Weld County

Showing 1–50 of 731.

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  Abronia fragrans Nutt. ex Hook. Native ABFR2

  snowball sand verbena · Nyctaginaceae
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  Achnatherum hymenoides (Roem. & Schult.) Barkworth Native ACHY

  Indian ricegrass · Poaceae
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  Acroptilon repens (L.) DC. Introduced ACRE3

  hardheads · Asteraceae
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  Agalinis tenuifolia (Vahl) Raf. Native AGTE3

  slenderleaf false foxglove · Scrophulariaceae
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  Agalinis tenuifolia (Vahl) Raf. var. parviflora (Nutt.) Pennell Native AGTEP2

  slenderleaf false foxglove · Scrophulariaceae
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  Agoseris glauca (Pursh) Raf. Native AGGL

  pale agoseris · Asteraceae
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  Agropyron cristatum (L.) Gaertn. Introduced AGCR

  crested wheatgrass · Poaceae
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  Agropyron cristatum (L.) Gaertn. ssp. pectinatum (M. Bieb.) Tzvelev Introduced AGCRP8

  crested wheatgrass · Poaceae
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  Agrostis gigantea Roth Introduced AGGI2

  redtop · 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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  Aliciella pinnatifida (Nutt. ex A. Gray) J.M. Porter Native ALPI2

  sticky gilia · Polemoniaceae
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  Alisma gramineum Lej. Native ALGR

  narrowleaf water plantain · Alismataceae
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  Allium geyeri S. Watson Native ALGE

  Geyer's onion · Liliaceae
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  Allium geyeri S. Watson var. tenerum M.E. Jones Native ALGET

  bulbil onion · Liliaceae
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  Allium textile A. Nelson & J.F. Macbr. Native ALTE

  textile onion · Liliaceae
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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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  Amaranthus arenicola I.M. Johnst. Native AMAR

  sandhill amaranth · Amaranthaceae
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  Ambrosia acanthicarpa Hook. Native AMAC2

  flatspine bur ragweed · Asteraceae
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  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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  Ambrosia psilostachya DC. Native AMPS

  Cuman ragweed · Asteraceae
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  Ambrosia tomentosa Nutt. Native AMTO3

  skeletonleaf bur 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. alnifolia Native AMALA

  Saskatoon serviceberry · Rosaceae
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  Ammannia robusta Heer & Regel Native AMRO3

  grand redstem · Lythraceae
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  Amorpha fruticosa L. Native AMFR

  false indigo bush · Fabaceae
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  Anaphalis margaritacea (L.) Benth. Native ANMA

  western pearly everlasting · Asteraceae
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  Andropogon hallii Hack. Native ANHA

  sand bluestem · Poaceae
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  Anemone canadensis L. Native ANCA8

  Canadian anemone · Ranunculaceae
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  Anemopsis californica (Nutt.) Hook. & Arn. Native ANCA10

  yerba mansa · Saururaceae
• ⚘
  Antennaria parvifolia Nutt. Native ANPA4

  small-leaf pussytoes · Asteraceae
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  Apocynum cannabinum L. Native APCA

  Indianhemp · Apocynaceae
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  Arctium minus Bernh. Introduced ARMI2

  lesser burdock · Asteraceae
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  Arenaria hookeri Nutt. Native ARHO4

  Hooker's sandwort · Caryophyllaceae
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  Arenaria hookeri Nutt. ssp. hookeri Native ARHOH3

  Hooker's sandwort · Caryophyllaceae
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  Argemone hispida A. Gray Native ARHI4

  rough pricklypoppy · Papaveraceae
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  Argemone polyanthemos (Fedde) G.B. Ownbey Native ARPO2

  crested pricklypoppy · Papaveraceae
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  Aristida purpurea Nutt. Native ARPU9

  purple threeawn · Poaceae
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  Aristida purpurea Nutt. var. longiseta (Steud.) Vasey Native ARPUL

  Fendler threeawn · Poaceae
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  Aristida purpurea Nutt. var. purpurea Native ARPUP6

  purple threeawn · Poaceae
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  Arnica fulgens Pursh Native ARFU3

  foothill arnica · Asteraceae
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  Artemisia absinthium L. Introduced ARAB3

  absinthium · Asteraceae
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  Artemisia campestris L. Native ARCA12

  field sagewort · Asteraceae
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  Artemisia campestris L. ssp. caudata (Michx.) H.M. Hall & Clem. Native ARCAC

  field sagewort · Asteraceae
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  Artemisia dracunculus L. Native ARDR4

  tarragon · Asteraceae
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  Artemisia filifolia Torr. Native ARFI2

  sand sagebrush · Asteraceae
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  Artemisia frigida Willd. Native ARFR4

  prairie sagewort · Asteraceae
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  Artemisia ludoviciana Nutt. Both ARLU

  white sagebrush · Asteraceae