Common Ornamental Grasses And Noxious Weeds

40 Questions | Total Attempts: 105

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Common Ornamental Grasses And Noxious Weeds

Test your identification of common ornamental grasses and noxious weeds of Missouri. Produced by Shaw Nature Reserve and St. Louis County Public Works.


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Questions and Answers
  • 1. 
    • A. 

      Maiden grass, Miscanthus

    • B. 

      Native sedge, Carex

    • C. 

      Japanese forest grass, Hakonechloa

  • 2. 
    • A. 

      Indian grass, Sorghastrum

    • B. 

      Big bluestem, Andropogon

    • C. 

      Little bluestem, Schizachyrium

  • 3. 
    • A. 

      Japanese forest grass, Hakonechloa

    • B. 

      Sedge, Carex

    • C. 

      Maiden grass, Miscanthus

  • 4. 
    • A. 

      Hardy pampas grass, Erianthus or Saccharum

    • B. 

      June grass, Koeleria

    • C. 

      Noxious Johnson grass, Sorghum

  • 5. 
    • A. 

      Switch grass, Panicum

    • B. 

      Moor grass, Sesleria

    • C. 

      Fountain grass, Pennisetum

  • 6. 
    • A. 

      Frost grass, Spodiopogon

    • B. 

      Melic grass, Melica

    • C. 

      Moor grass, Sesleria

  • 7. 
     
    • A. 

      Native switch grass, Panicum

    • B. 

      Noxious Johnson grass, Sorghum

    • C. 

      Native big bluestem, Andropogon

  • 8. 
    • A. 

      Japanese blood grass , Imperata

    • B. 

      Ribbon grass, Phalaris

    • C. 

      Indian grass, Sorghastrum

  • 9. 
    • A. 

      Blue oat grass, Helictorichon

    • B. 

      River oats, Uniola or Chasmanthium

    • C. 

      Melic grass, Melica

  • 10. 
    • A. 

      Cut-leaved teasel, Dipsacus laciniatus

    • B. 

      Common teasel, Dipsacus fullonum

    • C. 

      Purple coneflower, Echinacea purpurea

  • 11. 
    • A. 

      Side oats grama, Bouteloua

    • B. 

      Needle grass, Stipa

    • C. 

      Dropseed, Sporobolus

  • 12. 
    • A. 

      Feather grass, Stipa

    • B. 

      June grass, Koeleria

    • C. 

      Indian grass, Sorghastrum

  • 13. 
    • A. 

      Blue oat grass, Helictorichon

    • B. 

      Needle grass, Stipa

    • C. 

      Little bluestem, Schizachyrium

  • 14. 
    • A. 

      Native Virginia creeper, Parthenocissus quinquefolia

    • B. 

      Noxious kudzu, Pueraria lobata

    • C. 

      Noxious purple loosestrife, Lythrum salicaria

  • 15. 
    • A. 

      River oats, Uniola or Chasmanthium

    • B. 

      Quaking grass, Briza

    • C. 

      Blue oat grass, Helictorichon

  • 16. 
    • A. 

      Giant reed, Arundo

    • B. 

      Reed canarygrass, Phalaris

    • C. 

      Noxious marijuana, Cannabis sativa

  • 17. 
    • A. 

      Purple coneflower, Echinacea purpurea

    • B. 

      Cut-leaved teasel, Dipsacus laciniatus

    • C. 

      Common teasel, Dipsacus fullonum

  • 18. 
    • A. 

      Feather reed grass, Calamagrostis

    • B. 

      Dropseed, Sporobolus

    • C. 

      Indian grass, Sorghastrum

  • 19. 
    • A. 

      Cord grass, Spartina

    • B. 

      Ribbon grass, Phalaris

    • C. 

      Noxious Johnson grass, Sorghum

  • 20. 
    • A. 

      Dropseed, Sporobolus

    • B. 

      Indian grass, Sorghastrum

    • C. 

      Feather reed grass, Calamagrostis

  • 21. 
    • A. 

