Robert W. Freckmann Herbarium

  Centaurea jacea L. image
Photographer: Emmet J. Judziewicz           

Emmet J. Judziewicz

Kurt Stüber

Steve C. Garske

Steve C. Garske
Family Asteraceae
Centaurea jacea L.
brown knapweed, brown-ray knapweed
Centaurea: ancient Greek plant-name, poetically associated with Chiron, the Centaur, but without wholly satisfactory explanation
jacea: old generic name
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Introduced - naturalized
Plant: erect, perennial, 8"-32" tall forb
Flower: head 1"-1 1/4" wide with purple disk flowers, loosely thistle-like, bracts (phyllaries) fringed with brownish "eyelashes"; inflorescence a solitary head at the ends of the branches; blooms June-Sept.
Leaf:usually either undivided or toothed; lower more than 1/3" wide; larger ones possibly with a few lobes
Habitat: fields, roadsides, disturbed areas

More Information Natural Communities Herbarium Specimens
All Centaurea list Google- Images or Text

Flora of North America (off site)
There are no synonyms for this taxon.

Botany News/Events
Book We Recommend
Historical Botanists
Other Links
Botanical Club of Wisconsin (off site)
UW-Stevens Point Biology Dept.
Plants of Wisconsin
Vascular Plants
Natural Communities
Botany News/Events
Other Links
Lichens (off site)   
Tom Volk's Fungi (off site)
Taxonomy of Vascular Plants
                          Vascular Plants
Browse by Identification Guides
Family Wildflowers
Genus Trees
Common Names Shrubs
Search by Vines
Names Aquatic-Semi aquatic
Specimens Ferns - Fern Allies
Blooming Times Grasses, Sedges, or Rushes
County & Status Other Resources  
Town Range Taxonomy of Vascular Plants
  WI Checklist & CofC Values
Browse by:
Common Name
Search by:
Copyright © 2012 Permissions Contact Us Web Map