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 3,651–3,700 of 3,901.

• 
  Trillium cernuum L. Native TRCE

  whip-poor-will flower · Liliaceae 25 counties
• 
  Trillium erectum L. Native TRER3

  red trillium · Liliaceae 56 counties
• 
  Trillium flexipes Raf. Native TRFL6

  nodding wakerobin · Liliaceae 11 counties
• 
  Trillium grandiflorum (Michx.) Salisb. Native TRGR4

  white trillium · Liliaceae 35 counties
• 
  Trillium nivale Riddell Native TRNI2

  snow trillium · Liliaceae 7 counties
• 
  Trillium recurvatum Beck Native TRRE5

  bloody butcher · Liliaceae 1 county
• 
  Trillium sessile L. Native TRSE2

  toadshade · Liliaceae 14 counties
• 
  Trillium undulatum Willd. Native TRUN

  painted trillium · Liliaceae 45 counties
• 
  Triodanis biflora (Ruiz & Pav.) Greene Native TRBI2

  small Venus' looking-glass · Campanulaceae 2 counties
• 
  Triodanis perfoliata (L.) Nieuwl. Native TRPE4

  clasping Venus' looking-glass · Campanulaceae 55 counties
• 
  Triosteum angustifolium L. Native TRAN3

  yellowfruit horse-gentian · Caprifoliaceae 8 counties
• 
  Triosteum aurantiacum E.P. Bicknell Native TRAU4

  orangefruit horse-gentian · Caprifoliaceae 41 counties
• 
  Triosteum aurantiacum E.P. Bicknell var. aurantiacum Native TRAUA

  orangefruit horse-gentian · Caprifoliaceae 35 counties
• 
  Triosteum aurantiacum E.P. Bicknell var. glaucescens Wiegand Native TRAUG

  orangefruit horse-gentian · Caprifoliaceae 13 counties
• 
  Triosteum aurantiacum E.P. Bicknell var. illinoense (Wiegand) Palmer & Steyerm. Native TRAUI

  Illinois horse-gentian · Caprifoliaceae 11 counties
• 
  Triosteum perfoliatum L. Native TRPE5

  feverwort · Caprifoliaceae 33 counties
• 
  Triphora trianthophora (Sw.) Rydb. Native TRTR3

  threebirds · Orchidaceae 42 counties
• 
  Triplasis purpurea (Walter) Chapm. Native TRPU4

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

  eastern gamagrass · Poaceae 8 counties
• 
  Trisetum spicatum (L.) K. Richt. Native TRSP2

  spike trisetum · Poaceae 2 counties
• 
  Triticum aestivum L. Introduced TRAE

  common wheat · Poaceae 32 counties
• 
  Trollius laxus Salisb. Native TRLA14

  American globeflower · Ranunculaceae 8 counties
• 
  Trollius laxus Salisb. ssp. laxus Native TRLAL

  American globeflower · Ranunculaceae 8 counties
• 
  Tropaeolum majus L. Introduced TRMA7

  nasturtium · Tropaeolaceae 3 counties
• 
  Tsuga canadensis (L.) Carrière Native TSCA

  eastern hemlock · Pinaceae 67 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
• 
  Typha angustifolia L. Both TYAN

  narrowleaf cattail · Typhaceae 33 counties
• 
  Typha latifolia L. Native TYLA

  broadleaf cattail · Typhaceae 61 counties
• ⚘
  Typha ×glauca Godr. (pro sp.) [angustifolia or domingensis × latifolia] Native TYGL

  hybrid cattail · Typhaceae 8 counties
• 
  Ulex europaeus L. Introduced ULEU

  common gorse · Fabaceae 1 county
• 
  Ulmus americana L. Native ULAM

  American elm · Ulmaceae 63 counties
• 
  Ulmus pumila L. Introduced ULPU

  Siberian elm · Ulmaceae 10 counties
• 
  Ulmus rubra Muhl. Native ULRU

  slippery elm · Ulmaceae 64 counties
• 
  Urochloa adspersa (Trin.) R. Webster Native URAD

  Dominican signalgrass · Poaceae 1 county
• 
  Urtica dioica L. Both URDI

  stinging nettle · Urticaceae 55 counties
• 
  Urtica dioica L. ssp. dioica Introduced URDID

  stinging nettle · Urticaceae 29 counties
• 
  Urtica dioica L. ssp. gracilis (Aiton) Seland. Native URDIG

  California nettle · Urticaceae 51 counties
• 
  Urtica urens L. Introduced URUR

  dwarf nettle · Urticaceae 3 counties
• 
  Utricularia cornuta Michx. Native UTCO

  horned bladderwort · Lentibulariaceae 11 counties
• 
  Utricularia geminiscapa Benj. Native UTGE

  hiddenfruit bladderwort · Lentibulariaceae 14 counties
• 
  Utricularia gibba L. Native UTGI

  humped bladderwort · Lentibulariaceae 15 counties
• 
  Utricularia intermedia Hayne Native UTIN2

  flatleaf bladderwort · Lentibulariaceae 10 counties
• 
  Utricularia macrorhiza Leconte Native UTMA

  common bladderwort · Lentibulariaceae 34 counties
• 
  Utricularia minor L. Native UTMI

  lesser bladderwort · Lentibulariaceae 6 counties
• 
  Utricularia purpurea Walter Native UTPU

  eastern purple bladderwort · Lentibulariaceae 7 counties
• 
  Utricularia radiata Small Native UTRA

  little floating bladderwort · Lentibulariaceae 1 county