      Noxious musk thistle, Carduus nutans

    • B. 

      Noxious Canada thistle, Cirsium arvense

    • C. 

      Noxious Scotch thistle, Onopordum acanthium

  • 22. 
    • A. 

      Moor grass, Sesleria

    • B. 

      June grass, Koeleria

    • C. 

      Buffalo grass, Bouteloua

  • 23. 
    • A. 

      Noxious Johnson grass, Sorghum

    • B. 

      Ribbon grass, Phalaris

    • C. 

      Native Indian grass, Sorghastrum

  • 24. 
    • A. 

      Noxious kudzu, Pueraria lobata

    • B. 

      Noxious marijuana, Cannabis sativa

    • C. 

      Poison ivy, Toxicodendron radicans

  • 25. 
    • A. 

      Maiden grass, Miscanthus

    • B. 

      Gray beard, Spodiopogon

    • C. 

      Big bluestem, Andropogon

  • 26. 
    • A. 

      Noxious Johnson grass, Sorghum

    • B. 

      Ribbon grass, Phalaris

    • C. 

      Native Indian grass, Sorghastrum

  • 27. 
    • A. 

      Noxious kudzu, Pueraria lobata

    • B. 

      Noxious field bindweed, Convolvulus arvensis

    • C. 

      Noxious marijuana, Cannabis sativa

  • 28. 
     
    • A. 

      Both images are of noxious weeds

    • B. 

      Both images are of native grasses

    • C. 

      The left image is of a noxious weed and the right is of a native grass

    • D. 

      The left image is of a native grass and the right is of a noxious weed

  • 29. 
    • A. 

      Pampas grass, Erianthus

    • B. 

      Frost grass, Spodiopogon

    • C. 

      Maiden grass, Miscanthus

  • 30. 
      
    • A. 

      Frost grass, Spodiopogon

    • B. 

      Native sedge, Carex

    • C. 

      Melic grass, Melica

  • 31. 
    • A. 

      Noxious Scotch thistle, Onopordum acanthium

    • B. 

      Noxious Canada thistle, Cirsium arvense

    • C. 

      Noxious musk thistle, Carduus nutans

  • 32. 
    • A. 

      Noxious Johnson grass, Sorghum

    • B. 

      Ribbon grass, Phalaris

    • C. 

      Native Indian grass, Sorghastrum

  • 33. 
    • A. 

      Noxious purple loosestrife, Lythrum salicaria

    • B. 

      Noxious multiflora rose, Rosa multiflora

    • C. 

      Not a noxious weed

  • 34. 
    • A. 

      Blue oat grass, Helictorichon

    • B. 

      Native dropseed, Sporobolus

    • C. 

      Native wild rye, Elymus

  • 35. 
    • A. 

      Blue fescue, Festuca

    • B. 

      Switch grass, Panicum

    • C. 

      Little bluestem, Schizachyrium

  • 36. 
    • A. 

      Noxious Canada thistle, Cirsium arvense

    • B. 

      Noxious musk thistle, Carduus nutans

    • C. 

      Noxious Scotch thistle, Onopordum acanthium

  • 37. 
    • A. 

      Switch grass, Panicum

    • B. 

      Fountain grass, Pennisetum

    • C. 

      Native wild rye, Elymus

  • 38. 
    • A. 

      Multiflora rose is a desirable plant

    • B. 

      Both flowers are native

    • C. 

      The white flower is a native rose and the pink flower is a noxious weed

    • D. 

      The pink flower is a native rose and the white flower is a noxious weed

  • 39. 
    • A. 

      Noxious Scotch thistle, Onopordum acanthium

    • B. 

      Noxious common teasel, Dipsacus fullonum

    • C. 

      Noxious spotted knapweed, Centaurea stoebe ssp.micranthos

  • 40. 
    • A. 

      Noxious marijuana, Cannabis sativa

    • B. 

      Virginia creeper, Parthenocissus quinquefolia

    • C. 

      Poison ivy, Toxicodendron radicans