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 3,601–3,650 of 3,901.

• 
  Torilis leptophylla (L.) Rchb. f. Introduced TOLE2

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

  knotted hedgeparsley · Apiaceae 1 county
• 
  Torreyochloa pallida (Torr.) Church Native TOPA6

  pale false mannagrass · Poaceae 32 counties
• 
  Torreyochloa pallida (Torr.) Church var. fernaldii (Hitchc.) Dore ex Koyama & Kawano Native TOPAF

  Fernald's false mannagrass · Poaceae 15 counties
• 
  Torreyochloa pallida (Torr.) Church var. pallida Native TOPAP

  pale false mannagrass · Poaceae 26 counties
• 
  Toxicodendron radicans (L.) Kuntze Native TORA2

  eastern poison ivy · Anacardiaceae 58 counties
• 
  Toxicodendron radicans (L.) Kuntze ssp. radicans Native TORAR

  eastern poison ivy · Anacardiaceae 1 county
• 
  Toxicodendron rydbergii (Small ex Rydb.) Greene Native TORY

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

  poison sumac · Anacardiaceae 36 counties
• 
  Tradescantia ohiensis Raf. Native TROH

  bluejacket · Commelinaceae 13 counties
• 
  Tradescantia virginiana L. Native TRVI

  Virginia spiderwort · Commelinaceae 27 counties
• 
  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
• 
  Trautvetteria caroliniensis (Walter) Vail Native TRCA

  Carolina bugbane · Ranunculaceae 3 counties
• 
  Trautvetteria caroliniensis (Walter) Vail var. caroliniensis Native TRCAC2

  Carolina bugbane · Ranunculaceae 3 counties
• 
  Triadenum fraseri (Spach) Gleason Native TRFR

  Fraser's marsh St. Johnswort · Clusiaceae 41 counties
• 
  Triadenum virginicum (L.) Raf. Native TRVI2

  Virginia marsh St. Johnswort · Clusiaceae 44 counties
• 
  Tribulus terrestris L. Introduced TRTE

  puncturevine · Zygophyllaceae 7 counties
• 
  Trichomanes intricatum Farrar Native TRIN13

  weft fern · Hymenophyllaceae 37 counties
• 
  Trichophorum planifolium (Spreng.) Palla Native TRPL6

  bashful bulrush · Cyperaceae 35 counties
• 
  Trichostema brachiatum L. Native TRBR5

  fluxweed · Lamiaceae 22 counties
• 
  Trichostema dichotomum L. Native TRDI2

  forked bluecurls · Lamiaceae 42 counties
• 
  Trichostema setaceum Houtt. Native TRSE5

  narrowleaf bluecurls · Lamiaceae 4 counties
• 
  Tricyrtis hirta (Thunb.) Hook. Introduced TRHI8

  toadlily · Liliaceae 1 county
• 
  Tridens flavus (L.) Hitchc. Native TRFL2

  purpletop tridens · Poaceae 49 counties
• 
  Tridens flavus (L.) Hitchc. var. flavus Native TRFLF

  purpletop tridens · Poaceae 49 counties
• 
  Tridens strictus (Nutt.) Nash Native TRST2

  longspike tridens · Poaceae 1 county
• 
  Trientalis borealis Raf. Native TRBO2

  starflower · Primulaceae 57 counties
• 
  Trientalis borealis Raf. ssp. borealis Native TRBOB

  starflower · Primulaceae 57 counties
• 
  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 carolinianum Michx. Native TRCA6

  Carolina clover · Fabaceae 1 county
• 
  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 reflexum L. Native TRRE2

  buffalo clover · Fabaceae 5 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
• 
  Trifolium virginicum Small ex Small & Vail Native TRVI3

  Kates Mountain clover · Fabaceae 4 counties
• 
  Triglochin palustris L. Native TRPA28

  marsh arrowgrass · Juncaginaceae 1 county
• 
  Trigonella procumbens (Besser) Rchb. Introduced TRPR8

  trailing fenugreek · Fabaceae 2 counties