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 2,601–2,650 of 3,901.

• 
  Pinus nigra Arnold Introduced PINI

  Austrian pine · Pinaceae 12 counties
• 
  Pinus pungens Lamb. Native PIPU5

  Table Mountain pine · Pinaceae 23 counties
• 
  Pinus resinosa Aiton Native PIRE

  red pine · Pinaceae 26 counties
• 
  Pinus rigida Mill. Native PIRI

  pitch pine · Pinaceae 61 counties
• 
  Pinus strobus L. Native PIST

  eastern white pine · Pinaceae 66 counties
• 
  Pinus sylvestris L. Introduced PISY

  Scots pine · Pinaceae 24 counties
• 
  Pinus virginiana Mill. Native PIVI2

  Virginia pine · Pinaceae 52 counties
• 
  Piptatheropsis pungens (Torr.) Romasch., P.M. Peterson & R.J. Soreng Native PIPU9

  mountain ricegrass · Poaceae 4 counties
• 
  Piptochaetium avenaceum (L.) Parodi Native PIAV

  blackseed speargrass · Poaceae 7 counties
• 
  Pisum sativum L. Introduced PISA6

  garden pea · Fabaceae 8 counties
• 
  Plantago arenaria Waldst. & Kit. Introduced PLAR6

  sand plantain · Plantaginaceae 3 counties
• 
  Plantago aristata Michx. Native PLAR3

  largebracted plantain · Plantaginaceae 36 counties
• 
  Plantago coronopus L. Introduced PLCO3

  buckhorn plantain · Plantaginaceae 1 county
• 
  Plantago heterophylla Nutt. Native PLHE2

  slender plantain · Plantaginaceae 1 county
• 
  Plantago lanceolata L. Introduced PLLA

  narrowleaf plantain · Plantaginaceae 67 counties
• 
  Plantago major L. Introduced PLMA2

  common plantain · Plantaginaceae 55 counties
• 
  Plantago media L. Introduced PLME

  hoary plantain · Plantaginaceae 3 counties
• 
  Plantago pusilla Nutt. Native PLPU

  dwarf plantain · Plantaginaceae 2 counties
• 
  Plantago rugelii Decne. Native PLRU

  blackseed plantain · Plantaginaceae 66 counties
• 
  Plantago rugelii Decne. var. rugelii Native PLRUR

  blackseed plantain · Plantaginaceae 66 counties
• 
  Plantago virginica L. Native PLVI

  Virginia plantain · Plantaginaceae 43 counties
• 
  Platanthera blephariglottis (Willd.) Lindl. Native PLBL

  white fringed orchid · Orchidaceae 9 counties
• 
  Platanthera blephariglottis (Willd.) Lindl. var. blephariglottis Native PLBLB

  white fringed orchid · Orchidaceae 9 counties
• 
  Platanthera ciliaris (L.) Lindl. Native PLCI2

  yellow fringed orchid · Orchidaceae 34 counties
• 
  Platanthera clavellata (Michx.) Luer Native PLCL

  small green wood orchid · Orchidaceae 49 counties
• 
  Platanthera cristata (Michx.) Lindl. Native PLCR

  crested yellow orchid · Orchidaceae 1 county
• 
  Platanthera dilatata (Pursh) Lindl. ex Beck Native PLDI3

  scentbottle · Orchidaceae 4 counties
• 
  Platanthera dilatata (Pursh) Lindl. ex Beck var. dilatata Native PLDID

  scentbottle · Orchidaceae 4 counties
• 
  Platanthera flava (L.) Lindl. Native PLFL

  palegreen orchid · Orchidaceae 39 counties
• 
  Platanthera flava (L.) Lindl. var. flava Native PLFLF

  palegreen orchid · Orchidaceae 1 county
• 
  Platanthera flava (L.) Lindl. var. herbiola (R. Br.) Luer Native PLFLH

  palegreen orchid · Orchidaceae 38 counties
• 
  Platanthera grandiflora (Bigelow) Lindl. Native PLGR2

  greater purple fringed orchid · Orchidaceae 40 counties
• 
  Platanthera hookeri (Torr. ex A. Gray) Lindl. Native PLHO3

  Hooker's orchid · Orchidaceae 19 counties
• 
  Platanthera huronensis (Nutt.) Lindl. Native PLHU2

  Huron green orchid · Orchidaceae 5 counties
• 
  Platanthera lacera (Michx.) G. Don Native PLLA2

  green fringed orchid · Orchidaceae 49 counties
• 
  Platanthera leucophaea (Nutt.) Lindl. Native PLLE2

  prairie white fringed orchid · Orchidaceae 1 county
• 
  Platanthera macrophylla (Goldie) P.M. Brown Native PLMA9

  greater roundleaved orchid · Orchidaceae 6 counties
• 
  Platanthera orbiculata (Pursh) Lindl. Native PLOR4

  lesser roundleaved orchid · Orchidaceae 43 counties
• 
  Platanthera peramoena (A. Gray) A. Gray Native PLPE

  purple fringeless orchid · Orchidaceae 9 counties
• 
  Platanthera psycodes (L.) Lindl. Native PLPS2

  lesser purple fringed orchid · Orchidaceae 45 counties
• 
  Platanthera ×shriveri P.M. Br., (pro. sp.) [grandiflora × lacera] Native PLSH4

  Shriver's purple fringed orchid · Orchidaceae 1 county
• 
  Platanus occidentalis L. Native PLOC

  American sycamore · Platanaceae 63 counties
• 
  Platycodon grandiflorus (Jacq.) A. DC. Introduced PLGR7

  balloon-flower · Campanulaceae 3 counties
• 
  Pluchea odorata (L.) Cass. Native PLOD

  sweetscent · Asteraceae 4 counties
• 
  Pluchea odorata (L.) Cass. var. succulenta (Fernald) Cronquist Native PLODS

  sweetscent · Asteraceae 4 counties
• 
  Poa alsodes A. Gray Native POAL3

  grove bluegrass · Poaceae 51 counties
• 
  Poa annua L. Introduced POAN

  annual bluegrass · Poaceae 60 counties
• 
  Poa arida Vasey Native POAR3

  plains bluegrass · Poaceae 1 county
• 
  Poa autumnalis Muhl. ex Elliott Native POAU

  autumn bluegrass · Poaceae 5 counties
• 
  Poa bulbosa L. Introduced POBU

  bulbous bluegrass · Poaceae 1 county