Russian Knapweed

Herbarium Specimen..

Summary[edit] Description: English: Rhaponticum repens - The Russian Knapweed is an invasive species that has invaded pastures, degraded croplands, rangeland, roadsides, riparian areas, and irrigation ditches in New Mexico. Invasive species are organisms that are non-native to an ecosystem and whose introduction causes economic, social, or environmental harm. The U.S. Department of Agriculture’s (USDA) Cooperative State Research, Education, and Extension Service (CSREES) is actively engaged in the battle against invasive species through leadership, grant opportunities, and collaboration with partners. USDA photo by Bob Nichols. Date: 3 June 2008, 21:07:35. Source: U.S. Department of Agriculture (USDA) [1]. Author: Bob Nichols.

Summary[edit] Description: This species is confined to highly disturbed settings. Date: 30 September 2010, 12:40. Source: Acroptilon repens. Author: Matt Lavin from Bozeman, Montana, USA. Camera location45° 07′ 56.45″ N, 108° 46′ 06.18″ W View all coordinates using: OpenStreetMap 45.132347; -108.768384.

Description: Rhaponticum repens (syn. Acroptilon repens) near Cold Creek Fire Station, Spring Mountains, southern Nevada (elev. about 1800 m). Date: 13 September 2008. Source: Own work. Author: Stan Shebs. Stan Shebs, the copyright holder of this work, hereby publishes it under the following licenses: : Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue. : This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.:. Attribution: Stan Shebs. https://creativecommons.org/licenses/by-sa/3.0 CC BY-SA 3.0 Creative Commons Attribution-Share Alike 3.0 truetrue. : This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic license.:. Attribution: Stan Shebs. https://creativecommons.org/licenses/by-sa/2.5 CC BY-SA 2.5 Creative Commons Attribution-Share Alike 2.5 truetrue. You may select the license of your choice.

Summary[edit] Description: This species is confined to highly disturbed settings. Date: 30 September 2010, 12:39. Source: Acroptilon repens. Author: Matt Lavin from Bozeman, Montana, USA. Camera location45° 07′ 56.45″ N, 108° 46′ 06.18″ W View all coordinates using: OpenStreetMap 45.132347; -108.768384.

Description: Rhaponticum repens (syn. Acroptilon repens) near Cold Creek Fire Station, Spring Mountains, southern Nevada (elev. about 1800 m). Date: 13 September 2008. Source: Own work. Author: Stan Shebs. Stan Shebs, the copyright holder of this work, hereby publishes it under the following licenses: : Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue. : This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.:. Attribution: Stan Shebs. https://creativecommons.org/licenses/by-sa/3.0 CC BY-SA 3.0 Creative Commons Attribution-Share Alike 3.0 truetrue. : This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic license.:. Attribution: Stan Shebs. https://creativecommons.org/licenses/by-sa/2.5 CC BY-SA 2.5 Creative Commons Attribution-Share Alike 2.5 truetrue. You may select the license of your choice.

Summary[edit] Description: The sagebrush steppe that remains right around the town of Roosevelt includes not Bromus tectorum but rather dense stands of Acroptilon repens (hardheads or Russian knapweed). Aside from very few stems of Bromus tectorum, no other grass or herb species was observed in this vegetation. Date: 22 August 2015, 06:11. Source: Wyoming big sagebrush steppe (with Acroptilon repens): SW side of Roosevelt UT. Author: Matt Lavin from Bozeman, Montana, USA. Camera location 40° 15′ 50.35″ N, 110° 02′ 58.77″ W : View all coordinates using: OpenStreetMap - Google Earth: 40.263986; -110.049659.

Description: Rhaponticum repens (syn. Acroptilon repens) near Cold Creek Fire Station, Spring Mountains, southern Nevada (elev. about 1800 m). Date: 13 September 2008. Source: Own work. Author: Stan Shebs. Stan Shebs, the copyright holder of this work, hereby publishes it under the following licenses: : Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue. : This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.:. Attribution: Stan Shebs. https://creativecommons.org/licenses/by-sa/3.0 CC BY-SA 3.0 Creative Commons Attribution-Share Alike 3.0 truetrue. : This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic license.:. Attribution: Stan Shebs. https://creativecommons.org/licenses/by-sa/2.5 CC BY-SA 2.5 Creative Commons Attribution-Share Alike 2.5 truetrue. You may select the license of your choice.

Description: Rhaponticum repens (syn. Acroptilon repens) near Cold Creek Fire Station, Spring Mountains, southern Nevada (elev. about 1800 m). Date: 13 September 2008. Source: Own work. Author: Stan Shebs. Stan Shebs, the copyright holder of this work, hereby publishes it under the following licenses: : Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue. : This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.:. Attribution: Stan Shebs. https://creativecommons.org/licenses/by-sa/3.0 CC BY-SA 3.0 Creative Commons Attribution-Share Alike 3.0 truetrue. : This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic license.:. Attribution: Stan Shebs. https://creativecommons.org/licenses/by-sa/2.5 CC BY-SA 2.5 Creative Commons Attribution-Share Alike 2.5 truetrue. You may select the license of your choice.

Summary[edit] Description: The sagebrush steppe that remains right around the town of Roosevelt includes not Bromus tectorum but rather dense stands of Acroptilon repens (hardheads or Russian knapweed). Aside from very few stems of Bromus tectorum, no other grass or herb species was observed in this vegetation. Date: 22 August 2015, 06:09. Source: Wyoming big sagebrush steppe (with Acroptilon repens): SW side of Roosevelt UT. Author: Matt Lavin from Bozeman, Montana, USA. Camera location 40° 15′ 51.54″ N, 110° 02′ 58.67″ W : View all coordinates using: OpenStreetMap - Google Earth: 40.264316; -110.049631.

Description: Rhaponticum repens (syn. Acroptilon repens) near Cold Creek Fire Station, Spring Mountains, southern Nevada (elev. about 1800 m). Date: 13 September 2008. Source: Own work. Author: Stan Shebs. Stan Shebs, the copyright holder of this work, hereby publishes it under the following licenses: : Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue. : This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.:. Attribution: Stan Shebs. https://creativecommons.org/licenses/by-sa/3.0 CC BY-SA 3.0 Creative Commons Attribution-Share Alike 3.0 truetrue. : This file is licensed under the Creative Commons Attribution-Share Alike 2.5 Generic license.:. Attribution: Stan Shebs. https://creativecommons.org/licenses/by-sa/2.5 CC BY-SA 2.5 Creative Commons Attribution-Share Alike 2.5 truetrue. You may select the license of your choice.

Rhaponticum repens is a Class B noxious weed in Utah listed under the name Centaurea repens by which it is more commonly known. Another synonym is Acroptilon repens.It is non-native plant species that forms dense clusters of plants leading to a monoculture that suppresses (suspected to be allelopathic) other plant species reducing forage for wildlife and biodiversity in general.Aug. 31, 2014, Salt Lake valley, roughly six miles east of the Great Salt Lake, open space undergoing development in the corner of an industrial park, highly disturbed vernally moist saline meadow habitat, approx. 4,230 ft. elev.

Rhaponticum repens is a Class B noxious weed in Utah listed under the name Centaurea repens by which it is more commonly known. Another synonym is Acroptilon repens.It is a non-native plant species that ultimately forms dense clusters of plants leading to a monoculture that suppresses (suspected to be allelopathic) other plant species reducing forage for wildlife and biodiversity in general.Aug. 31, 2014, Salt Lake valley, roughly six miles east of the Great Salt Lake, open space undergoing development in the corner of an industrial park, highly disturbed vernally moist saline meadow habitat, approx. 4,230 ft. elev.