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 401–450 of 3,901.

• 
  Bidens pilosa L. Introduced BIPI

  hairy beggarticks · Asteraceae 1 county
• 
  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
• 
  Borago officinalis L. Introduced BOOF

  common borage · Boraginaceae 4 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
• 
  Brassica juncea (L.) Czern. Introduced BRJU

  brown mustard · Brassicaceae 37 counties
• 
  Brassica nigra (L.) W.D.J. Koch Introduced BRNI

  black mustard · Brassicaceae 39 counties
• 
  Brassica oleracea L. Introduced BROL

  cabbage · Brassicaceae 5 counties
• 
  Brassica rapa L. Introduced BRRA

  field mustard · Brassicaceae 27 counties
• 
  Brassica rapa L. var. rapa Introduced BRRAR

  field mustard · Brassicaceae 27 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
• 
  Briza media L. Introduced BRME

  perennial quakinggrass · Poaceae 3 counties
• 
  Briza minor L. Introduced BRMI2

  little quakinggrass · Poaceae 1 county
• 
  Bromus arenarius Labill. Introduced BRAR3

  Australian brome · Poaceae 1 county
• 
  Bromus arvensis L. Introduced BRAR5

  field brome · Poaceae 42 counties
• 
  Bromus briziformis Fisch. & C.A. Mey. Introduced BRBR5

  rattlesnake brome · Poaceae 1 county
• 
  Bromus catharticus Vahl Introduced BRCA6

  rescuegrass · Poaceae 1 county
• 
  Bromus ciliatus L. Native BRCI2

  fringed brome · Poaceae 26 counties
• 
  Bromus ciliatus L. var. ciliatus Native BRCIC3

  fringed brome · Poaceae 26 counties
• 
  Bromus hordeaceus L. Introduced BRHO2

  soft brome · Poaceae 12 counties
• 
  Bromus hordeaceus L. ssp. hordeaceus Introduced BRHOH

  soft brome · Poaceae 12 counties
• 
  Bromus inermis Leyss. Both BRIN2

  smooth brome · Poaceae 44 counties
• 
  Bromus inermis Leyss. ssp. inermis Introduced BRINI

  smooth brome · Poaceae 44 counties
• 
  Bromus inermis Leyss. ssp. inermis var. inermis Introduced BRINI2

  smooth brome · Poaceae 1 county
• 
  Bromus kalmii A. Gray Native BRKA2

  arctic brome · Poaceae 15 counties
• 
  Bromus latiglumis (Shear) Hitchc. Native BRLA4

  earlyleaf brome · Poaceae 50 counties
• 
  Bromus pubescens Muhl. ex Willd. Native BRPU6

  hairy woodland brome · Poaceae 53 counties