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 2,701–2,750 of 3,901.

• 
  Polygonum baldschuanicum Regel Introduced POBA3

  Bukhara fleeceflower · Polygonaceae 4 counties
• 
  Polygonum bellardii All. Introduced POBE

  narrowleaf knotweed · Polygonaceae 10 counties
• 
  Polygonum buxiforme Small Native POBU2

  box knotweed · Polygonaceae 2 counties
• 
  Polygonum careyi Olney Native POCA8

  Carey's smartweed · Polygonaceae 9 counties
• 
  Polygonum cespitosum Blume var. cespitosum Introduced POCEC

  Oriental lady's thumb · Polygonaceae 8 counties
• 
  Polygonum cespitosum Blume var. longisetum (Bruijn) A.N. Steward Introduced POCEL

  Oriental lady's thumb · Polygonaceae 40 counties
• 
  Polygonum cespitosum Blume, nom. inq. Introduced POCE4

  Oriental lady's thumb · Polygonaceae 42 counties
• 
  Polygonum cilinode Michx. Native POCI

  fringed black bindweed · Polygonaceae 45 counties
• 
  Polygonum convolvulus L. Introduced POCO10

  black bindweed · Polygonaceae 63 counties
• 
  Polygonum convolvulus L. var. convolvulus Introduced POCOC2

  black bindweed · Polygonaceae 1 county
• 
  Polygonum cuspidatum Siebold & Zucc. Introduced POCU6

  Japanese knotweed · Polygonaceae 43 counties
• 
  Polygonum erectum L. Native POER2

  erect knotweed · Polygonaceae 36 counties
• 
  Polygonum extremiorientale Vorosch. Introduced POEX2

  far-eastern smartweed · Polygonaceae 1 county
• 
  Polygonum hydropiper L. Introduced POHY

  marshpepper knotweed · Polygonaceae 64 counties
• 
  Polygonum hydropiperoides Michx. Native POHY2

  swamp smartweed · Polygonaceae 41 counties
• 
  Polygonum lapathifolium L. Native POLA4

  curlytop knotweed · Polygonaceae 48 counties
• 
  Polygonum minus Huds. Introduced POMI21

  pygmy smartweed · Polygonaceae 1 county
• 
  Polygonum nepalense Meisn. Introduced PONE9

  Nepalese smartweed · Polygonaceae 2 counties
• 
  Polygonum orientale L. Introduced POOR2

  kiss me over the garden gate · Polygonaceae 31 counties
• 
  Polygonum pensylvanicum L. Native POPE2

  Pennsylvania smartweed · Polygonaceae 64 counties
• 
  Polygonum perfoliatum L. Introduced POPE10

  Asiatic tearthumb · Polygonaceae 10 counties
• 
  Polygonum persicaria L. Introduced POPE3

  spotted ladysthumb · Polygonaceae 62 counties
• 
  Polygonum punctatum Elliott Native POPU5

  dotted smartweed · Polygonaceae 62 counties
• 
  Polygonum punctatum Elliott var. confertiflorum (Meisn.) Fassett Native POPUC2

  dotted smartweed · Polygonaceae 61 counties
• 
  Polygonum punctatum Elliott var. punctatum Native POPUP4

  dotted smartweed · Polygonaceae 35 counties
• 
  Polygonum ramosissimum Michx. Native PORA3

  bushy knotweed · Polygonaceae 3 counties
• 
  Polygonum ramosissimum Michx. var. ramosissimum Native PORAR

  bushy knotweed · Polygonaceae 3 counties
• 
  Polygonum robustius (Small) Fernald Native PORO

  stout smartweed · Polygonaceae 6 counties
• 
  Polygonum sachalinense F. Schmidt ex Maxim. Introduced POSA4

  giant knotweed · Polygonaceae 23 counties
• 
  Polygonum sagittatum L. Native POSA5

  arrowleaf tearthumb · Polygonaceae 67 counties
• 
  Polygonum scandens L. Both POSC3

  climbing false buckwheat · Polygonaceae 63 counties
• 
  Polygonum scandens L. var. cristatum (Engelm. & A. Gray) Gleason Native POSCC

  climbing false buckwheat · Polygonaceae 18 counties
• 
  Polygonum scandens L. var. dumetorum (L.) Gleason Introduced POSCD

  climbing false buckwheat · Polygonaceae 3 counties
• 
  Polygonum scandens L. var. scandens Native POSCS

  climbing false buckwheat · Polygonaceae 62 counties
• 
  Polygonum setaceum Baldw. Native POSE6

  bog smartweed · Polygonaceae 4 counties
• 
  Polygonum tenue Michx. Native POTE2

  pleatleaf knotweed · Polygonaceae 25 counties
• 
  Polygonum virginianum L. Native POVI2

  jumpseed · Polygonaceae 63 counties
• 
  Polymnia canadensis L. Native POCA11

  whiteflower leafcup · Asteraceae 15 counties
• 
  Polypodium virginianum L. Native POVI7

  rock polypody · Polypodiaceae 67 counties
• ⚘
  Polypodium ×incognitum Cusick [appalachianum × virginianum] Native POIN6

  Hybrid rock polypody · Polypodiaceae 45 counties
• 
  Polypogon monspeliensis (L.) Desf. Introduced POMO5

  annual rabbitsfoot grass · Poaceae 2 counties
• 
  Polypremum procumbens L. Native POPR4

  juniper leaf · Buddlejaceae 1 county
• 
  Polystichum acrostichoides (Michx.) Schott Native POAC4

  Christmas fern · Dryopteridaceae 67 counties
• 
  Polystichum acrostichoides (Michx.) Schott var. acrostichoides Native POACA

  Christmas fern · Dryopteridaceae 67 counties
• 
  Polystichum braunii (Spenner) Fée Native POBR4

  Braun's hollyfern · Dryopteridaceae 4 counties
• 
  Poncirus trifoliata (L.) Raf. Introduced POTR4

  hardy orange · Rutaceae 7 counties
• 
  Pontederia cordata L. Native POCO14

  pickerelweed · Pontederiaceae 22 counties
• 
  Populus alba L. Introduced POAL7

  white poplar · Salicaceae 27 counties
• 
  Populus balsamifera L. Native POBA2

  balsam poplar · Salicaceae 19 counties
• 
  Populus balsamifera L. ssp. balsamifera Native POBAB2

  balsam poplar · Salicaceae 18 counties