Iowa

• Adair 19001
  393 taxa Open ↗
• Adams 19003
  200 taxa Open ↗
• Allamakee 19005
  118 taxa Open ↗
• Appanoose 19007
  38 taxa Open ↗
• Audubon 19009
  225 taxa Open ↗
• Benton 19011
  21 taxa Open ↗
• Black Hawk 19013
  33 taxa Open ↗
• Boone 19015
  146 taxa Open ↗
• Bremer 19017
  24 taxa Open ↗
• Buchanan 19019
  16 taxa Open ↗

Showing 2,201–2,225 of 2,225.

• 
  Wolffia borealis (Engelm. ex Hegelm.) Landolt ex Landolt & Wildi Native WOBO

  northern watermeal · Lemnaceae 1 county
• 
  Wolffia brasiliensis Weddell Native WOBR

  Brazilian watermeal · Lemnaceae 2 counties
• 
  Wolffia columbiana Karst. Native WOCO

  Columbian watermeal · Lemnaceae 6 counties
• 
  Woodsia ilvensis (L.) R. Br. Native WOIL

  rusty woodsia · Dryopteridaceae 2 counties
• 
  Woodsia obtusa (Spreng.) Torr. Native WOOB2

  bluntlobe cliff fern · Dryopteridaceae 34 counties
• 
  Woodsia obtusa (Spreng.) Torr. ssp. obtusa Native WOOBO

  bluntlobe cliff fern · Dryopteridaceae 34 counties
• 
  Woodsia oregana D.C. Eaton Native WOOR

  Oregon cliff fern · Dryopteridaceae 1 county
• 
  Woodsia oregana D.C. Eaton ssp. cathcartiana (B.L. Rob.) Windham Native WOORC2

  Oregon cliff fern · Dryopteridaceae 1 county
• 
  Xanthium strumarium L. Native XAST

  rough cocklebur · Asteraceae 14 counties
• 
  Xanthium strumarium L. var. canadense (Mill.) Torr. & A. Gray Native XASTC

  Canada cocklebur · Asteraceae 1 county
• 
  Xanthium strumarium L. var. glabratum (DC.) Cronquist Native XASTG

  rough cocklebur · Asteraceae 1 county
• 
  Yucca filamentosa L. Native YUFI

  Adam's needle · Agavaceae 2 counties
• 
  Yucca glauca Nutt. Native YUGL

  soapweed yucca · Agavaceae 7 counties
• 
  Yucca glauca Nutt. var. glauca Native YUGLG2

  soapweed yucca · Agavaceae 7 counties
• 
  Zannichellia palustris L. Native ZAPA

  horned pondweed · Zannichelliaceae 3 counties
• 
  Zanthoxylum americanum Mill. Native ZAAM

  common pricklyash · Rutaceae 25 counties
• 
  Zea mays L. Introduced ZEMA

  corn · Poaceae 2 counties
• 
  Zea mays L. ssp. mays Introduced ZEMAM2

  corn · Poaceae 2 counties
• 
  Zigadenus elegans Pursh Native ZIEL2

  mountain deathcamas · Liliaceae 3 counties
• 
  Zigadenus elegans Pursh ssp. elegans Native ZIELE

  mountain deathcamas · Liliaceae 1 county
• 
  Zizania aquatica L. Native ZIAQ

  annual wildrice · Poaceae 11 counties
• 
  Zizania aquatica L. var. aquatica Native ZIAQA2

  annual wildrice · Poaceae 11 counties
• 
  Zizia aptera (A. Gray) Fernald Native ZIAP

  meadow zizia · Apiaceae 8 counties
• 
  Zizia aurea (L.) W.D.J. Koch Native ZIAU

  golden zizia · Apiaceae 44 counties
• ⚘
  ×Elyhordeum macounii (Vasey) Barkworth & D.R. Dewey [Elymus trachycaulus × Hordeum jubatum] Native ELMA8

  Macoun's barley · Poaceae 15 counties