Washington County

Showing 51–100 of 954.

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  Anemone virginiana L. var. virginiana Native ANVIV2

  tall thimbleweed · Ranunculaceae
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  Angelica atropurpurea L. Native ANAT

  purplestem angelica · Apiaceae
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  Angelica venenosa (Greenway) Fernald Native ANVE

  hairy angelica · Apiaceae
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  Antennaria solitaria Rydb. Native ANSO

  singlehead pussytoes · Asteraceae
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  Anthemis cotula L. Introduced ANCO2

  stinking chamomile · Asteraceae
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  Apios americana Medik. Native APAM

  groundnut · Fabaceae
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  Aplectrum hyemale (Muhl. ex Willd.) Torr. Native APHY

  Adam and Eve · Orchidaceae
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  Apocynum cannabinum L. Native APCA

  Indianhemp · Apocynaceae
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  Aquilegia canadensis L. Native AQCA

  red columbine · Ranunculaceae
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  Arabidopsis thaliana (L.) Heynh. Introduced ARTH

  mouseear cress · Brassicaceae
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  Arabis canadensis L. Native ARCA

  sicklepod · Brassicaceae
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  Arabis laevigata (Muhl. ex Willd.) Poir. Native ARLA

  smooth rockcress · Brassicaceae
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  Arabis laevigata (Muhl. ex Willd.) Poir. var. laevigata Native ARLAL

  smooth rockcress · Brassicaceae
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  Arabis shortii (Fernald) Gleason Native ARSH2

  Short's rockcress · Brassicaceae
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  Aralia racemosa L. Native ARRA

  American spikenard · Araliaceae
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  Aralia racemosa L. ssp. racemosa Native ARRAR

  American spikenard · Araliaceae
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  Arctium minus Bernh. Introduced ARMI2

  lesser burdock · Asteraceae
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  Argemone mexicana L. Native ARME4

  Mexican pricklypoppy · Papaveraceae
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  Arisaema dracontium (L.) Schott Native ARDR3

  green dragon · Araceae
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  Arisaema triphyllum (L.) Schott Native ARTR

  Jack in the pulpit · Araceae
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  Arisaema triphyllum (L.) Schott ssp. triphyllum Native ARTRT3

  Jack in the pulpit · Araceae
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  Aristida dichotoma Michx. Native ARDI4

  churchmouse threeawn · Poaceae
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  Aristida dichotoma Michx. var. dichotoma Native ARDID

  churchmouse threeawn · Poaceae
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  Aristida oligantha Michx. Native AROL

  prairie threeawn · Poaceae
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  Aristolochia serpentaria L. Native ARSE3

  Virginia snakeroot · Aristolochiaceae
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  Arnoglossum atriplicifolium (L.) H. Rob. Native ARAT

  pale Indian plantain · Asteraceae
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  Aruncus dioicus (Walter) Fernald Both ARDI8

  bride's feathers · Rosaceae
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  Aruncus dioicus (Walter) Fernald var. dioicus Native ARDID2

  bride's feathers · Rosaceae
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  Asarum canadense L. Native ASCA

  Canadian wildginger · Aristolochiaceae
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  Asclepias amplexicaulis Sm. Native ASAM

  clasping milkweed · Asclepiadaceae
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  Asclepias exaltata L. Native ASEX

  poke milkweed · Asclepiadaceae
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  Asclepias hirtella (Pennell) Woodson Native ASHI

  green milkweed · Asclepiadaceae
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  Asclepias incarnata L. Native ASIN

  swamp milkweed · Asclepiadaceae
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  Asclepias incarnata L. ssp. incarnata Native ASINI

  swamp milkweed · Asclepiadaceae
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  Asclepias purpurascens L. Native ASPU2

  purple milkweed · Asclepiadaceae
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  Asclepias quadrifolia Jacq. Native ASQU

  fourleaf 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
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  Asimina triloba (L.) Dunal Native ASTR

  pawpaw · Annonaceae
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  Asplenium bradleyi D.C. Eaton Native ASBR2

  Bradley's spleenwort · Aspleniaceae
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  Asplenium pinnatifidum Nutt. Native ASPI

  lobed spleenwort · Aspleniaceae
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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
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  Asplenium rhizophyllum L. Native ASRH2

  walking fern · Aspleniaceae
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  Asplenium ×ebenoides R.R. Scott (pro sp.) [platyneuron × rhizophyllum] Native ASEB

  spleenwort · Aspleniaceae
• ⚘
  Asplenium ×trudellii Wherry (pro sp.) [montanum × pinnatifidum] Native ASTR11

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

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

  subarctic ladyfern · Dryopteridaceae
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  Atriplex patula L. Introduced ATPA4

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

  triangle orache · Chenopodiaceae