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 2,451–2,500 of 3,901.

• 
  Panicum dichotomiflorum Michx. var. dichotomiflorum Native PADID

  fall panicgrass · Poaceae 60 counties
• 
  Panicum flexile (Gattinger) Scribn. Native PAFL2

  wiry panicgrass · Poaceae 14 counties
• 
  Panicum gattingeri Nash Native PAGA

  Gattinger's panicgrass · Poaceae 64 counties
• 
  Panicum miliaceum L. Introduced PAMI2

  proso millet · Poaceae 18 counties
• 
  Panicum miliaceum L. ssp. miliaceum Introduced PAMIM

  broomcorn millet · Poaceae 18 counties
• 
  Panicum philadelphicum Bernh. ex Trin. Native PAPH

  Philadelphia panicgrass · Poaceae 37 counties
• 
  Panicum rigidulum Bosc ex Nees Native PARI4

  redtop panicgrass · Poaceae 48 counties
• 
  Panicum rigidulum Bosc ex Nees var. elongatum (Pursh) Lelong Native PARIE2

  redtop panicgrass · Poaceae 24 counties
• 
  Panicum rigidulum Bosc ex Nees var. pubescens (Vasey) Lelong Native PARIP

  redtop panicgrass · Poaceae 8 counties
• 
  Panicum rigidulum Bosc ex Nees var. rigidulum Native PARIR

  redtop panicgrass · Poaceae 1 county
• 
  Panicum verrucosum Muhl. Native PAVE2

  warty panicgrass · Poaceae 10 counties
• 
  Panicum virgatum L. Native PAVI2

  switchgrass · Poaceae 48 counties
• 
  Panicum virgatum L. var. virgatum Native PAVIV

  switchgrass · Poaceae 1 county
• 
  Papaver argemone L. Introduced PAAR3

  long pricklyhead poppy · Papaveraceae 2 counties
• 
  Papaver dubium L. Introduced PADU

  blindeyes · Papaveraceae 13 counties
• 
  Papaver hybridum L. Introduced PAHY3

  round pricklyhead poppy · Papaveraceae 1 county
• 
  Papaver orientale L. Introduced PAOR5

  Oriental poppy · Papaveraceae 4 counties
• 
  Papaver rhoeas L. Introduced PARH2

  corn poppy · Papaveraceae 12 counties
• 
  Papaver somniferum L. Introduced PASO2

  opium poppy · Papaveraceae 13 counties
• 
  Parapholis incurva (L.) C.E. Hubbard Introduced PAIN

  curved sicklegrass · Poaceae 1 county
• 
  Parietaria judaica L. Introduced PAJU

  spreading pellitory · Urticaceae 1 county
• 
  Parietaria pensylvanica Muhl. ex Willd. Native PAPE5

  Pennsylvania pellitory · Urticaceae 37 counties
• 
  Parnassia glauca Raf. Native PAGL3

  fen grass of Parnassus · Saxifragaceae 9 counties
• 
  Paronychia canadensis (L.) Alph. Wood Native PACA11

  smooth forked nailwort · Caryophyllaceae 50 counties
• 
  Paronychia fastigiata (Raf.) Fernald Native PAFA3

  hairy forked nailwort · Caryophyllaceae 41 counties
• 
  Paronychia fastigiata (Raf.) Fernald var. fastigiata Native PAFAF

  hairy forked nailwort · Caryophyllaceae 39 counties
• 
  Paronychia fastigiata (Raf.) Fernald var. nuttallii (Small) Fernald Native PAFAN

  hairy forked nailwort · Caryophyllaceae 9 counties
• 
  Paronychia montana (Small) Pax & K. Hoffm. Native PAMO7

  mountain nailwort · Caryophyllaceae 11 counties
• 
  Parthenium hysterophorus L. Introduced PAHY

  Santa Maria feverfew · Asteraceae 2 counties
• 
  Parthenium integrifolium L. Native PAIN3

  wild quinine · Asteraceae 6 counties
• 
  Parthenium integrifolium L. var. integrifolium Native PAINI

  wild quinine · Asteraceae 5 counties
• 
  Parthenocissus quinquefolia (L.) Planch. Native PAQU2

  Virginia creeper · Vitaceae 63 counties
• 
  Parthenocissus tricuspidata (Siebold & Zucc.) Planch. Introduced PATR6

  Boston ivy · Vitaceae 10 counties
• 
  Paspalum distichum L. Native PADI6

  knotgrass · Poaceae 1 county
• 
  Paspalum floridanum Michx. Native PAFL4

  Florida paspalum · Poaceae 1 county
• 
  Paspalum laeve Michx. Native PALA10

  field paspalum · Poaceae 18 counties
• 
  Paspalum pubiflorum Rupr. ex Fourn. Native PAPU5

  hairyseed paspalum · Poaceae 1 county
• 
  Paspalum setaceum Michx. Native PASE5

  thin paspalum · Poaceae 22 counties
• 
  Passiflora lutea L. Native PALU2

  yellow passionflower · Passifloraceae 6 counties
• 
  Pastinaca sativa L. Introduced PASA2

  wild parsnip · Apiaceae 64 counties
• 
  Patis racemosa (Sm.) Romasch., P.M. Peterson & R. J. Soreng Native PARA2

  blackseed ricegrass · Poaceae 37 counties
• 
  Paulownia tomentosa (Thunb.) Siebold & Zucc. ex Steud. Introduced PATO2

  princesstree · Scrophulariaceae 13 counties
• 
  Paxistima canbyi A. Gray Native PACA

  Canby's mountain-lover · Celastraceae 1 county
• 
  Pedicularis canadensis L. Native PECA

  Canadian lousewort · Scrophulariaceae 60 counties
• 
  Pedicularis canadensis L. ssp. canadensis Native PECAC3

  Canadian lousewort · Scrophulariaceae 60 counties
• 
  Pedicularis lanceolata Michx. Native PELA2

  swamp lousewort · Scrophulariaceae 20 counties
• 
  Pellaea atropurpurea (L.) Link Native PEAT2

  purple cliffbrake · Pteridaceae 36 counties
• 
  Pellaea glabella Mett. ex Kuhn Native PEGL

  smooth cliffbrake · Pteridaceae 19 counties
• 
  Pellaea glabella Mett. ex Kuhn ssp. glabella Native PEGLG

  smooth cliffbrake · Pteridaceae 18 counties
• 
  Peltandra virginica (L.) Schott Native PEVI

  green arrow arum · Araceae 15 counties