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 2,501–2,550 of 3,901.

• 
  Pennisetum alopecuroides (L.) Spreng. Introduced PEAL

  Chinese fountaingrass · Poaceae 2 counties
• 
  Pennisetum glaucum (L.) R. Br. Introduced PEGL2

  pearl millet · Poaceae 66 counties
• 
  Penstemon calycosus Small Native PECA7

  longsepal beardtongue · Scrophulariaceae 10 counties
• 
  Penstemon canescens (Britton) Britton Native PECA8

  eastern gray beardtongue · Scrophulariaceae 10 counties
• 
  Penstemon digitalis Nutt. ex Sims Native PEDI

  foxglove beardtongue · Scrophulariaceae 61 counties
• 
  Penstemon hirsutus (L.) Willd. Native PEHI

  hairy beardtongue · Scrophulariaceae 50 counties
• 
  Penstemon laevigatus Aiton Native PELA8

  eastern smooth beardtongue · Scrophulariaceae 18 counties
• 
  Penstemon pallidus Small Native PEPA7

  pale beardtongue · Scrophulariaceae 8 counties
• 
  Penstemon tubaeflorus Nutt. Native PETU

  white wand beardtongue · Scrophulariaceae 1 county
• 
  Penstemon tubaeflorus Nutt. var. achoreus Fernald Native PETUA

  white wand beardtongue · Scrophulariaceae 1 county
• 
  Penthorum sedoides L. Native PESE6

  ditch stonecrop · Crassulaceae 64 counties
• 
  Perilla frutescens (L.) Britton Introduced PEFR4

  beefsteakplant · Lamiaceae 20 counties
• 
  Perilla frutescens (L.) Britton var. frutescens Introduced PEFRF2

  beefsteakplant · Lamiaceae 1 county
• 
  Periploca graeca L. Introduced PEGR9

  silkvine · Asclepiadaceae 2 counties
• 
  Petasites hybridus (L.) G. Gaertn., B. Mey. & Scherb. Introduced PEHY

  pestilence wort · Asteraceae 7 counties
• 
  Petrorhagia prolifera (L.) P.W. Ball & Heywood Introduced PEPR4

  childing pink · Caryophyllaceae 3 counties
• 
  Petrorhagia saxifraga (L.) Link Introduced PESA9

  saxifrage pink · Caryophyllaceae 3 counties
• 
  Petroselinum crispum (Mill.) Nyman ex A.W. Hill Introduced PECR2

  parsley · Apiaceae 2 counties
• 
  Petunia axillaris (Lam.) Britton, Sterns & Poggenb. Introduced PEAX

  large white petunia · Solanaceae 1 county
• ⚘
  Petunia ×atkinsiana D. Don ex Loudon [axillaris × integrifolia] Introduced PEAT7

  petunia · Solanaceae 18 counties
• 
  Peucedanum ostruthium (L.) W.D.J. Koch Introduced PEOS2

  masterwort · Apiaceae 3 counties
• 
  Phacelia bipinnatifida Michx. Native PHBI2

  fernleaf phacelia · Hydrophyllaceae 1 county
• 
  Phacelia dubia (L.) Trel. Native PHDU

  smallflower phacelia · Hydrophyllaceae 12 counties
• 
  Phacelia dubia (L.) Trel. var. dubia Native PHDUD

  smallflower phacelia · Hydrophyllaceae 12 counties
• 
  Phacelia hirsuta Nutt. Native PHHI

  fuzzy phacelia · Hydrophyllaceae 2 counties
• 
  Phacelia purshii Buckley Native PHPU3

  Miami mist · Hydrophyllaceae 12 counties
• 
  Phalaris arundinacea L. Native PHAR3

  reed canarygrass · Poaceae 62 counties
• 
  Phalaris canariensis L. Introduced PHCA5

  annual canarygrass · Poaceae 16 counties
• 
  Phalaris paradoxa L. Introduced PHPA5

  hood canarygrass · Poaceae 2 counties
• 
  Phaseolus polystachios (L.) Britton, Sterns & Poggenb. Native PHPO2

  thicket bean · Fabaceae 17 counties
• 
  Phaseolus polystachios (L.) Britton, Sterns & Poggenb. var. polystachios Native PHPOP

  thicket bean · Fabaceae 16 counties
• 
  Phedimus aizoon (L.) 't Hart Introduced PHAI

  Orpin aizoon · Crassulaceae 3 counties
• 
  Phedimus spurius (M. Bieb.) 't Hart Introduced PHSP9

  Caucasian stonecrop · Crassulaceae 6 counties
• 
  Phegopteris connectilis (Michx.) Watt Native PHCO24

  long beechfern · Thelypteridaceae 44 counties
• 
  Phegopteris hexagonoptera (Michx.) Fée Native PHHE11

  broad beechfern · Thelypteridaceae 61 counties
• 
  Phellodendron japonicum Maxim. Introduced PHJA

  Japanese corktree · Rutaceae 1 county
• 
  Phemeranthus teretifolius (Pursh) Raf. Native PHTE18

  quill fameflower · Portulacaceae 2 counties
• 
  Philadelphus coronarius L. Introduced PHCO7

  sweet mock orange · Hydrangeaceae 18 counties
• 
  Philadelphus inodorus L. Native PHIN5

  scentless mock orange · Hydrangeaceae 8 counties
• 
  Philadelphus pubescens Loisel. Native PHPU4

  hoary mock orange · Hydrangeaceae 4 counties
• 
  Philadelphus pubescens Loisel. var. pubescens Native PHPUP

  hoary mock orange · Hydrangeaceae 4 counties
• 
  Phleum pratense L. Introduced PHPR3

  timothy · Poaceae 67 counties
• 
  Phleum subulatum (Savi) Asch. & Graebn. Introduced PHSU2

  Italian timothy · Poaceae 1 county
• 
  Phlox divaricata L. Native PHDI5

  wild blue phlox · Polemoniaceae 46 counties
• 
  Phlox divaricata L. ssp. divaricata Native PHDID3

  wild blue phlox · Polemoniaceae 45 counties
• 
  Phlox divaricata L. ssp. laphamii (Alph. Wood) Wherry Native PHDIL6

  Lapham's phlox · Polemoniaceae 11 counties
• 
  Phlox latifolia Michx. Native PHLA13

  wideflower phlox · Polemoniaceae 6 counties
• 
  Phlox maculata L. Native PHMA4

  wild sweetwilliam · Polemoniaceae 49 counties
• 
  Phlox maculata L. ssp. maculata Native PHMAM

  wild sweetwilliam · Polemoniaceae 47 counties
• 
  Phlox maculata L. ssp. pyramidalis (Sm.) Wherry Native PHMAP3

  wild sweetwilliam · Polemoniaceae 23 counties