Centaurea jacea

Brown Knapweed
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Asterids
Order:	Asterales
Family:	Asteraceae
Tribe:	Cynareae
Genus:	Centaurea
Species:	C. jacea
Binomial name
	Centaurea jacea; L.

Centaurea jacea (Brown Knapweed^[1] or Brownray Knapweed) is a species of herbaceous perennial plants in the genus Centaurea native to dry meadows and open woodland throughout Europe. It grows to 10–80 cm tall, and flowers mainly from June to September.

In Britain, it is often found as a hybrid of Black Knapweed, Centaurea nigra.^[2]

Unlike the Black Knapweed, the flowerheads always look as if they are rayed, forming a more open star rather than a brush-like tuft.

References

^ "BSBI List 2007" (xls). Botanical Society of Britain and Ireland. Retrieved 2014-10-17.
^ Rose, Francis (1981). The Wild Flower Key. Frederick Warne & Co. pp. 386–387. ISBN 0-7232-2419-6.

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[BSBI07-1] "BSBI List 2007" (xls). Botanical Society of Britain and Ireland. Retrieved 2014-10-17.

[The_Wild_Flower_Key-2] Rose, Francis (1981). The Wild Flower Key. Frederick Warne & Co. pp. 386–387. ISBN 0-7232-2419-6.

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