Brown-rayed Knapweed in Howard Co., Maryland (5/28/2010).
Brown-rayed Knapweed in Allegany Co., Maryland (9/13/2013).
Brown-rayed Knapweed in Garrett Co., Maryland (Date obscured). (c) johnbotany, some rights reserved (CC BY-NC).
Brown-rayed Knapweed in Garrett Co., Maryland (9/21/2019). (c) Frode Jacobsen, some rights reserved (CC BY-NC).
Map Snapshot
18 Records
Seasonality Snapshot
MBP marks as "Invasive" any taxon listed in the Maryland Invasive Species Council (MISC) list of Invasive Species of Concern in Maryland. You can read their criteria and review the lists here: https://mdinvasives.org/species-of-concern/. Use of media featured on Maryland Biodiversity Project is only permitted with express permission of the photographer.
Brown-rayed Knapweed in Allegany Co., Maryland (9/13/2013).
Media by
Jim Stasz.
Brown-rayed Knapweed in Howard Co., Maryland (5/28/2010).
View Record Details
Media by
Bill Harms.
Brown-rayed Knapweed in Allegany Co., Maryland (9/13/2013).
View Record Details
Media by
Jim Stasz.
Brown-rayed Knapweed in Garrett Co., Maryland (Date obscured). (c) johnbotany, some rights reserved (CC BY-NC).
View Record Details
Media by
John Hall.
Brown-rayed Knapweed in Garrett Co., Maryland (9/21/2019). (c) Frode Jacobsen, some rights reserved (CC BY-NC).
View Record Details
Media by
Frode Jacobsen.
Source: Wikipedia
| Centaurea jacea | |
|---|---|
| |
| |
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Centaurea |
| Species: | C. jacea
|
| Binomial name | |
| Centaurea jacea | |
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 centimetres (4–31 in) tall, and flowers mainly from June to September. It has simple leaves that are alternate in arrangement.[2]
In Britain and America, it is often found as a hybrid of black knapweed, Centaurea nigra.[3] 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.[4]
References
[edit]- ^ BSBI List 2007 (xls). Botanical Society of Britain and Ireland. Archived from the original (xls) on 2015-06-26. Retrieved 2014-10-17.
- ^ "Centaurea jacea (brown knapweed): Go Botany". gobotany.nativeplanttrust.org. Retrieved 2024-03-05.
- ^ Rose, Francis (1981). The Wild Flower Key. Frederick Warne & Co. pp. 386–387. ISBN 0-7232-2419-6.
- ^ "Centaurea x_moncktonii in Flora of North America @ efloras.org". www.efloras.org. Retrieved 24 October 2022.
External links
[edit]
Media related to Centaurea jacea at Wikimedia Commons
 | This Cardueae article is a stub. You can help Wikipedia by expanding it. |