Polk County

Showing 1–50 of 971.

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  Abies amabilis (Douglas ex Loudon) Douglas ex Forbes Native ABAM

  Pacific silver fir · Pinaceae
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  Abies grandis (Douglas ex D. Don) Lindl. Native ABGR

  grand fir · Pinaceae
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  Abies procera Rehder Native ABPR

  noble fir · Pinaceae
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  Acer circinatum Pursh Native ACCI

  vine maple · Aceraceae
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  Acer glabrum Torr. Native ACGL

  Rocky Mountain maple · Aceraceae
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  Acer glabrum Torr. var. douglasii (Hook.) Dippel Native ACGLD4

  Douglas 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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  Achnatherum lemmonii (Vasey) Barkworth Native ACLE8

  Lemmon's needlegrass · Poaceae
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  Achnatherum lemmonii (Vasey) Barkworth var. lemmonii Native ACLEL

  Lemmon's needlegrass · Poaceae
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  Actaea elata (Nutt.) Prantl Native ACEL4

  tall 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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  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 hallii Vasey Native AGHA2

  Hall's bentgrass · Poaceae
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  Agrostis microphylla Steud. Native AGMI3

  small-leaf 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
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  Aira caryophyllea L. Introduced AICA

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

  silver hairgrass · Poaceae
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  Aira elegans Willd. ex Kunth Introduced AIEL4

  annual silver hairgrass · Poaceae
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  Aira praecox L. Introduced AIPR

  yellow hairgrass · Poaceae
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  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 acuminatum Hook. Native ALAC4

  tapertip onion · Liliaceae
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  Allium amplectens Hook. Native ALAM2

  narrowleaf onion · Liliaceae
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  Allium nigrum L. Introduced ALNI

  black garlic · 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
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  Allium vineale L. ssp. vineale Introduced ALVIV

  wild garlic · Liliaceae
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  Alnus rubra Bong. Native ALRU2

  red alder · Betulaceae
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  Alopecurus aequalis Sobol. Native ALAE

  shortawn foxtail · Poaceae
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  Alopecurus aequalis Sobol. var. aequalis Native ALAEA

  shortawn foxtail · Poaceae
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  Alopecurus geniculatus L. Introduced ALGE2

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

  water foxtail · Poaceae
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  Alopecurus pratensis L. Introduced ALPR3

  meadow foxtail · Poaceae
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  Amaranthus californicus (Moq.) S. Watson Native AMCA

  California amaranth · Amaranthaceae
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  Amaranthus powellii S. Watson Native AMPO2

  Powell's amaranth · Amaranthaceae
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  Amaranthus retroflexus L. Native AMRE

  redroot amaranth · Amaranthaceae
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  Ambrosia trifida L. Native AMTR

  great ragweed · Asteraceae
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  Ambrosia trifida L. var. trifida Native AMTRT2

  great 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