Centaurea jacea
| Botanical Name: | Centaurea jacea |
| Common Name: | hardheads, Brown Knapweed |
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| Botanical Name | Centaurea jacea |
| Common Names | hardheads, Brown Knapweed |
| Propagation Methods | seeds |
| Synonyms | Behen jacea, Calcitrapa jacea, Calcitrapa pratensis, Centaurea commutata, Centaurea decumbens, Centaurea jacea f. alvarensis, Centaurea jacea jacea, Centaurea jacea scopulicola, Centaurea jacea subsp. lusitanica, Centaurea jacea var. genuina, Centaurea jacea var. jacea, Centaurea jacea var. pinnatifida, Centaurea lusitanica, Centaurea pratensis, Centaurea scopulicola, Centaurea variabilis, Centaurea vulgaris var. jacea, Cyanus jacea, Jacea pratensis, Jacea pratensis subsp. pratensis, Rhaponticum jacea |
Centaurea jacea, brown knapweed 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 centimetres (4–31 in) tall, and flowers mainly from June to September.
In Britain and America, it is often found as a hybrid of black knapweed, Centaurea nigra. 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.
Centaurea ×moncktonii is a fertile hybrid between black knapweed and brown knapweed.
