Clark County

Showing 1–50 of 537.

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  Achillea millefolium L. Both ACMI2

  common yarrow · Asteraceae
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  Achillea millefolium L. var. occidentalis DC. Native ACMIO

  western yarrow · Asteraceae
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  Aegilops cylindrica Host Introduced AECY

  jointed goatgrass · Poaceae
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  Allium canadense L. Native ALCA3

  meadow garlic · Liliaceae
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  Allium canadense L. var. fraseri Ownbey Native ALCAF

  Fraser meadow garlic · Liliaceae
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  Allium drummondii Regel Native ALDR

  Drummond's onion · Liliaceae
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  Amaranthus albus L. Introduced AMAL

  prostrate pigweed · Amaranthaceae
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  Amaranthus arenicola I.M. Johnst. Native AMAR

  sandhill amaranth · Amaranthaceae
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  Amaranthus blitoides S. Watson Introduced AMBL

  mat amaranth · Amaranthaceae
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  Amaranthus palmeri S. Watson Native AMPA

  carelessweed · Amaranthaceae
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  Amaranthus retroflexus L. Native AMRE

  redroot amaranth · Amaranthaceae
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  Ambrosia grayi (A. Nelson) Shinners Native AMGR5

  woollyleaf bur ragweed · Asteraceae
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  Ambrosia psilostachya DC. Native AMPS

  Cuman ragweed · Asteraceae
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  Ambrosia trifida L. Native AMTR

  great ragweed · Asteraceae
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  Amorpha canescens Pursh Native AMCA6

  leadplant · Fabaceae
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  Amorpha fruticosa L. Native AMFR

  false indigo bush · Fabaceae
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  Amorpha nana Nutt. Native AMNA

  dwarf false indigo · Fabaceae
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  Amphiachyris dracunculoides (DC.) Nutt. Native AMDR

  prairie broomweed · Asteraceae
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  Andropogon gerardii Vitman Native ANGE

  big bluestem · Poaceae
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  Andropogon hallii Hack. Native ANHA

  sand bluestem · Poaceae
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  Anemone berlandieri Pritz. Native ANBE

  tenpetal thimbleweed · Ranunculaceae
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  Anemone caroliniana Walter Native ANCA9

  Carolina anemone · Ranunculaceae
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  Aphanostephus skirrhobasis (DC.) Trel. Native APSK

  Arkansas dozedaisy · Asteraceae
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  Aphanostephus skirrhobasis (DC.) Trel. var. skirrhobasis Native APSKS

  Arkansas dozedaisy · Asteraceae
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  Apocynum cannabinum L. Native APCA

  Indianhemp · Apocynaceae
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  Arenaria serpyllifolia L. Introduced ARSE2

  thymeleaf sandwort · Caryophyllaceae
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  Argemone polyanthemos (Fedde) G.B. Ownbey Native ARPO2

  crested pricklypoppy · Papaveraceae
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  Argemone squarrosa Greene Native ARSQ

  hedgehog pricklypoppy · Papaveraceae
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  Argemone squarrosa Greene ssp. squarrosa Native ARSQS

  hedgehog pricklypoppy · Papaveraceae
• 
  Aristida adscensionis L. Native ARAD

  sixweeks threeawn · Poaceae
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  Aristida oligantha Michx. Native AROL

  prairie threeawn · Poaceae
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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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  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 carruthii Alph. Wood ex Carruth. Native ARCA14

  Carruth's sagewort · Asteraceae
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  Artemisia filifolia Torr. Native ARFI2

  sand sagebrush · Asteraceae
• 
  Artemisia ludoviciana Nutt. Both ARLU

  white sagebrush · Asteraceae
• 
  Artemisia ludoviciana Nutt. ssp. ludoviciana Native ARLUL2

  white sagebrush · Asteraceae
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  Asclepias asperula (Decne.) Woodson Native ASAS

  spider milkweed · Asclepiadaceae
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  Asclepias asperula (Decne.) Woodson ssp. capricornu (Woodson) Woodson Native ASASC

  antelopehorns · Asclepiadaceae
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  Asclepias engelmanniana Woodson Native ASEN

  Engelmann's milkweed · Asclepiadaceae
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  Asclepias latifolia (Torr.) Raf. Native ASLA4

  broadleaf milkweed · Asclepiadaceae
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  Asclepias pumila (A. Gray) Vail Native ASPU

  plains milkweed · Asclepiadaceae
• 
  Asclepias speciosa Torr. Native ASSP

  showy milkweed · Asclepiadaceae
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  Asclepias viridiflora Raf. Native ASVI

  green comet milkweed · Asclepiadaceae
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  Asclepias viridis Walter Native ASVI2

  green antelopehorn · Asclepiadaceae
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  Asparagus officinalis L. Introduced ASOF

  garden asparagus · Liliaceae
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  Astragalus gracilis Nutt. Native ASGR3

  slender milkvetch · Fabaceae
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  Astragalus lotiflorus Hook. Native ASLO4

  lotus milkvetch · Fabaceae