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 1,251–1,300 of 3,901.

• 
  Drosera rotundifolia L. var. rotundifolia Native DRROR

  roundleaf sundew · Droseraceae 42 counties
• 
  Dryopteris campyloptera Clarkson Native DRCA3

  mountain woodfern · Dryopteridaceae 6 counties
• 
  Dryopteris carthusiana (Vill.) H.P. Fuchs Native DRCA11

  spinulose woodfern · Dryopteridaceae 67 counties
• 
  Dryopteris celsa (Wm. Palmer) Knowlt., Palmer & Pollard ex Small Native DRCE

  log fern · Dryopteridaceae 9 counties
• 
  Dryopteris clintoniana (D.C. Eaton) Dowell Native DRCL

  Clinton's woodfern · Dryopteridaceae 19 counties
• 
  Dryopteris cristata (L.) A. Gray Native DRCR4

  crested woodfern · Dryopteridaceae 63 counties
• 
  Dryopteris goldieana (Hook. ex Goldie) A. Gray Native DRGO3

  Goldie's woodfern · Dryopteridaceae 43 counties
• 
  Dryopteris intermedia (Muhl. ex Willd.) A. Gray Native DRIN5

  intermediate woodfern · Dryopteridaceae 67 counties
• 
  Dryopteris marginalis (L.) A. Gray Native DRMA4

  marginal woodfern · Dryopteridaceae 67 counties
• ⚘
  Dryopteris ×boottii (Tuck.) Underw. (pro sp.) [cristata × intermedia] Native DRBO2

  woodfern · Dryopteridaceae 42 counties
• ⚘
  Dryopteris ×mickelii J.H. Peck [goldiana × clintoniana] Native DRMI6

  woodfern · Dryopteridaceae 1 county
• ⚘
  Dryopteris ×slossoniae Wherry ex Lellinger [cristata × marginalis] Native DRSL

  woodfern · Dryopteridaceae 21 counties
• ⚘
  Dryopteris ×triploidea Wherry [carthusiana × intermedia] Native DRTR

  woodfern · Dryopteridaceae 58 counties
• ⚘
  Dryopteris ×uliginosa (A. Braun ex Dowell) Druce [carthusiana × cristata] Native DRUL2

  woodfern · Dryopteridaceae 20 counties
• 
  Duchesnea indica (Andrews) Teschem. Introduced DUIN2

  Indian strawberry · Rosaceae 17 counties
• 
  Dulichium arundinaceum (L.) Britton Native DUAR3

  three-way sedge · Cyperaceae 59 counties
• 
  Dulichium arundinaceum (L.) Britton var. arundinaceum Native DUARA

  three-way sedge · Cyperaceae 59 counties
• 
  Dysphania ambrosioides (L.) Mosyakin & Clemants Both DYAM

  Mexican tea · Chenopodiaceae 33 counties
• 
  Dysphania botrys (L.) Mosyakin & Clemants Introduced DYBO

  Jerusalem oak goosefoot · Chenopodiaceae 33 counties
• 
  Dysphania multifida (L.) Mosyakin & Clemants Introduced DYMU

  cutleaf goosefoot · Chenopodiaceae 3 counties
• 
  Dysphania pumilio (R. Br.) Mosyakin & Clemants Introduced DYPU

  clammy goosefoot · Chenopodiaceae 5 counties
• 
  Dyssodia papposa (Vent.) Hitchc. Native DYPA

  fetid marigold · Asteraceae 2 counties
• 
  Ecballium elaterium (L.) A. Rich. Introduced ECEL

  squirting cucumber · Cucurbitaceae 1 county
• 
  Echinacea laevigata (C.L. Boynt. & Beadle) S.F. Blake Native ECLA

  smooth purple coneflower · Asteraceae 1 county
• 
  Echinacea purpurea (L.) Moench Native ECPU

  eastern purple coneflower · Asteraceae 2 counties
• 
  Echinochloa colona (L.) Link Introduced ECCO2

  jungle rice · Poaceae 1 county
• 
  Echinochloa crus-galli (L.) P. Beauv. Introduced ECCR

  barnyardgrass · Poaceae 62 counties
• ⚘
  Echinochloa frumentacea Link Introduced ECFR

  billion-dollar grass · Poaceae 7 counties
• 
  Echinochloa muricata (P. Beauv.) Fernald Native ECMU2

  rough barnyardgrass · Poaceae 62 counties
• 
  Echinochloa muricata (P. Beauv.) Fernald var. microstachya Wiegand Native ECMUM

  rough barnyardgrass · Poaceae 1 county
• 
  Echinochloa muricata (P. Beauv.) Fernald var. muricata Native ECMUM2

  rough barnyardgrass · Poaceae 1 county
• 
  Echinochloa walteri (Pursh) A. Heller Native ECWA

  coast cockspur grass · Poaceae 3 counties
• 
  Echinocystis lobata (Michx.) Torr. & A. Gray Native ECLO

  wild cucumber · Cucurbitaceae 57 counties
• 
  Echinops sphaerocephalus L. Introduced ECSP

  great globethistle · Asteraceae 3 counties
• 
  Echium plantagineum L. Introduced ECPL

  salvation jane · Boraginaceae 1 county
• 
  Echium vulgare L. Introduced ECVU

  common viper's bugloss · Boraginaceae 52 counties
• 
  Eclipta prostrata (L.) L. Native ECPR

  false daisy · Asteraceae 20 counties
• 
  Egeria densa Planch. Introduced EGDE

  Brazilian waterweed · Hydrocharitaceae 4 counties
• 
  Elaeagnus angustifolia L. Introduced ELAN

  Russian olive · Elaeagnaceae 8 counties
• 
  Elaeagnus umbellata Thunb. Introduced ELUM

  autumn olive · Elaeagnaceae 21 counties
• 
  Elaeagnus umbellata Thunb. var. parvifolia (Wall. ex Royle) C.K. Schneid. Introduced ELUMP

  autumn olive · Elaeagnaceae 21 counties
• 
  Elatine americana (Pursh) Arn. Native ELAM3

  American waterwort · Elatinaceae 4 counties
• 
  Elatine minima (Nutt.) Fisch. & C.A. Mey. Native ELMI

  small waterwort · Elatinaceae 6 counties
• 
  Eleocharis acicularis (L.) Roem. & Schult. Native ELAC

  needle spikerush · Cyperaceae 50 counties
• 
  Eleocharis acicularis (L.) Roem. & Schult. var. acicularis Native ELACA

  needle spikerush · Cyperaceae 50 counties
• 
  Eleocharis compressa Sull. Native ELCO2

  flatstem spikerush · Cyperaceae 4 counties
• 
  Eleocharis compressa Sull. var. compressa Native ELCOC2

  flatstem spikerush · Cyperaceae 4 counties
• 
  Eleocharis elliptica Kunth Native ELEL4

  elliptic spikerush · Cyperaceae 7 counties
• 
  Eleocharis engelmannii Steud. Native ELEN

  Engelmann's spikerush · Cyperaceae 16 counties
• 
  Eleocharis erythropoda Steud. Native ELER

  bald spikerush · Cyperaceae 47 counties