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单词 spotted knapweed
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spotted knapweed
spotted knapweed n. North American a knapweed, Centaurea stoebe (formerly C. maculosa), native to eastern Europe and widely regarded as an invasive agricultural weed in North America.
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1913 N. L. Britton & A. Brown Illustr. Flora Northern U.S. (ed. 2) III. 558 Centaurea maculosa..Spotted Knapweed.
1954 Daily Herald (Provo, Utah) 19 Aug. 5 The spotted knapweed has no underground tentacles, but shoots up four or five new plants from a large taproot.
2012 Ecology 93 783 Centaurea stoebe (spotted knapweed) is a notorious rangeland weed that exhibited regional declines in the early 2000s, attributed to drought by some and to successful biocontrol by others.
extracted from spottedadj.n.
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