis (Leconte) Kunth Native HYOC2

  northern spiderlily · Liliaceae 11 counties
• 
  Hymenocallis occidentalis (Leconte) Kunth var. occidentalis Native HYOCO

  northern spiderlily · Liliaceae 11 counties
• 
  Hymenopappus scabiosaeus L'Hér. Native HYSC

  Carolina woollywhite · Asteraceae 6 counties
• 
  Hymenopappus scabiosaeus L'Hér. var. scabiosaeus Native HYSCS

  Carolina woollywhite · Asteraceae 6 counties
• 
  Hypericum adpressum W.P.C. Barton Native HYAD

  creeping St. Johnswort · Clusiaceae 7 counties
• 
  Hypericum ascyron L. Native HYAS80

  great St. Johnswort · Clusiaceae 26 counties
• 
  Hypericum boreale (Britton) E.P. Bicknell Native HYBO2

  northern St. Johnswort · Clusiaceae 2 counties
• 
  Hypericum canadense L. Native HYCA7

  lesser Canadian St. Johnswort · Clusiaceae 19 counties
• 
  Hypericum drummondii (Grev. & Hook.) Torr. & A. Gray Native HYDR

  nits and lice · Clusiaceae 32 counties
• 
  Hypericum ellipticum Hook. Native HYEL

  pale St. Johnswort · Clusiaceae 2 counties
• 
  Hypericum frondosum Michx. Native HYFR

  cedarglade St. Johnswort · Clusiaceae 1 county
• 
  Hypericum gentianoides (L.) Britton, Sterns & Poggenb. Native HYGE

  orangegrass · Clusiaceae 45 counties
• 
  Hypericum gymnanthum Engelm. & A. Gray Native HYGY

  claspingleaf St. Johnswort · Clusiaceae 14 counties
• 
  Hypericum hypericoides (L.) Crantz Native HYHY

  St. Andrew's cross · Clusiaceae 14 counties
• 
  Hypericum hypericoides (L.) Crantz ssp. hypericoides Native HYHYH

  St. Andrew's cross · Clusiaceae 1 county
• 
  Hypericum hypericoides (L.) Crantz ssp. multicaule (Michx. ex Willd.) N. Robson Native HYHYM

  St. Andrew's cross · Clusiaceae 13 counties
• 
  Hypericum kalmianum L. Native HYKA

  Kalm's St. Johnswort · Clusiaceae 2 counties
• 
  Hypericum lobocarpum Gattinger ex J.M. Coult. Native HYLO2

  fivelobe St. Johnswort · Clusiaceae 4 counties
• 
  Hypericum majus (A. Gray) Britton Native HYMA2

  large St. Johnswort · Clusiaceae 23 counties
• 
  Hypericum mutilum L. Native HYMU

  dwarf St. Johnswort · Clusiaceae 67 counties
• 
  Hypericum prolificum L. Native HYPR

  shrubby St. Johnswort · Clusiaceae 45 counties
• 
  Hypericum pseudomaculatum Bush Native HYPS

  false spotted St. Johnswort · Clusiaceae 5 counties
• 
  Hypericum punctatum Lam. Native HYPU

  spotted St. Johnswort · Clusiaceae 102 counties
• 
  Hypericum sphaerocarpum Michx. Native HYSP2

  roundseed St. Johnswort · Clusiaceae 95 counties
• 
  Hypericum virgatum Lam. Native HYVI6

  sharpleaf St. Johnswort · Clusiaceae 4 counties
• 
  Hypoxis hirsuta (L.) Coville Native HYHI2

  common goldstar · Liliaceae 80 counties
• 
  Ilex decidua Walter Native ILDE

  possumhaw · Aquifoliaceae 41 counties
• 
  Ilex mucronata (L.) Powell, Savolainen & Andrews Native ILMU

  catberry · Aquifoliaceae 2 counties
• 
  Ilex opaca Aiton Native ILOP

  American holly · Aquifoliaceae 1 county
• 
  Ilex opaca Aiton var. opaca Native ILOPO

  American holly · Aquifoliaceae 1 county
• 
  Ilex verticillata (L.) A. Gray Native ILVE

  common winterberry · Aquifoliaceae 19 counties
• 
  Iliamna rivularis (Douglas ex Hook.) Greene Native ILRI

  streambank wild hollyhock · Malvaceae 1 county
• 
  Iliamna rivularis (Douglas ex Hook.) Greene var. rivularis Native ILRIR

  streambank wild hollyhock · Malvaceae 1 county
• 
  Impatiens capensis Meerb. Native IMCA

  jewelweed · Balsaminaceae 92 counties
• 
  Impatiens pallida Nutt. Native IMPA

  pale touch-me-not · Balsaminaceae 75 counties
• 
  Iodanthus pinnatifidus (Michx.) Steud. Native IOPI

  purplerocket · Brassicaceae 54 counties
• 
  Ionactis linariifolius (L.) Greene Native IOLI2

  flaxleaf whitetop aster · Asteraceae 24 counties
• 
  Ipomoea lacunosa L. Native IPLA

  whitestar · Convolvulaceae 64 counties
• 
  Ipomoea pandurata (L.) G. Mey. Native IPPA

  man of the earth · Convolvulaceae 81 counties
• 
  Ipomopsis rubra (L.) Wherry Native IPRU2

  standing-cypress · Polemoniaceae 4 counties
• 
  Iresine rhizomatosa Standl. Native IRRH

  Juda's bush · Amaranthaceae 5 counties
• 
  Iris brevicaulis Raf. Native IRBR2

  zigzag iris · Iridaceae 19 counties
• 
  Iris cristata Aiton Native IRCR

  dwarf crested iris · Iridaceae 7 counties
• 
  Iris fulva Ker Gawl. Native IRFU

  copper iris · Iridaceae 8 counties
• 
  Iris virginica L. Native IRVI

  Virginia iris · Iridaceae 85 counties