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 251–300 of 2,748 (native).

• 
  Betula alleghaniensis Britton var. alleghaniensis Native BEALA

  yellow birch · Betulaceae 1 county
• 
  Betula lenta L. Native BELE

  sweet birch · Betulaceae 58 counties
• 
  Betula nigra L. Native BENI

  river birch · Betulaceae 39 counties
• 
  Betula papyrifera Marshall Native BEPA

  paper birch · Betulaceae 29 counties
• 
  Betula papyrifera Marshall var. papyrifera Native BEPAP

  paper birch · Betulaceae 1 county
• 
  Betula populifolia Marshall Native BEPO

  gray birch · Betulaceae 32 counties
• 
  Betula pumila L. Native BEPU4

  bog birch · Betulaceae 1 county
• 
  Betula pumila L. var. pumila Native BEPUP2

  bog birch · Betulaceae 1 county
• ⚘
  Betula ×caerulea Blanch. (pro sp.) [populifolia × papyrifera var. cordifolia] Native BECA4

  blue birch · Betulaceae 1 county
• ⚘
  Betula ×caerulea Blanch. var. caerulea Native BECAC

  blue birch · Betulaceae 1 county
• 
  Bidens alba (L.) DC. Native BIAL

  romerillo · Asteraceae 1 county
• 
  Bidens alba (L.) DC. var. radiata (Sch. Bip.) Ballard ex T.E. Melchert Native BIALR

  romerillo · Asteraceae 1 county
• 
  Bidens aristosa (Michx.) Britton Native BIAR

  bearded beggarticks · Asteraceae 25 counties
• 
  Bidens beckii Torr. ex Spreng. Native BIBE2

  Beck's water-marigold · Asteraceae 4 counties
• 
  Bidens bidentoides (Nutt.) Britton Native BIBI3

  Delmarva beggarticks · Asteraceae 3 counties
• 
  Bidens bipinnata L. Native BIBI7

  Spanish needles · Asteraceae 37 counties
• 
  Bidens cernua L. Native BICE

  nodding beggartick · Asteraceae 62 counties
• 
  Bidens connata Muhl. ex Willd. Native BICO5

  purplestem beggarticks · Asteraceae 44 counties
• 
  Bidens coronata (L.) Britton Native BICO

  crowned beggarticks · Asteraceae 14 counties
• 
  Bidens discoidea (Torr. & A. Gray) Britton Native BIDI

  small beggarticks · Asteraceae 11 counties
• 
  Bidens frondosa L. Native BIFR

  devil's beggartick · Asteraceae 66 counties
• 
  Bidens laevis (L.) Britton, Sterns & Poggenb. Native BILA

  smooth beggartick · Asteraceae 9 counties
• 
  Bidens tripartita L. Native BITR

  threelobe beggarticks · Asteraceae 58 counties
• 
  Bidens vulgata Greene Native BIVU

  big devils beggartick · Asteraceae 53 counties
• 
  Blephilia ciliata (L.) Benth. Native BLCI

  downy pagoda-plant · Lamiaceae 24 counties
• 
  Blephilia hirsuta (Pursh) Benth. Native BLHI

  hairy pagoda-plant · Lamiaceae 22 counties
• 
  Blephilia hirsuta (Pursh) Benth. var. hirsuta Native BLHIH

  hairy pagoda-plant · Lamiaceae 22 counties
• 
  Boehmeria cylindrica (L.) Sw. Native BOCY

  smallspike false nettle · Urticaceae 64 counties
• 
  Bolboschoenus fluviatilis (Torr.) Soják Native BOFL3

  river bulrush · Cyperaceae 10 counties
• 
  Bolboschoenus maritimus (L.) Palla Native BOMA7

  cosmopolitan bulrush · Cyperaceae 1 county
• 
  Bolboschoenus robustus (Pursh) Soják Native BORO5

  sturdy bulrush · Cyperaceae 1 county
• 
  Boltonia asteroides (L.) L'Hér. Native BOAS

  white doll's daisy · Asteraceae 4 counties
• 
  Boltonia asteroides (L.) L'Hér. var. asteroides Native BOASA

  white doll's daisy · Asteraceae 4 counties
• 
  Boltonia montana J.F. Towns. & Kar.-Castro Native BOMO4

  Mountain Doll's Daisy · Asteraceae 2 counties
• 
  Botrychium dissectum Spreng. Native BODI2

  cutleaf grapefern · Ophioglossaceae 67 counties
• 
  Botrychium lanceolatum (S.G. Gmel.) Angstr. Native BOLA

  lanceleaf grapefern · Ophioglossaceae 40 counties
• 
  Botrychium lanceolatum (S.G. Gmel.) Angstr. var. angustisegmentum Pease & A.H. Moore Native BOLAA2

  lanceleaf grapefern · Ophioglossaceae 40 counties
• 
  Botrychium matricariifolium (A. Braun ex Dowell) A. Braun ex W.D.J. Koch Native BOMA2

  matricary grapefern · Ophioglossaceae 57 counties
• 
  Botrychium multifidum (S.G. Gmel.) Trevis. Native BOMU

  leathery grapefern · Ophioglossaceae 16 counties
• 
  Botrychium oneidense (Gilbert) House Native BOON

  bluntlobe grapefern · Ophioglossaceae 44 counties
• 
  Botrychium simplex E. Hitchc. Native BOSI

  little grapefern · Ophioglossaceae 18 counties
• 
  Botrychium virginianum (L.) Sw. Native BOVI

  rattlesnake fern · Ophioglossaceae 67 counties
• 
  Bouteloua curtipendula (Michx.) Torr. Native BOCU

  sideoats grama · Poaceae 18 counties
• 
  Bouteloua curtipendula (Michx.) Torr. var. curtipendula Native BOCUC2

  sideoats grama · Poaceae 17 counties
• 
  Brachyelytrum aristosum (Michx.) Trel. Native BRAR9

  northern shorthusk · Poaceae 1 county
• 
  Brachyelytrum erectum (Schreb. ex Spreng.) P. Beauv. Native BRER2

  bearded shorthusk · Poaceae 59 counties
• 
  Brasenia schreberi J.F. Gmel. Native BRSC

  watershield · Cabombaceae 25 counties
• 
  Brickellia eupatorioides (L.) Shinners Native BREU

  false boneset · Asteraceae 20 counties
• 
  Brickellia eupatorioides (L.) Shinners var. eupatorioides Native BREUE

  false boneset · Asteraceae 20 counties
• 
  Bromus ciliatus L. Native BRCI2

  fringed brome · Poaceae 26 counties