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 2,801–2,850 of 3,901.

• 
  Potentilla reptans L. Introduced PORE6

  creeping cinquefoil · Rosaceae 5 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 laciniata (L.) L. Introduced PRLA7

  cutleaf selfheal · Lamiaceae 4 counties
• 
  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 armeniaca L. Introduced PRAR3

  apricot · Rosaceae 3 counties
• 
  Prunus avium (L.) L. Introduced PRAV

  sweet cherry · Rosaceae 49 counties
• 
  Prunus cerasifera Ehrh. Introduced PRCE2

  cherry plum · Rosaceae 2 counties
• 
  Prunus cerasus L. Introduced PRCE

  sour cherry · Rosaceae 13 counties
• 
  Prunus domestica L. Introduced PRDO

  European plum · Rosaceae 9 counties
• 
  Prunus domestica L. var. domestica Introduced PRDOD

  European plum · Rosaceae 5 counties
• 
  Prunus domestica L. var. insititia (L.) Fiori & Paoletti Introduced PRDOI

  European plum · Rosaceae 4 counties
• 
  Prunus mahaleb L. Introduced PRMA

  Mahaleb cherry · Rosaceae 8 counties
• 
  Prunus maritima Marshall Native PRMA2

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

  beach plum · Rosaceae 2 counties
• 
  Prunus padus L. Introduced PRPA5

  European bird cherry · Rosaceae 7 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
• 
  Prunus persica (L.) Batsch Introduced PRPE3

  peach · Rosaceae 30 counties
• 
  Prunus persica (L.) Batsch var. persica Introduced PRPEP2

  peach · Rosaceae 30 counties
• 
  Prunus pumila L. Native PRPU3

  sandcherry · Rosaceae 28 counties
• 
  Prunus pumila L. var. depressa (Pursh) Gleason Native PRPUD

  eastern sandcherry · Rosaceae 17 counties
• 
  Prunus pumila L. var. pumila Native PRPUP

  Great Lakes sandcherry · Rosaceae 1 county
• 
  Prunus serotina Ehrh. Native PRSE2

  black cherry · Rosaceae 67 counties
• 
  Prunus serotina Ehrh. var. serotina Native PRSES

  black cherry · Rosaceae 67 counties
• 
  Prunus susquehanae hort. ex Willd. Native PRSU3

  Sesquehana sandcherry · Rosaceae 19 counties
• 
  Prunus triloba Lindl. Introduced PRTR3

  flowering plum · Rosaceae 1 county
• 
  Prunus virginiana L. Native PRVI

  chokecherry · Rosaceae 65 counties
• 
  Prunus virginiana L. var. virginiana Native PRVIV

  chokecherry · Rosaceae 65 counties
• 
  Pseudognaphalium macounii (Greene) Kartesz Native PSMA11

  Macoun's cudweed · Asteraceae 28 counties