| 词条 | Centaurea jacea |
| 释义 |
|image = Centaurea jacea 01.JPG |image2 = Bombus lapidarius - Centaurea jacea - Keila.jpg |genus = Centaurea |species = jacea |authority = 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 {{convert|10|–|80|cm|0}} 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 flower heads always look as if they are rayed, forming a more open star rather than a brush-like tuft. References1. ^{{cite web|title=BSBI List 2007|publisher=Botanical Society of Britain and Ireland |url=http://www.bsbi.org.uk/BSBIList2007.xls|format=xls|accessdate=2014-10-17|archiveurl=https://www.webcitation.org/6VqJ46atN?url=http://www.bsbi.org.uk/BSBIList2007.xls|archivedate=2015-01-25}} 2. ^{{cite book|last=Rose|first=Francis|authorlink=Francis Rose|title=The Wild Flower Key|year=1981|publisher=Frederick Warne & Co|isbn=0-7232-2419-6|pages=386–387}} External links
4 : Centaurea|Flora of Norway|Plants described in 1753|Taxa named by Carl Linnaeus |
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