York County

Showing 101–150 of 1,545.

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  Armoracia rusticana G. Gaertn., B. Mey. & Scherb. Introduced ARRU4

  horseradish · Brassicaceae
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  Aronia melanocarpa (Michx.) Elliott Native ARME6

  black chokeberry · Rosaceae
• ⚘
  Aronia ×prunifolia (Marshall) Rehder, (pro sp.) [arbutifolia × melanocarpa] Native ARPR2

  purple chokeberry · Rosaceae
• 
  Arrhenatherum elatius (L.) P. Beauv. ex J. Presl & C. Presl Introduced AREL3

  tall oatgrass · Poaceae
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  Arrhenatherum elatius (L.) P. Beauv. ex J. Presl & C. Presl var. elatius Introduced ARELE

  tall oatgrass · Poaceae
• 
  Artemisia absinthium L. Introduced ARAB3

  absinthium · Asteraceae
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  Artemisia annua L. Introduced ARAN3

  sweet sagewort · Asteraceae
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  Artemisia biennis Willd. Both ARBI2

  biennial wormwood · Asteraceae
• 
  Artemisia biennis Willd. var. biennis Introduced ARBIB

  biennial wormwood · Asteraceae
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  Artemisia campestris L. Native ARCA12

  field sagewort · Asteraceae
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  Artemisia ludoviciana Nutt. Both ARLU

  white sagebrush · Asteraceae
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  Artemisia ludoviciana Nutt. ssp. ludoviciana Native ARLUL2

  white sagebrush · Asteraceae
• 
  Artemisia pontica L. Introduced ARPO4

  Roman wormwood · Asteraceae
• 
  Artemisia stelleriana Besser Introduced ARST6

  oldwoman · Asteraceae
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  Asarum canadense L. Native ASCA

  Canadian wildginger · Aristolochiaceae
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  Asclepias exaltata L. Native ASEX

  poke milkweed · Asclepiadaceae
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  Asclepias incarnata L. Native ASIN

  swamp milkweed · Asclepiadaceae
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  Asclepias syriaca L. Native ASSY

  common milkweed · Asclepiadaceae
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  Asclepias tuberosa L. Native ASTU

  butterfly milkweed · Asclepiadaceae
• 
  Asclepias tuberosa L. ssp. tuberosa Native ASTUT2

  butterfly milkweed · Asclepiadaceae
• 
  Asparagus officinalis L. Introduced ASOF

  garden asparagus · Liliaceae
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  Asplenium platyneuron (L.) Britton, Sterns & Poggenb. Native ASPL

  ebony spleenwort · Aspleniaceae
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  Asplenium platyneuron (L.) Britton, Sterns & Poggenb. var. platyneuron Native ASPLP

  ebony spleenwort · Aspleniaceae
• 
  Asplenium rhizophyllum L. Native ASRH2

  walking fern · Aspleniaceae
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  Asplenium trichomanes L. Native ASTR2

  maidenhair spleenwort · Aspleniaceae
• 
  Athyrium filix-femina (L.) Roth Native ATFI

  common ladyfern · Dryopteridaceae
• 
  Athyrium filix-femina (L.) Roth ssp. angustum (Willd.) R.T. Clausen Native ATFIA

  subarctic ladyfern · Dryopteridaceae
• 
  Atriplex glabriuscula Edmondston Native ATGL

  Scotland orache · Chenopodiaceae
• 
  Atriplex patula L. Introduced ATPA4

  spear saltbush · Chenopodiaceae
• 
  Atriplex prostrata Bouchér ex DC. Native ATPR

  triangle orache · Chenopodiaceae
• 
  Aureolaria flava (L.) Farw. Native AUFL

  smooth yellow false foxglove · Scrophulariaceae
• 
  Aureolaria flava (L.) Farw. var. flava Native AUFLF

  smooth yellow false foxglove · Scrophulariaceae
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  Aureolaria pedicularia (L.) Raf. Native AUPE2

  fernleaf yellow false foxglove · Scrophulariaceae
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  Aureolaria pedicularia (L.) Raf. var. pedicularia Native AUPEP

  fernleaf yellow false foxglove · Scrophulariaceae
• 
  Avena sativa L. Introduced AVSA

  common oat · Poaceae
• 
  Baptisia tinctoria (L.) R. Br. Native BATI

  horseflyweed · Fabaceae
• 
  Barbarea verna (Mill.) Asch. Introduced BAVE

  early yellowrocket · Brassicaceae
• 
  Barbarea vulgaris W.T. Aiton Introduced BAVU

  garden yellowrocket · Brassicaceae
• 
  Bartonia paniculata (Michx.) Muhl. Native BAPA2

  twining screwstem · Gentianaceae
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  Bartonia virginica (L.) Britton, Sterns & Poggenb. Native BAVI3

  yellow screwstem · Gentianaceae
• 
  Berberis thunbergii DC. Introduced BETH

  Japanese barberry · Berberidaceae
• 
  Berberis vulgaris L. Introduced BEVU

  common barberry · Berberidaceae
• 
  Berteroa incana (L.) DC. Introduced BEIN2

  hoary alyssum · Brassicaceae
• 
  Betula alleghaniensis Britton Native BEAL2

  yellow birch · Betulaceae
• 
  Betula lenta L. Native BELE

  sweet birch · Betulaceae
• 
  Betula papyrifera Marshall Native BEPA

  paper birch · Betulaceae
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  Betula populifolia Marshall Native BEPO

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

  blue birch · Betulaceae
• 
  Bidens aristosa (Michx.) Britton Native BIAR

  bearded beggarticks · Asteraceae
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  Bidens cernua L. Native BICE

  nodding beggartick · Asteraceae