knapweed - meaning and definition. What is knapweed
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What (who) is knapweed - definition

GENUS OF PLANTS
Knapweed; Star thistle; Bullweed; Centauria; Knapweeds; Basket flower; Basket-flower; Star-thistle; Starthistle; Basketflower; Star Thistle; Centaurea (knapweed); Wagenitzia; Basket Flower; Baskerflower; Napweed
  • C. imperialis]]'' kills [[cancer]] cells in culture
  • C. bella]]'')
  • ''[[Centaurea horrida]]''
  • C. nigra]]''), perhaps the single most abundant ''Centaurea'' species of England
  • endemic]] to [[Turkey]]
  • [[Knapweed fritillary]] (''Melitaea phoebe'').<br/>This butterfly can spend their entire lives living off a patch of [[brown knapweed]] (''C. jacea'').
  • [[Yellow starthistle]] (''C. solstitialis''), an [[invasive weed]] that yields a fine [[honey]]

Knapweed         
·noun The black centaury (Centaurea nigra);
- so called from the knoblike heads of flowers. Called also bullweed.
knapweed         
¦ noun a tough-stemmed plant with purple thistle-like flower heads. [Centaurea nigra and related species.]
Origin
ME (orig. as knopweed): from knop (because of its rounded flower heads) + weed.
Melitaea phoebe         
SPECIES OF INSECT
Cinclidia phoebe; Knapweed Fritillary; Knapweed fritillary
Melitaea phoebe, the knapweed fritillary, is a butterfly of the family Nymphalidae. It is found in the Palearctic realm, except the northernmost locations.

Wikipedia

Centaurea

Centaurea () is a genus of over 700 species of herbaceous thistle-like flowering plants in the family Asteraceae. Members of the genus are found only north of the equator, mostly in the Eastern Hemisphere; the Middle East and surrounding regions are particularly species-rich. In the western United States, yellow starthistles are an invasive species. Around the year 1850, seeds from the plant had arrived to the state of California. It is believed that those seeds came from South America.