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 2,851–2,900 of 3,901.

• 
  Pseudognaphalium obtusifolium (L.) Hilliard & B.L. Burtt Native PSOB3

  rabbit-tobacco · Asteraceae 67 counties
• 
  Pseudognaphalium obtusifolium (L.) Hilliard & B.L. Burtt ssp. obtusifolium Native PSOBO

  rabbit-tobacco · Asteraceae 67 counties
• ⚘
  Pseudolysimachion longifolium (L.) Opiz Introduced PSLO6

  longleaf speedwell · Scrophulariaceae 16 counties
• 
  Pseudosasa japonica (Siebold & Zucc. ex Steud.) Makino ex Nakai Introduced PSJA

  arrow bamboo · Poaceae 4 counties
• 
  Pseudotsuga menziesii (Mirb.) Franco Native PSME

  Douglas-fir · Pinaceae 1 county
• 
  Ptelea trifoliata L. Native PTTR

  common hoptree · Rutaceae 13 counties
• 
  Ptelea trifoliata L. ssp. trifoliata Native PTTRT

  common hoptree · Rutaceae 13 counties
• 
  Ptelea trifoliata L. ssp. trifoliata var. trifoliata Native PTTRT2

  common hoptree · Rutaceae 13 counties
• 
  Pteridium aquilinum (L.) Kuhn Native PTAQ

  western brackenfern · Dennstaedtiaceae 67 counties
• 
  Pteridium aquilinum (L.) Kuhn var. latiusculum (Desv.) Underw. ex A. Heller Native PTAQL

  western brackenfern · Dennstaedtiaceae 67 counties
• 
  Pteridium aquilinum (L.) Kuhn var. pseudocaudatum (Clute) A. Heller Native PTAQP

  western brackenfern · Dennstaedtiaceae 1 county
• 
  Ptilimnium capillaceum (Michx.) Raf. Native PTCA

  herbwilliam · Apiaceae 2 counties
• 
  Ptilimnium nodosum (Rose) Mathias Native PTNO

  piedmont mock bishopweed · Apiaceae 1 county
• 
  Puccinellia distans (Jacq.) Parl. Both PUDI

  weeping alkaligrass · Poaceae 12 counties
• 
  Puccinellia distans (Jacq.) Parl. ssp. distans Introduced PUDID

  weeping alkaligrass · Poaceae 12 counties
• 
  Puccinellia fasciculata (Torr.) E.P. Bicknell Native PUFA

  saltmarsh alkaligrass · Poaceae 1 county
• 
  Puccinellia maritima (Huds.) Parl. Both PUMA

  seaside alkaligrass · Poaceae 1 county
• 
  Puccinellia rupestris (With.) Fernald & Weath. Introduced PURU

  British alkaligrass · Poaceae 1 county
• 
  Pueraria montana (Lour.) Merr. Introduced PUMO

  kudzu · Fabaceae 18 counties
• 
  Pueraria montana (Lour.) Merr. var. lobata (Willd.) Maesen & S.M. Almeida ex Sanjappa & Predeep Introduced PUMOL

  kudzu · Fabaceae 11 counties
• 
  Pycnanthemum clinopodioides Torr. & A. Gray Native PYCL

  basil mountainmint · Lamiaceae 14 counties
• 
  Pycnanthemum incanum (L.) Michx. Native PYIN

  hoary mountainmint · Lamiaceae 50 counties
• 
  Pycnanthemum incanum (L.) Michx. var. incanum Native PYINI

  hoary mountainmint · Lamiaceae 50 counties
• 
  Pycnanthemum muticum (Michx.) Pers. Native PYMU

  clustered mountainmint · Lamiaceae 24 counties
• 
  Pycnanthemum tenuifolium Schrad. Native PYTE

  narrowleaf mountainmint · Lamiaceae 50 counties
• ⚘
  Pycnanthemum torrei Benth. Native PYTO

  Torrey's mountainmint · Lamiaceae 10 counties
• 
  Pycnanthemum verticillatum (Michx.) Pers. Native PYVE

  whorled mountainmint · Lamiaceae 41 counties
• 
  Pycnanthemum verticillatum (Michx.) Pers. var. pilosum (Nutt.) Cooperr. Native PYVEP

  whorled mountainmint · Lamiaceae 3 counties
• 
  Pycnanthemum verticillatum (Michx.) Pers. var. verticillatum Native PYVEV

  whorled mountainmint · Lamiaceae 41 counties
• 
  Pycnanthemum virginianum (L.) T. Dur. & B.D. Jacks. ex B.L. Rob. & Fernald Native PYVI

  Virginia mountainmint · Lamiaceae 46 counties
• 
  Pyracantha coccinea M. Roem. Introduced PYCO2

  scarlet firethorn · Rosaceae 2 counties
• 
  Pyrola americana Sweet Native PYAM

  American wintergreen · Pyrolaceae 59 counties
• 
  Pyrola chlorantha Sw. Native PYCH

  greenflowered wintergreen · Pyrolaceae 31 counties
• 
  Pyrola elliptica Nutt. Native PYEL

  waxflower shinleaf · Pyrolaceae 60 counties
• 
  Pyrrhopappus carolinianus (Walter) DC. Native PYCA2

  Carolina desert-chicory · Asteraceae 1 county
• 
  Pyrularia pubera Michx. Native PYPU

  buffalo nut · Santalaceae 3 counties
• 
  Pyrus calleryana Decne. Introduced PYCA80

  Callery pear · Rosaceae 2 counties
• 
  Pyrus communis L. Introduced PYCO

  common pear · Rosaceae 29 counties
• 
  Quercus acutissima Carruthers Introduced QUAC80

  sawtooth oak · Fagaceae 1 county
• ⚘
  Quercus alba L. Native QUAL

  white oak · Fagaceae 67 counties
• ⚘
  Quercus bicolor Willd. Native QUBI

  swamp white oak · Fagaceae 43 counties
• 
  Quercus coccinea Münchh. Native QUCO2

  scarlet oak · Fagaceae 55 counties
• 
  Quercus coccinea Münchh. var. coccinea Native QUCOC

  scarlet oak · Fagaceae 55 counties
• 
  Quercus falcata Michx. Native QUFA

  southern red oak · Fagaceae 5 counties
• 
  Quercus ilicifolia Wangenh. Native QUIL

  bear oak · Fagaceae 50 counties
• 
  Quercus imbricaria Michx. Native QUIM

  shingle oak · Fagaceae 28 counties
• 
  Quercus macrocarpa Michx. Native QUMA2

  bur oak · Fagaceae 20 counties
• 
  Quercus macrocarpa Michx. var. macrocarpa Native QUMAM

  bur oak · Fagaceae 20 counties
• 
  Quercus marilandica Münchh. Native QUMA3

  blackjack oak · Fagaceae 9 counties
• 
  Quercus marilandica Münchh. var. marilandica Native QUMAM2

  blackjack oak · Fagaceae 9 counties