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 151–200 of 3,901.

• 
  Amelanchier humilis Wiegand Native AMHU2

  low serviceberry · Rosaceae 12 counties
• 
  Amelanchier laevis Wiegand Native AMLA

  Allegheny serviceberry · Rosaceae 59 counties
• 
  Amelanchier obovalis (Michx.) Ashe Native AMOB2

  coastal serviceberry · Rosaceae 4 counties
• 
  Amelanchier sanguinea (Pursh) DC. Native AMSA

  roundleaf serviceberry · Rosaceae 8 counties
• 
  Amelanchier sanguinea (Pursh) DC. var. sanguinea Native AMSAS

  roundleaf serviceberry · Rosaceae 8 counties
• 
  Amelanchier stolonifera Wiegand Native AMST80

  running serviceberry · Rosaceae 53 counties
• 
  Amelanchier ×intermedia Spach (pro sp.) [arborea × canadensis] Native AMIN4

  serviceberry · Rosaceae 24 counties
• 
  Amianthium muscitoxicum (Walter) A. Gray Native AMMU

  flypoison · Liliaceae 28 counties
• 
  Ammannia coccinea Rottb. Native AMCO

  valley redstem · Lythraceae 5 counties
• 
  Ammi visnaga (L.) Lam. Introduced AMVI2

  toothpickweed · Apiaceae 1 county
• 
  Ammophila arenaria (L.) Link Introduced AMAR4

  European beachgrass · Poaceae 1 county
• 
  Ammophila breviligulata Fernald Native AMBR

  American beachgrass · Poaceae 3 counties
• 
  Amorpha fruticosa L. Native AMFR

  false indigo bush · Fabaceae 17 counties
• ⚘
  Ampelopsis brevipedunculata (Maxim.) Trautv. Introduced AMBR7

  Amur peppervine · Vitaceae 7 counties
• 
  Amphiachyris dracunculoides (DC.) Nutt. Native AMDR

  prairie broomweed · Asteraceae 1 county
• 
  Amphicarpaea bracteata (L.) Fernald Native AMBR2

  American hogpeanut · Fabaceae 67 counties
• 
  Amsinckia lycopsoides Lehm. Native AMLY

  tarweed fiddleneck · Boraginaceae 1 county
• 
  Amsinckia menziesii (Lehm.) A. Nelson & J.F. Macbr. Native AMME

  Menzies' fiddleneck · Boraginaceae 1 county
• 
  Amsinckia menziesii (Lehm.) A. Nelson & J.F. Macbr. var. intermedia (Fisch. & C.A. Mey.) Ganders Native AMMEI2

  common fiddleneck · Boraginaceae 1 county
• 
  Amsonia tabernaemontana Walter Native AMTA2

  eastern bluestar · Apocynaceae 4 counties
• 
  Amsonia tabernaemontana Walter var. tabernaemontana Native AMTAT

  eastern bluestar · Apocynaceae 4 counties
• 
  Anacyclus clavatus (Desf.) Pers. Introduced ANCL2

  whitebuttons · Asteraceae 1 county
• 
  Anagallis arvensis L. Introduced ANAR

  scarlet pimpernel · Primulaceae 36 counties
• 
  Anaphalis margaritacea (L.) Benth. Native ANMA

  western pearly everlasting · Asteraceae 56 counties
• 
  Anchusa arvensis (L.) M. Bieb. Introduced ANAR16

  small bugloss · Boraginaceae 1 county
• 
  Anchusa azurea Mill. Introduced ANAZ

  Italian bugloss · Boraginaceae 4 counties
• 
  Anchusa officinalis L. Introduced ANOF

  common bugloss · Boraginaceae 3 counties
• 
  Andromeda polifolia L. Native ANPO

  bog rosemary · Ericaceae 12 counties
• 
  Andromeda polifolia L. var. glaucophylla (Link) DC. Native ANPOG

  bog rosemary · Ericaceae 12 counties
• 
  Andropogon gerardii Vitman Native ANGE

  big bluestem · Poaceae 50 counties
• 
  Andropogon glomeratus (Walter) Britton, Sterns & Poggenb. Native ANGL2

  bushy bluestem · Poaceae 9 counties
• 
  Andropogon glomeratus (Walter) Britton, Sterns & Poggenb. var. glomeratus Native ANGLG2

  bushy bluestem · Poaceae 9 counties
• 
  Andropogon gyrans Ashe Native ANGY2

  Elliott's bluestem · Poaceae 6 counties
• 
  Andropogon gyrans Ashe var. gyrans Native ANGYG

  Elliott's bluestem · Poaceae 6 counties
• 
  Andropogon virginicus L. Native ANVI2

  broomsedge bluestem · Poaceae 47 counties
• 
  Andropogon virginicus L. var. virginicus Native ANVIV

  broomsedge bluestem · Poaceae 47 counties
• 
  Anemone canadensis L. Native ANCA8

  Canadian anemone · Ranunculaceae 26 counties
• 
  Anemone cylindrica A. Gray Native ANCY

  candle anemone · Ranunculaceae 2 counties
• 
  Anemone quinquefolia L. Native ANQU

  wood anemone · Ranunculaceae 57 counties
• 
  Anemone quinquefolia L. var. quinquefolia Native ANQUQ

  nightcaps · Ranunculaceae 57 counties
• 
  Anemone virginiana L. Native ANVI3

  tall thimbleweed · Ranunculaceae 66 counties
• 
  Anemone virginiana L. var. virginiana Native ANVIV2

  tall thimbleweed · Ranunculaceae 66 counties
• 
  Anethum graveolens L. Introduced ANGR2

  dill · Apiaceae 13 counties
• 
  Angelica atropurpurea L. Native ANAT

  purplestem angelica · Apiaceae 32 counties
• 
  Angelica triquinata Michx. Native ANTR2

  filmy angelica · Apiaceae 13 counties
• 
  Angelica venenosa (Greenway) Fernald Native ANVE

  hairy angelica · Apiaceae 53 counties
• 
  Anoda cristata (L.) Schltdl. Native ANCR2

  crested anoda · Malvaceae 2 counties
• 
  Antennaria howellii Greene Native ANHO

  Howell's pussytoes · Asteraceae 67 counties
• 
  Antennaria howellii Greene ssp. canadensis (Greene) Bayer Native ANHOC

  Canadian pussytoes · Asteraceae 8 counties
• 
  Antennaria howellii Greene ssp. neodioica (Greene) Bayer Native ANHON

  Howell's pussytoes · Asteraceae 67 counties