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 3,751–3,775 of 3,775.

• 
  Woodwardia areolata (L.) T. Moore Native WOAR

  netted chainfern · Blechnaceae 6 counties
• 
  Woodwardia virginica (L.) Sm. Native WOVI

  Virginia chainfern · Blechnaceae 1 county
• 
  Xanthium spinosum L. Introduced XASP2

  spiny cocklebur · Asteraceae 2 counties
• 
  Xanthium strumarium L. Native XAST

  rough cocklebur · Asteraceae 90 counties
• 
  Xanthium strumarium L. var. canadense (Mill.) Torr. & A. Gray Native XASTC

  Canada cocklebur · Asteraceae 80 counties
• 
  Xanthium strumarium L. var. glabratum (DC.) Cronquist Native XASTG

  rough cocklebur · Asteraceae 60 counties
• 
  Xyris jupicai Rich. Native XYJU

  Richard's yelloweyed grass · Xyridaceae 1 county
• 
  Xyris torta Sm. Native XYTO

  slender yelloweyed grass · Xyridaceae 10 counties
• 
  Yucca filamentosa L. Native YUFI

  Adam's needle · Agavaceae 27 counties
• 
  Zannichellia palustris L. Native ZAPA

  horned pondweed · Zannichelliaceae 28 counties
• 
  Zanthoxylum americanum Mill. Native ZAAM

  common pricklyash · Rutaceae 71 counties
• 
  Zea mays L. Introduced ZEMA

  corn · Poaceae 19 counties
• 
  Zea mays L. ssp. mays Introduced ZEMAM2

  corn · Poaceae 19 counties
• 
  Zigadenus elegans Pursh Native ZIEL2

  mountain deathcamas · Liliaceae 3 counties
• 
  Zigadenus elegans Pursh ssp. glaucus (Nutt.) Hultén Native ZIELG

  mountain deathcamas · Liliaceae 3 counties
• 
  Zizania aquatica L. Native ZIAQ

  annual wildrice · Poaceae 16 counties
• 
  Zizania aquatica L. var. aquatica Native ZIAQA2

  annual wildrice · Poaceae 16 counties
• 
  Zizania palustris L. Native ZIPA3

  northern wildrice · Poaceae 3 counties
• 
  Zizania palustris L. var. interior (Fassett) Dore Native ZIPAI

  northern wildrice · Poaceae 3 counties
• 
  Zizaniopsis miliacea (Michx.) Döll & Asch. Native ZIMI

  giant cutgrass · Poaceae 1 county
• 
  Zizia aptera (A. Gray) Fernald Native ZIAP

  meadow zizia · Apiaceae 17 counties
• 
  Zizia aurea (L.) W.D.J. Koch Native ZIAU

  golden zizia · Apiaceae 82 counties
• 
  Zoysia japonica Steud. Introduced ZOJA

  Korean lawngrass · Poaceae 1 county
• ⚘
  ×Elyhordeum macounii (Vasey) Barkworth & D.R. Dewey [Elymus trachycaulus × Hordeum jubatum] Native ELMA8

  Macoun's barley · Poaceae 1 county
• ⚘
  ×Elyhordeum montanense (Scribn.) Bowden [Elymus virginicus × Hordeum jubatum] Native ELMO4

  mountain barley · Poaceae 3 counties