Summary ¹¹

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 cm tall, and flowers mainly from June to September.

Summary ¹²

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 cm tall, and flowers mainly from June to September.

Associations ¹³

Foodplant / saprobe
pseudothecium of Nodulosphaeria jaceae is saprobic on dead stem of Centaurea jacea x nigra (C. x moncktonii)

Associations ¹⁴

Foodplant / internal feeder
larva of Acanthiophilus helianthi feeds within capitulum of Centaurea jacea

Foodplant / internal feeder
larva of Acinia corniculata feeds within capitulum? of Centaurea jacea

Foodplant / internal feeder
larva of Chaetorellia jaceae feeds within capitulum of Centaurea jacea

Foodplant / internal feeder
larva of Chaetostomella cylindrica feeds within capitulum of Centaurea jacea

Foodplant / parasite
Golovinomyces cichoracearum parasitises live Centaurea jacea

Foodplant / internal feeder
larva of Melanagromyza dettmeri feeds within stem of Centaurea jacea

Foodplant / saprobe
pseudothecium of Nodulosphaeria jaceae is saprobic on dead stem of Centaurea jacea

Foodplant / spot causer
usually hypophyllous colony of Ramularia hyphomycetous anamorph of Ramularia triboutiana causes spots on live leaf of Centaurea jacea

Foodplant / gall
larva of Urophora jaceana causes gall of capitulum of Centaurea jacea

Foodplant / gall
larva of Urophora quadrifasciata causes gall of capitulum of Centaurea jacea

Sources and Credits

1. (c) Kari Pihlaviita, some rights reserved (CC BY-NC), https://www.flickr.com/photos/42267636@N08/7629382318/
2. (c) Dendroica cerulea, some rights reserved (CC BY), http://www.flickr.com/photos/33472394@N00/4895828772
3. (c) Udo Schmidt, some rights reserved (CC BY-SA), https://www.flickr.com/photos/coleoptera-us/7794028230/
4. (c) fotoculus, some rights reserved (CC BY-NC-SA), https://www.flickr.com/photos/fotoculus/9598196365/
5. (c) Udo Schmidt, some rights reserved (CC BY-SA), https://www.flickr.com/photos/coleoptera-us/7794022376/
6. (c) José María Escolano, some rights reserved (CC BY-NC-SA), https://www.flickr.com/photos/valdelobos/6407418955/
7. (c) keepps, some rights reserved (CC BY-NC-SA), http://www.flickr.com/photos/93799798@N00/3556177601
8. (c) keepps, some rights reserved (CC BY-NC-SA), https://www.flickr.com/photos/isg-online/3556175961/
9. (c) Giorgio___, some rights reserved (CC BY-NC-SA), https://www.flickr.com/photos/giorgio_f/7466519472/
10. (c) Thistle-Garden, some rights reserved (CC BY-NC), https://www.flickr.com/photos/63026284@N05/14620353354/
11. Adapted by Bea Steinemann from a work by (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Centaurea_jacea
12. (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Centaurea_jacea
13. (c) BioImages, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/22914361
14. (c) BioImages, some rights reserved (CC BY-NC-SA), http://eol.org/data_objects/22914360

More Info

• iNat taxon page
• Atlas of Living Australia
• Biodiversity Heritage Library
• BOLD Systems BIN search
• Calflora
• CalPhotos
• eFloras.org
• Flora Digital de Portugal
• Flora of North America (beta)
• Global Biodiversity Information Facility (GBIF)
• Go Botany
• HOSTS - a Database of the World's Lepidopteran Hostplants
• IPNI (with links to POWO, WFO, and BHL)
• Jepson eFlora
• Maryland Biodiversity Project
• NatureServe Explorer 2.0
• NBN Atlas
• OregonFlora.org
• SEINet Symbiota portals
• Tropicos
• USDA PLANTS database
• VASCAN by Canadensys
• World Flora Online

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