Ohio

• Adams 39001
  1,331 taxa Open ↗
• Allen 39003
  1,038 taxa Open ↗
• Ashland 39005
  998 taxa Open ↗
• Ashtabula 39007
  1,437 taxa Open ↗
• Athens 39009
  1,149 taxa Open ↗
• Auglaize 39011
  958 taxa Open ↗
• Belmont 39013
  945 taxa Open ↗
• Brown 39015
  629 taxa Open ↗
• Butler 39017
  850 taxa Open ↗
• Carroll 39019
  933 taxa Open ↗

Showing 3,101–3,150 of 3,424.

• 
  Tamarix chinensis Lour. Introduced TACH2

  five-stamen tamarisk · Tamaricaceae 1 county
• 
  Tanacetum balsamita L. Introduced TABA

  costmary · Asteraceae 16 counties
• 
  Tanacetum parthenium (L.) Sch. Bip. Introduced TAPA6

  feverfew · Asteraceae 11 counties
• 
  Tanacetum vulgare L. Introduced TAVU

  common tansy · Asteraceae 44 counties
• 
  Taraxacum laevigatum (Willd.) DC. Introduced TALA2

  rock dandelion · Asteraceae 11 counties
• 
  Taraxacum officinale F.H. Wigg. Both TAOF

  common dandelion · Asteraceae 88 counties
• 
  Taraxacum officinale F.H. Wigg. ssp. officinale Introduced TAOFO

  common dandelion · Asteraceae 88 counties
• 
  Taxus canadensis Marshall Native TACA7

  Canada yew · Taxaceae 4 counties
• 
  Tephrosia virginiana (L.) Pers. Native TEVI

  Virginia tephrosia · Fabaceae 25 counties
• 
  Tetraneuris herbacea Greene Native TEHE4

  eastern fournerved daisy · Asteraceae 1 county
• 
  Teucrium canadense L. Native TECA3

  Canada germander · Lamiaceae 82 counties
• 
  Teucrium canadense L. var. canadense Native TECAC

  Canada germander · Lamiaceae 79 counties
• 
  Teucrium canadense L. var. occidentale (A. Gray) E.M. McClint. & Epling Native TECAO

  western germander · Lamiaceae 25 counties
• 
  Thalictrum dasycarpum Fisch. & Avé-Lall. Native THDA

  purple meadow-rue · Ranunculaceae 2 counties
• 
  Thalictrum dioicum L. Native THDI

  early meadow-rue · Ranunculaceae 5 counties
• 
  Thalictrum pubescens Pursh Native THPU2

  king of the meadow · Ranunculaceae 2 counties
• 
  Thalictrum revolutum DC. Native THRE

  waxyleaf meadow-rue · Ranunculaceae 3 counties
• 
  Thalictrum thalictroides (L.) Eames & B. Boivin Native THTH2

  rue anemone · Ranunculaceae 84 counties
• 
  Thaspium barbinode (Michx.) Nutt. Native THBA

  hairyjoint meadowparsnip · Apiaceae 57 counties
• 
  Thaspium trifoliatum (L.) A. Gray Native THTR

  purple meadowparsnip · Apiaceae 85 counties
• 
  Thaspium trifoliatum (L.) A. Gray var. aureum (L.) Britton Native THTRA

  purple meadowparsnip · Apiaceae 85 counties
• 
  Thaspium trifoliatum (L.) A. Gray var. trifoliatum Native THTRT

  purple meadowparsnip · Apiaceae 3 counties
• 
  Thelypteris noveboracensis (L.) Nieuwl. Native THNO

  New York fern · Thelypteridaceae 49 counties
• 
  Thelypteris palustris Schott Native THPA

  eastern marsh fern · Thelypteridaceae 62 counties
• 
  Thelypteris palustris Schott var. pubescens (G. Lawson) Fernald Native THPAP

  eastern marsh fern · Thelypteridaceae 62 counties
• 
  Thlaspi alliaceum L. Introduced THAL2

  roadside pennycress · Brassicaceae 1 county
• 
  Thlaspi arvense L. Introduced THAR5

  field pennycress · Brassicaceae 49 counties
• 
  Thuja occidentalis L. Native THOC2

  arborvitae · Cupressaceae 3 counties
• 
  Thymelaea passerina (L.) Coss. & Germ. Introduced THPA7

  mezereon · Thymelaeaceae 1 county
• 
  Thymus praecox Opiz Introduced THPR

  mother of thyme · Lamiaceae 10 counties
• 
  Thymus praecox Opiz ssp. arcticus (Durand) Jalas Introduced THPRA

  creeping thyme · Lamiaceae 10 counties
• 
  Tiarella cordifolia L. Native TICO

  heartleaf foamflower · Saxifragaceae 36 counties
• 
  Tiarella cordifolia L. var. cordifolia Native TICOC2

  heartleaf foamflower · Saxifragaceae 35 counties
• 
  Tilia americana L. Native TIAM

  American basswood · Tiliaceae 87 counties
• 
  Tilia americana L. var. americana Native TIAMA

  American basswood · Tiliaceae 86 counties
• 
  Tilia americana L. var. heterophylla (Vent.) Loudon Native TIAMH

  American basswood · Tiliaceae 21 counties
• 
  Tipularia discolor (Pursh) Nutt. Native TIDI

  crippled cranefly · Orchidaceae 19 counties
• 
  Torilis arvensis (Huds.) Link Introduced TOAR

  spreading hedgeparsley · Apiaceae 16 counties
• 
  Torilis arvensis (Huds.) Link ssp. arvensis Introduced TOARA

  spreading hedgeparsley · Apiaceae 16 counties
• 
  Torilis japonica (Houtt.) DC. Introduced TOJA

  erect hedgeparsley · Apiaceae 20 counties
• 
  Torreyochloa pallida (Torr.) Church Native TOPA6

  pale false mannagrass · Poaceae 9 counties
• 
  Torreyochloa pallida (Torr.) Church var. pallida Native TOPAP

  pale false mannagrass · Poaceae 9 counties
• 
  Toxicodendron radicans (L.) Kuntze Native TORA2

  eastern poison ivy · Anacardiaceae 88 counties
• 
  Toxicodendron radicans (L.) Kuntze ssp. negundo (Greene) Gillis Native TORAN

  eastern poison ivy · Anacardiaceae 88 counties
• 
  Toxicodendron radicans (L.) Kuntze ssp. radicans Native TORAR

  eastern poison ivy · Anacardiaceae 5 counties
• 
  Toxicodendron rydbergii (Small ex Rydb.) Greene Native TORY

  western poison ivy · Anacardiaceae 3 counties
• 
  Toxicodendron vernix (L.) Kuntze Native TOVE

  poison sumac · Anacardiaceae 31 counties
• 
  Tradescantia ohiensis Raf. Native TROH

  bluejacket · Commelinaceae 42 counties
• 
  Tradescantia subaspera Ker Gawl. Native TRSU2

  zigzag spiderwort · Commelinaceae 15 counties
• 
  Tradescantia subaspera Ker Gawl. var. subaspera Native TRSUS

  zigzag spiderwort · Commelinaceae 15 counties