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 2,301–2,350 of 3,775.

• 
  Nekemias arborea (L.) J. Wen & Boggan Native NEAR5

  peppervine · Vitaceae 8 counties
• 
  Nelumbo lutea Willd. Native NELU

  American lotus · Nelumbonaceae 59 counties
• 
  Neobeckia aquatica (Eaton) Greene Native NEAQ2

  lakecress · Brassicaceae 42 counties
• 
  Nepeta cataria L. Introduced NECA2

  catnip · Lamiaceae 77 counties
• 
  Neslia paniculata (L.) Desv. Introduced NEPA3

  ballmustard · Brassicaceae 2 counties
• 
  Nicandra physalodes (L.) Scop. Introduced NIPH

  apple of Peru · Solanaceae 18 counties
• 
  Nicotiana longiflora Cav. Introduced NILO

  longflower tobacco · Solanaceae 1 county
• 
  Nicotiana rustica L. Introduced NIRU

  Aztec tobacco · Solanaceae 3 counties
• 
  Nigella damascena L. Introduced NIDA

  devil in the bush · Ranunculaceae 2 counties
• 
  Nothocalais cuspidata (Pursh) Greene Native NOCU

  prairie false dandelion · Asteraceae 14 counties
• 
  Nothoscordum bivalve (L.) Britton Native NOBI2

  crowpoison · Liliaceae 39 counties
• 
  Nuphar lutea (L.) Sm. Native NULU

  yellow pond-lily · Nymphaeaceae 51 counties
• 
  Nuphar lutea (L.) Sm. ssp. advena (Aiton) Kartesz & Gandhi Native NULUA

  yellow pond-lily · Nymphaeaceae 51 counties
• 
  Nuphar lutea (L.) Sm. ssp. variegata (Durand) E.O. Beal Native NULUV

  varigated yellow pond-lily · Nymphaeaceae 4 counties
• 
  Nuttallanthus canadensis (L.) D.A. Sutton Native NUCA

  Canada toadflax · Scrophulariaceae 27 counties
• 
  Nuttallanthus texanus (Scheele) D.A. Sutton Native NUTE

  Texas toadflax · Scrophulariaceae 5 counties
• ⚘
  Nymphaea odorata Aiton Native NYOD

  American white waterlily · Nymphaeaceae 36 counties
• ⚘
  Nymphaea odorata Aiton ssp. tuberosa (Paine) Wiersma & Hellquist Native NYODT

  American white waterlily · Nymphaeaceae 35 counties
• 
  Nymphoides peltata (S.G. Gmel.) Kuntze Introduced NYPE

  yellow floatingheart · Menyanthaceae 2 counties
• 
  Nyssa aquatica L. Native NYAQ2

  water tupelo · Cornaceae 10 counties
• 
  Nyssa biflora Walter Native NYBI

  swamp tupelo · Cornaceae 1 county
• 
  Nyssa sylvatica Marshall Native NYSY

  blackgum · Cornaceae 37 counties
• 
  Obolaria virginica L. Native OBVI

  Virginia pennywort · Gentianaceae 11 counties
• 
  Ocimum basilicum L. Introduced OCBA

  sweet basil · Lamiaceae 1 county
• 
  Oenothera biennis L. Native OEBI

  common evening primrose · Onagraceae 102 counties
• 
  Oenothera clelandii W. Dietr., P.H. Raven & W.L. Wagner Native OECL3

  Cleland's evening primrose · Onagraceae 1 county
• 
  Oenothera curtiflora W.L. Wagner & Hoch Native OECU2

  velvetweed · Onagraceae 37 counties
• 
  Oenothera filiformis (Small) W.L. Wagner & Hoch Native OEFI2

  longflower beeblossom · Onagraceae 27 counties
• 
  Oenothera filipes (Spach) W.L. Wagner & Hoch Native OEFI3

  slenderstalk beeblossom · Onagraceae 1 county
• 
  Oenothera fruticosa L. Native OEFR

  narrowleaf evening primrose · Onagraceae 8 counties
• 
  Oenothera fruticosa L. ssp. fruticosa Native OEFRF

  narrowleaf evening primrose · Onagraceae 6 counties
• 
  Oenothera fruticosa L. ssp. tetragona (Roth) W.L. Wagner Native OEFRT

  narrowleaf evening primrose · Onagraceae 5 counties
• 
  Oenothera gaura W.L. Wagner & Hoch Native OEGA

  biennial beeblossom · Onagraceae 93 counties
• 
  Oenothera laciniata Hill Native OELA

  cutleaf evening primrose · Onagraceae 68 counties
• 
  Oenothera linifolia Nutt. Native OELI

  threadleaf evening primrose · Onagraceae 10 counties
• 
  Oenothera macrocarpa Nutt. Native OEMA

  bigfruit evening primrose · Onagraceae 1 county
• 
  Oenothera macrocarpa Nutt. ssp. macrocarpa Native OEMAM

  bigfruit evening primrose · Onagraceae 1 county
• 
  Oenothera nutans Atk. & Bartlett Native OENU2

  nodding evening primrose · Onagraceae 2 counties
• 
  Oenothera nuttallii Sweet Native OENU

  Nuttall's evening primrose · Onagraceae 3 counties
• 
  Oenothera parviflora L. Native OEPA5

  northern evening primrose · Onagraceae 4 counties
• 
  Oenothera perennis L. Native OEPE

  little evening primrose · Onagraceae 4 counties
• 
  Oenothera pilosella Raf. Native OEPI2

  meadow evening primrose · Onagraceae 61 counties
• 
  Oenothera pilosella Raf. ssp. pilosella Native OEPIP

  meadow evening primrose · Onagraceae 61 counties
• 
  Oenothera rhombipetala Nutt. ex Torr. & A. Gray Native OERH

  fourpoint evening primrose · Onagraceae 38 counties
• 
  Oenothera speciosa Nutt. Native OESP2

  pinkladies · Onagraceae 37 counties
• 
  Oenothera triloba Nutt. Native OETR2

  stemless evening primrose · Onagraceae 1 county
• 
  Oenothera villosa Thunb. Native OEVI

  hairy evening primrose · Onagraceae 20 counties
• 
  Oenothera villosa Thunb. ssp. villosa Native OEVIV

  hairy evening primrose · Onagraceae 20 counties
• 
  Oligoneuron album (Nutt.) G.L. Nesom Native OLAL2

  prairie goldenrod · Asteraceae 19 counties
• 
  Oligoneuron ohioense (Frank ex Riddell) G.N. Jones Native OLOH

  Ohio goldenrod · Asteraceae 10 counties