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 2,101–2,150 of 2,225.

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  Triosteum aurantiacum E.P. Bicknell var. aurantiacum Native TRAUA

  orangefruit horse-gentian · Caprifoliaceae 1 county
• 
  Triosteum aurantiacum E.P. Bicknell var. illinoense (Wiegand) Palmer & Steyerm. Native TRAUI

  Illinois horse-gentian · Caprifoliaceae 3 counties
• 
  Triosteum perfoliatum L. Native TRPE5

  feverwort · Caprifoliaceae 22 counties
• 
  Triphora trianthophora (Sw.) Rydb. Native TRTR3

  threebirds · Orchidaceae 4 counties
• 
  Triplasis purpurea (Walter) Chapm. Native TRPU4

  purple sandgrass · Poaceae 9 counties
• 
  Tripsacum dactyloides (L.) L. Native TRDA3

  eastern gamagrass · Poaceae 11 counties
• 
  Triticum aestivum L. Introduced TRAE

  common wheat · Poaceae 1 county
• 
  Typha angustifolia L. Both TYAN

  narrowleaf cattail · Typhaceae 14 counties
• 
  Typha latifolia L. Native TYLA

  broadleaf cattail · Typhaceae 16 counties
• 
  Ulmus americana L. Native ULAM

  American elm · Ulmaceae 15 counties
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  Ulmus pumila L. Introduced ULPU

  Siberian elm · Ulmaceae 4 counties
• 
  Ulmus rubra Muhl. Native ULRU

  slippery elm · Ulmaceae 24 counties
• 
  Ulmus thomasii Sarg. Native ULTH

  rock elm · Ulmaceae 7 counties
• 
  Urtica dioica L. Both URDI

  stinging nettle · Urticaceae 15 counties
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  Urtica dioica L. ssp. gracilis (Aiton) Seland. Native URDIG

  California nettle · Urticaceae 14 counties
• 
  Utricularia macrorhiza Leconte Native UTMA

  common bladderwort · Lentibulariaceae 12 counties
• 
  Utricularia minor L. Native UTMI

  lesser bladderwort · Lentibulariaceae 1 county
• 
  Uvularia grandiflora Sm. Native UVGR

  largeflower bellwort · Liliaceae 10 counties
• 
  Uvularia sessilifolia L. Native UVSE

  sessileleaf bellwort · Liliaceae 1 county
• 
  Vaccaria hispanica (Mill.) Rauschert Introduced VAHI2

  cow soapwort · Caryophyllaceae 7 counties
• 
  Valeriana edulis Nutt. ex Torr. & A. Gray Native VAED

  tobacco root · Valerianaceae 1 county
• 
  Valeriana edulis Nutt. ex Torr. & A. Gray var. ciliata (Torr. & A. Gray) Cronquist Native VAEDC

  tobacco root · Valerianaceae 1 county
• 
  Vallisneria americana Michx. Native VAAM3

  American eelgrass · Hydrocharitaceae 5 counties
• 
  Veratrum virginicum (L.) W.T. Aiton Native VEVI5

  Virginia bunchflower · Liliaceae 7 counties
• 
  Veratrum woodii J.W. Robbins ex Alph. Wood Native VEWO3

  Wood's bunchflower · Liliaceae 1 county
• 
  Verbascum blattaria L. Introduced VEBL

  moth mullein · Scrophulariaceae 10 counties
• 
  Verbascum thapsus L. Introduced VETH

  common mullein · Scrophulariaceae 23 counties
• 
  Verbena bracteata Cav. ex Lag. & Rodr. Native VEBR

  bigbract verbena · Verbenaceae 36 counties
• 
  Verbena hastata L. Native VEHA2

  swamp verbena · Verbenaceae 38 counties
• 
  Verbena hastata L. var. hastata Native VEHAH

  swamp verbena · Verbenaceae 3 counties
• 
  Verbena simplex Lehm. Native VESI

  narrowleaf vervain · Verbenaceae 2 counties
• 
  Verbena stricta Vent. Native VEST

  hoary verbena · Verbenaceae 38 counties
• 
  Verbena urticifolia L. Native VEUR

  white vervain · Verbenaceae 30 counties
• 
  Verbena urticifolia L. var. urticifolia Native VEURU

  white vervain · Verbenaceae 2 counties
• ⚘
  Verbena ×illicita Moldenke [stricta × urticifolia] Native VEIL

  vervain · Verbenaceae 1 county
• ⚘
  Verbena ×moechina Moldenke [simplex × stricta] Native VEMO

  vervain · Verbenaceae 1 county
• 
  Verbesina alternifolia (L.) Britton ex Kearney Native VEAL

  wingstem · Asteraceae 13 counties
• 
  Verbesina helianthoides Michx. Native VEHE

  gravelweed · Asteraceae 1 county
• 
  Verbesina virginica L. Native VEVI3

  white crownbeard · Asteraceae 2 counties
• 
  Verbesina virginica L. var. virginica Native VEVIV

  white crownbeard · Asteraceae 2 counties
• 
  Vernonia baldwinii Torr. Native VEBA

  Baldwin's ironweed · Asteraceae 15 counties
• 
  Vernonia baldwinii Torr. ssp. interior (Small) Faust Native VEBAI2

  interior ironweed · Asteraceae 15 counties
• 
  Vernonia fasciculata Michx. Native VEFA2

  prairie ironweed · Asteraceae 25 counties
• 
  Vernonia fasciculata Michx. ssp. corymbosa (Schwein. ex Keating) S.B. Jones Native VEFAC

  prairie ironweed · Asteraceae 6 counties
• 
  Vernonia fasciculata Michx. ssp. fasciculata Native VEFAF

  prairie ironweed · Asteraceae 19 counties
• 
  Vernonia gigantea (Walter) Trel. Native VEGI

  giant ironweed · Asteraceae 1 county
• 
  Vernonia gigantea (Walter) Trel. ssp. gigantea Native VEGIG

  giant ironweed · Asteraceae 1 county
• 
  Vernonia missurica Raf. Native VEMI2

  Missouri ironweed · Asteraceae 3 counties
• 
  Veronica americana Schwein. ex Benth. Native VEAM2

  American speedwell · Scrophulariaceae 1 county
• 
  Veronica anagallis-aquatica L. Native VEAN2

  water speedwell · Scrophulariaceae 2 counties