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knapweed

knapweed

1 9.9
A wild plant with purple, thistle-like flowers
  • noun
  • /ˈnæpˌwiːd/
translation icon : centaurea
  • Abandoned farms provide habitat for Gunnison prairie dogs and allow the spread of pernicious weeds such as Russian knapweed and camelthorn.
  • Russian knapweed

Examples

  • Weeds, such as leafy spurge and spotted knapweed.

    Academic text (2003)
  • Right away, she started to kick, and the cowboy jumped back and knocked us both down in the knapweed and thistles.

    Fiction book (1994)
  • Then there's knapweed reportedly brought to this country by someone who loved it in their native land and wanted to bring it with them.

    Blog text (1)
  • Through this network, the Frederick lab recently acquired four good candidate pathogens: two on Russian thistle, one on Russian knapweed, and another on common groundsel.

    Academic text (2000)
  • Like I've actually planted leafy spurge and knapweed into experimental plots.

  • Research by Walker and others has shown that sheep can be used to manage noxious weeds, such as leafy spurge, spotted knapweed, and tall larkspur.

    Academic text (1995)
  • Led by Douglas G. Luster, the Frederick lab is the first stop in a national campaign to reunite exotic weeds like yellow starthistle and Russian knapweed with their homeland's natural enemies.

    Academic text (2000)
  • Major weed targets now include leafy spurge, saltcedar, Russian and yellow starthistle, Russian knapweed, and perennial mustards such as hoary cress.

    Academic text (2000)
  • The colorful knapweed blooms attract various pollinators during the summer months.

  • Many farmers struggle to control the spread of knapweed in their fields due to its aggressive growth.

Synonyms

Centaurea
vsknapweed
  • Specialized
9.9

A flowering plant like knapweed or star thistle

is the common name for the individual members of that group
Centaurea scabiosa
vsknapweed
  • Specialized
9.9

A tall plant from Europe with purple flower heads that lives for several years

is the broad common name for all such species
great knapweed
vsknapweed
  • UK
9.9

A tall European plant with purple flower heads that comes back each year

is a broader term for many related species rather than one
greater knapweed
vsknapweed
  • UK
8.4

A tall plant with purple, thistle-like flowers that grows in meadows

is the general name covering several related species
Centaurea nigra
vsknapweed
  • Specialized
9.9

A wild plant with thin stiff stems and purple flower heads that grows in meadows and often spreads into fields

is the common label for members of this plant group
black knapweed
vsknapweed
8.9

A plant that lives for many years with tough stems and bright purple flower heads

is the umbrella name for many similar species
lesser knapweed
vsknapweed
  • Specialized
9.8

A wild plant common in meadows with strong stems and purple flowers that attract insects

is the broader common name used for many such plants
slender knapweed
vsknapweed
  • UK
9.3

A wildflower with thin stems and small purple flower heads

is the general term for all related species regardless of shape
Jersey knapweed
vsknapweed
  • UK
9.3

A plant from Jersey with bright purple flowers often grown in gardens

is the common name for wild and cultivated relatives of this plant

Compounds

A plant that lives for many years with tough stems and bright purple flower heads

lesser knapweed
  • Specialized
9.8

A wild plant common in meadows with strong stems and purple flowers that attract insects

A tall European plant with purple flower heads that comes back each year

A tall plant with purple, thistle-like flowers that grows in meadows

A plant from Jersey with bright purple flowers often grown in gardens

A wildflower with thin stems and small purple flower heads

Surface Forms

knapweed singular
knapweeds plural

Morphology

knapweed = knap + weed (semi-transparent) = knap + weed

The element 'weed' is transparent, but 'knap' is an uncommon/archaic root meaning 'knob' or 'tuft', so the compound's specific sense ('a tufted/knobbed plant') may not be obvious to average learners.

Etymology

Knapweed comes from an old English word cnæp meaning 'little knob' or 'head' and the word weed meaning 'plant'. The plant has round, button-like flower heads, so the name helps you remember it as a 'knob-like' or head-shaped wild plant.