Polk County

Showing 51–100 of 971.

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  Anagallis minima (L.) Krause Native ANMI4

  chaffweed · Primulaceae
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  Anaphalis margaritacea (L.) Benth. Native ANMA

  western pearly everlasting · Asteraceae
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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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  Anethum graveolens L. Introduced ANGR2

  dill · Apiaceae
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  Anthemis arvensis L. Introduced ANAR6

  corn chamomile · Asteraceae
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  Anthemis cotula L. Introduced ANCO2

  stinking chamomile · Asteraceae
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  Anthoxanthum aristatum Boiss. Introduced ANAR7

  annual vernalgrass · Poaceae
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  Anthoxanthum odoratum L. Introduced ANOD

  sweet vernalgrass · Poaceae
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  Anthoxanthum odoratum L. ssp. odoratum Introduced ANODO2

  sweet vernalgrass · Poaceae
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  Anthriscus caucalis M. Bieb. Introduced ANCA14

  bur chervil · Apiaceae
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  Aphanes arvensis L. Introduced APAR2

  field parsley piert · Rosaceae
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  Apocynum androsaemifolium L. Native APAN2

  spreading dogbane · Apocynaceae
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  Apocynum cannabinum L. Native APCA

  Indianhemp · Apocynaceae
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  Aquilegia formosa Fisch. ex DC. Native AQFO

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

  mouseear cress · Brassicaceae
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  Arabis ×divaricarpa A. Nelson (pro sp.) [drummondii × holboellii] Native ARDI2

  spreadingpod rockcress · Brassicaceae
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  Arbutus menziesii Pursh Native ARME

  Pacific madrone · Ericaceae
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  Arceuthobium douglasii Engelm. Native ARDO

  Douglas-fir dwarf mistletoe · Viscaceae
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  Arctium minus Bernh. Introduced ARMI2

  lesser burdock · Asteraceae
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  Arenaria serpyllifolia L. Introduced ARSE2

  thymeleaf sandwort · Caryophyllaceae
• ⚘
  Arnica amplexicaulis Nutt. Native ARAM2

  clasping arnica · Asteraceae
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  Arrhenatherum elatius (L.) P. Beauv. ex J. Presl & C. Presl Introduced AREL3

  tall oatgrass · Poaceae
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  Artemisia absinthium L. Introduced ARAB3

  absinthium · Asteraceae
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  Artemisia douglasiana Besser Native ARDO3

  Douglas' sagewort · Asteraceae
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  Arum italicum Mill. Introduced ARIT

  Italian lords and ladies · Araceae
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  Aruncus dioicus (Walter) Fernald Both ARDI8

  bride's feathers · Rosaceae
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  Aruncus dioicus (Walter) Fernald var. acuminatus (Rydb.) Rydb. ex H. Hara Native ARDIA

  bride's feathers · Rosaceae
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  Asarum caudatum Lindl. Native ASCA2

  British Columbia wildginger · Aristolochiaceae
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  Asclepias fascicularis Decne. Native ASFA

  Mexican whorled milkweed · Asclepiadaceae
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  Asclepias speciosa Torr. Native ASSP

  showy milkweed · Asclepiadaceae
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  Asparagus officinalis L. Introduced ASOF

  garden asparagus · Liliaceae
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  Asyneuma prenanthoides (Durand) McVaugh Native ASPR10

  California harebell · Campanulaceae
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  Athyrium filix-femina (L.) Roth Native ATFI

  common ladyfern · Dryopteridaceae
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  Athyrium filix-femina (L.) Roth ssp. cyclosorum (Rupr.) C. Chr. Native ATFIC

  subarctic ladyfern · Dryopteridaceae
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  Athysanus pusillus (Hook.) Greene Native ATPU

  common sandweed · Brassicaceae
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  Avena fatua L. Introduced AVFA

  wild oat · Poaceae
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  Azolla filiculoides Lam. Native AZFI

  Pacific mosquitofern · Azollaceae
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  Azolla microphylla Kaulf. Native AZMI

  Mexican Mosquito Fern · Azollaceae
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  Baccharis pilularis DC. Native BAPI

  coyotebrush · Asteraceae
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  Balsamorhiza deltoidea Nutt. Native BADE2

  deltoid balsamroot · Asteraceae
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  Barbarea orthoceras Ledeb. Native BAOR

  American yellowrocket · Brassicaceae
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  Barbarea vulgaris W.T. Aiton Introduced BAVU

  garden yellowrocket · Brassicaceae
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  Bassia scoparia (L.) A.J. Scott Introduced BASC5

  burningbush · Chenopodiaceae
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  Beckmannia syzigachne (Steud.) Fernald Native BESY

  American sloughgrass · Poaceae
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  Bellis perennis L. Introduced BEPE2

  lawndaisy · Asteraceae
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  Beta vulgaris L. Introduced BEVU2

  common beet · Chenopodiaceae