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 1,951–2,000 of 2,748 (native).

• 
  Potamogeton illinoensis Morong Native POIL

  Illinois pondweed · Potamogetonaceae 35 counties
• 
  Potamogeton natans L. Native PONA4

  floating pondweed · Potamogetonaceae 20 counties
• 
  Potamogeton nodosus Poir. Native PONO2

  longleaf pondweed · Potamogetonaceae 38 counties
• 
  Potamogeton oakesianus J.W. Robbins Native POOA

  Oakes' pondweed · Potamogetonaceae 15 counties
• 
  Potamogeton obtusifolius Mert. & W.D.J. Koch Native POOB2

  bluntleaf pondweed · Potamogetonaceae 1 county
• 
  Potamogeton perfoliatus L. Native POPE7

  claspingleaf pondweed · Potamogetonaceae 31 counties
• 
  Potamogeton praelongus Wulfen Native POPR5

  whitestem pondweed · Potamogetonaceae 2 counties
• 
  Potamogeton pulcher Tuck. Native POPU6

  spotted pondweed · Potamogetonaceae 3 counties
• 
  Potamogeton pusillus L. Native POPU7

  small pondweed · Potamogetonaceae 46 counties
• 
  Potamogeton richardsonii (Benn.) Rydb. Native PORI2

  Richardson's pondweed · Potamogetonaceae 1 county
• 
  Potamogeton robbinsii Oakes Native PORO2

  Robbins' pondweed · Potamogetonaceae 11 counties
• 
  Potamogeton spirillus Tuck. Native POSP3

  spiral pondweed · Potamogetonaceae 21 counties
• 
  Potamogeton strictifolius Benn. Native POST2

  narrowleaf pondweed · Potamogetonaceae 2 counties
• 
  Potamogeton tennesseensis Fernald Native POTE4

  Tennessee pondweed · Potamogetonaceae 4 counties
• 
  Potamogeton vaseyi J.W. Robbins Native POVA3

  Vasey's pondweed · Potamogetonaceae 8 counties
• 
  Potamogeton zosteriformis Fernald Native POZO

  flatstem pondweed · Potamogetonaceae 9 counties
• 
  Potentilla arguta Pursh Native POAR7

  tall cinquefoil · Rosaceae 22 counties
• 
  Potentilla arguta Pursh ssp. arguta Native POARA4

  tall cinquefoil · Rosaceae 22 counties
• 
  Potentilla canadensis L. Native POCA17

  dwarf cinquefoil · Rosaceae 55 counties
• 
  Potentilla canadensis L. var. villosissima Fernald Native POCAV

  dwarf cinquefoil · Rosaceae 1 county
• 
  Potentilla norvegica L. Native PONO3

  Norwegian cinquefoil · Rosaceae 67 counties
• 
  Potentilla norvegica L. ssp. monspeliensis (L.) Asch. & Graebn. Native PONOM

  Norwegian cinquefoil · Rosaceae 67 counties
• ⚘
  Potentilla paradoxa Nutt. Native POPA15

  Paradox cinquefoil · Rosaceae 2 counties
• 
  Potentilla simplex Michx. Native POSI2

  common cinquefoil · Rosaceae 66 counties
• 
  Prenanthes alba L. Native PRAL2

  white rattlesnakeroot · Asteraceae 42 counties
• 
  Prenanthes altissima L. Native PRAL3

  tall rattlesnakeroot · Asteraceae 64 counties
• 
  Prenanthes crepidinea Michx. Native PRCR

  nodding rattlesnakeroot · Asteraceae 4 counties
• 
  Prenanthes racemosa Michx. Native PRRA

  purple rattlesnakeroot · Asteraceae 1 county
• 
  Prenanthes racemosa Michx. var. racemosa Native PRRAR3

  purple rattlesnakeroot · Asteraceae 1 county
• 
  Prenanthes serpentaria Pursh Native PRSE

  cankerweed · Asteraceae 14 counties
• 
  Prenanthes trifoliolata (Cass.) Fernald Native PRTR

  gall of the earth · Asteraceae 55 counties
• 
  Proboscidea louisianica (Mill.) Thell. Native PRLO

  ram's horn · Pedaliaceae 11 counties
• 
  Proboscidea louisianica (Mill.) Thell. ssp. louisianica Native PRLOL

  ram's horn · Pedaliaceae 11 counties
• 
  Prosartes lanuginosa (Michx.) D. Don Native PRLA9

  yellow fairybells · Liliaceae 26 counties
• 
  Proserpinaca palustris L. Native PRPA3

  marsh mermaidweed · Haloragaceae 21 counties
• 
  Proserpinaca palustris L. var. crebra Fernald & Grisc. Native PRPAC

  marsh mermaidweed · Haloragaceae 20 counties
• 
  Proserpinaca palustris L. var. palustris Native PRPAP

  marsh mermaidweed · Haloragaceae 4 counties
• 
  Proserpinaca pectinata Lam. Native PRPE

  combleaf mermaidweed · Haloragaceae 1 county
• 
  Prunella vulgaris L. Native PRVU

  common selfheal · Lamiaceae 67 counties
• 
  Prunella vulgaris L. ssp. lanceolata (W. Bartram) Hultén Native PRVUL2

  lance selfheal · Lamiaceae 67 counties
• 
  Prunella vulgaris L. ssp. vulgaris Native PRVUV

  common selfheal · Lamiaceae 30 counties
• 
  Prunus alleghaniensis Porter Native PRAL5

  Allegheny plum · Rosaceae 13 counties
• 
  Prunus alleghaniensis Porter var. alleghaniensis Native PRALA

  Allegheny plum · Rosaceae 12 counties
• 
  Prunus americana Marshall Native PRAM

  American plum · Rosaceae 59 counties
• 
  Prunus angustifolia Marshall Native PRAN3

  Chickasaw plum · Rosaceae 1 county
• 
  Prunus angustifolia Marshall var. angustifolia Native PRANA

  Chickasaw plum · Rosaceae 1 county
• 
  Prunus maritima Marshall Native PRMA2

  beach plum · Rosaceae 2 counties
• 
  Prunus maritima Marshall var. maritima Native PRMAM

  beach plum · Rosaceae 2 counties
• 
  Prunus pensylvanica L. f. Native PRPE2

  pin cherry · Rosaceae 58 counties
• 
  Prunus pensylvanica L. f. var. pensylvanica Native PRPEP

  pin cherry · Rosaceae 58 counties