Yamhill County

Showing 1–50 of 871.

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  Abies grandis (Douglas ex D. Don) Lindl. Native ABGR

  grand fir · Pinaceae
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  Abutilon theophrasti Medik. Introduced ABTH

  velvetleaf · Malvaceae
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  Acer circinatum Pursh Native ACCI

  vine maple · Aceraceae
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  Acer macrophyllum Pursh Native ACMA3

  bigleaf maple · Aceraceae
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  Achillea millefolium L. Both ACMI2

  common yarrow · Asteraceae
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  Achlys triphylla (Sm.) DC. Native ACTR

  sweet after death · Berberidaceae
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  Actaea elata (Nutt.) Prantl Native ACEL4

  tall bugbane · Ranunculaceae
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  Actaea laciniata (S. Watson) J. Compton Native ACLA12

  Mt. Hood bugbane · Ranunculaceae
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  Actaea rubra (Aiton) Willd. Native ACRU2

  red baneberry · Ranunculaceae
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  Actaea rubra (Aiton) Willd. ssp. arguta (Nutt.) Hultén Native ACRUA8

  red baneberry · Ranunculaceae
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  Adenocaulon bicolor Hook. Native ADBI

  American trailplant · Asteraceae
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  Adiantum aleuticum (Rupr.) Paris Native ADAL

  Aleutian maidenhair · Pteridaceae
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  Agoseris grandiflora (Nutt.) Greene Native AGGR

  bigflower agoseris · Asteraceae
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  Agrostemma githago L. Introduced AGGI

  common corncockle · Caryophyllaceae
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  Agrostis capillaris L. Introduced AGCA5

  colonial bentgrass · Poaceae
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  Agrostis exarata Trin. Native AGEX

  spike bentgrass · Poaceae
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  Agrostis pallens Trin. Native AGPA8

  seashore bentgrass · Poaceae
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  Agrostis scabra Willd. Native AGSC5

  rough bentgrass · Poaceae
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  Agrostis stolonifera L. Introduced AGST2

  creeping bentgrass · Poaceae
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  Ailanthus altissima (Mill.) Swingle Introduced AIAL

  tree of heaven · Simaroubaceae
• 
  Aira caryophyllea L. Introduced AICA

  silver hairgrass · Poaceae
• 
  Aira caryophyllea L. var. caryophyllea Introduced AICAC2

  silver hairgrass · Poaceae
• 
  Ajuga reptans L. Introduced AJRE

  common bugle · Lamiaceae
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  Alisma triviale Pursh Native ALTR7

  northern water plantain · Alismataceae
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  Allium amplectens Hook. Native ALAM2

  narrowleaf onion · Liliaceae
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  Allium unifolium Kellogg Native ALUN

  oneleaf onion · Liliaceae
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  Allium vineale L. Introduced ALVI

  wild garlic · Liliaceae
• 
  Allium vineale L. ssp. vineale Introduced ALVIV

  wild garlic · Liliaceae
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  Alnus rhombifolia Nutt. Native ALRH2

  white alder · Betulaceae
• 
  Alnus rubra Bong. Native ALRU2

  red alder · Betulaceae
• 
  Alopecurus geniculatus L. Introduced ALGE2

  water foxtail · Poaceae
• 
  Alopecurus geniculatus L. var. geniculatus Introduced ALGEG4

  water foxtail · Poaceae
• 
  Alopecurus myosuroides Huds. Introduced ALMY

  slender meadow foxtail · Poaceae
• 
  Alopecurus pratensis L. Introduced ALPR3

  meadow foxtail · Poaceae
• 
  Ambrosia artemisiifolia L. Both AMAR2

  annual ragweed · Asteraceae
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  Ambrosia artemisiifolia L. var. elatior (L.) Descourtils Introduced AMARE

  annual ragweed · Asteraceae
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  Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem. Native AMAL2

  Saskatoon serviceberry · Rosaceae
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  Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem. var. semiintegrifolia (Hook.) C.L. Hitchc. Native AMALS

  Saskatoon serviceberry · Rosaceae
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  Amsinckia menziesii (Lehm.) A. Nelson & J.F. Macbr. Native AMME

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

  common fiddleneck · Boraginaceae
• 
  Anagallis arvensis L. Introduced ANAR

  scarlet pimpernel · Primulaceae
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  Anagallis arvensis L. ssp. arvensis Introduced ANARA7

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

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

  small bugloss · Boraginaceae
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  Anchusa azurea Mill. Introduced ANAZ

  Italian bugloss · Boraginaceae
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  Anemone deltoidea Hook. Native ANDE3

  Columbian windflower · Ranunculaceae
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  Anemone lyallii Britton Native ANLY

  Little Mountain thimbleweed · Ranunculaceae
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  Anemone oregana A. Gray Native ANOR

  blue windflower · Ranunculaceae
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  Anemone oregana A. Gray var. oregana Native ANORO

  blue windflower · Ranunculaceae
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  Angelica genuflexa Nutt. Native ANGE2

  kneeling angelica · Apiaceae