Pennsylvania

• Adams 42001
  1,101 taxa Open ↗
• Allegheny 42003
  1,943 taxa Open ↗
• Armstrong 42005
  1,126 taxa Open ↗
• Beaver 42007
  1,402 taxa Open ↗
• Bedford 42009
  1,989 taxa Open ↗
• Berks 42011
  2,115 taxa Open ↗
• Blair 42013
  1,613 taxa Open ↗
• Bradford 42015
  1,111 taxa Open ↗
• Bucks 42017
  2,298 taxa Open ↗
• Butler 42019
  1,422 taxa Open ↗

Showing 1,001–1,050 of 1,109 (introduced).

• 
  Taraxacum officinale F.H. Wigg. ssp. officinale Introduced TAOFO

  common dandelion · Asteraceae 65 counties
• 
  Teesdalia nudicaulis (L.) W.T. Aiton Introduced TENU

  barestem teesdalia · Brassicaceae 1 county
• 
  Tetragonia tetragonioides (Pall.) Kuntze Introduced TETE3

  New Zealand spinach · Aizoaceae 6 counties
• 
  Teucrium botrys L. Introduced TEBO

  cutleaf germander · Lamiaceae 1 county
• 
  Thinopyrum pycnanthum (Godr.) Barkworth Introduced THPY4

  tick quackgrass · Poaceae 1 county
• 
  Thlaspi alliaceum L. Introduced THAL2

  roadside pennycress · Brassicaceae 2 counties
• 
  Thlaspi arvense L. Introduced THAR5

  field pennycress · Brassicaceae 40 counties
• 
  Thymus praecox Opiz Introduced THPR

  mother of thyme · Lamiaceae 1 county
• 
  Thymus praecox Opiz ssp. arcticus (Durand) Jalas Introduced THPRA

  creeping thyme · Lamiaceae 1 county
• 
  Thymus pulegioides L. Introduced THPU5

  lemon thyme · Lamiaceae 22 counties
• 
  Torilis arvensis (Huds.) Link Introduced TOAR

  spreading hedgeparsley · Apiaceae 1 county
• 
  Torilis arvensis (Huds.) Link ssp. arvensis Introduced TOARA

  spreading hedgeparsley · Apiaceae 1 county
• 
  Torilis japonica (Houtt.) DC. Introduced TOJA

  erect hedgeparsley · Apiaceae 7 counties
• 
  Torilis leptophylla (L.) Rchb. f. Introduced TOLE2

  bristlefruit hedgeparsley · Apiaceae 1 county
• 
  Torilis nodosa (L.) Gaertn. Introduced TONO

  knotted hedgeparsley · Apiaceae 1 county
• 
  Tragopogon dubius Scop. Introduced TRDU

  yellow salsify · Asteraceae 33 counties
• 
  Tragopogon porrifolius L. Introduced TRPO

  salsify · Asteraceae 20 counties
• 
  Tragopogon pratensis L. Introduced TRPR

  Jack-go-to-bed-at-noon · Asteraceae 34 counties
• 
  Tragus racemosus (L.) All. Introduced TRRA

  stalked bur grass · Poaceae 3 counties
• 
  Trapa natans L. Introduced TRNA

  water chestnut · Trapaceae 4 counties
• 
  Tribulus terrestris L. Introduced TRTE

  puncturevine · Zygophyllaceae 7 counties
• 
  Tricyrtis hirta (Thunb.) Hook. Introduced TRHI8

  toadlily · Liliaceae 1 county
• 
  Trifolium arvense L. Introduced TRAR4

  rabbitfoot clover · Fabaceae 37 counties
• 
  Trifolium aureum Pollich Introduced TRAU2

  golden clover · Fabaceae 67 counties
• 
  Trifolium campestre Schreb. Introduced TRCA5

  field clover · Fabaceae 37 counties
• 
  Trifolium dubium Sibth. Introduced TRDU2

  suckling clover · Fabaceae 17 counties
• 
  Trifolium fragiferum L. Introduced TRFR2

  strawberry clover · Fabaceae 1 county
• 
  Trifolium hybridum L. Introduced TRHY

  alsike clover · Fabaceae 65 counties
• 
  Trifolium incarnatum L. Introduced TRIN3

  crimson clover · Fabaceae 20 counties
• 
  Trifolium lappaceum L. Introduced TRLA18

  burdock clover · Fabaceae 1 county
• 
  Trifolium pratense L. Introduced TRPR2

  red clover · Fabaceae 66 counties
• 
  Trifolium repens L. Introduced TRRE3

  white clover · Fabaceae 66 counties
• 
  Trifolium resupinatum L. Introduced TRRE4

  reversed clover · Fabaceae 4 counties
• 
  Trifolium squamosum L. Introduced TRSQ

  sea clover · Fabaceae 2 counties
• 
  Trifolium striatum L. Introduced TRST5

  knotted clover · Fabaceae 1 county
• 
  Trigonella procumbens (Besser) Rchb. Introduced TRPR8

  trailing fenugreek · Fabaceae 2 counties
• 
  Tripleurospermum perforatum (Mérat) M. Lainz Introduced TRPE21

  scentless false mayweed · Asteraceae 5 counties
• 
  Tripolium pannonicum (Jacq.) Dobrocz. Introduced TRPA26

  sea aster · Asteraceae 1 county
• 
  Triticum aestivum L. Introduced TRAE

  common wheat · Poaceae 32 counties
• 
  Tropaeolum majus L. Introduced TRMA7

  nasturtium · Tropaeolaceae 3 counties
• 
  Tulipa sylvestris L. Introduced TUSY

  wild tulip · Liliaceae 6 counties
• 
  Turgenia latifolia (L.) Hoffm. Introduced TULA

  broadleaf false carrot · Apiaceae 1 county
• 
  Tussilago farfara L. Introduced TUFA

  coltsfoot · Asteraceae 60 counties
• 
  Ulex europaeus L. Introduced ULEU

  common gorse · Fabaceae 1 county
• 
  Ulmus pumila L. Introduced ULPU

  Siberian elm · Ulmaceae 10 counties
• 
  Urtica dioica L. ssp. dioica Introduced URDID

  stinging nettle · Urticaceae 29 counties
• 
  Urtica urens L. Introduced URUR

  dwarf nettle · Urticaceae 3 counties
• 
  Vaccaria hispanica (Mill.) Rauschert Introduced VAHI2

  cow soapwort · Caryophyllaceae 21 counties
• 
  Valeriana officinalis L. Introduced VAOF

  garden valerian · Valerianaceae 15 counties
• 
  Valerianella locusta (L.) Lat. Introduced VALO

  Lewiston cornsalad · Valerianaceae 29 counties