Coronilla varia - L.
Common Crown-vetch
Other English Common Names: Purple Crown-vetch, Trailing Crown-vetch
Other Common Names: purple crownvetch
Synonym(s): Securigera varia (L.) Lassen
Taxonomic Status: Accepted
Related ITIS Name(s): Coronilla varia L. (TSN 26553)
French Common Names: coronille bigarrée
Unique Identifier: ELEMENT_GLOBAL.2.135704
Element Code: PDFAB12020
Informal Taxonomy: Plants, Vascular - Flowering Plants - Pea Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Fabales Fabaceae Coronilla
Check this box to expand all report sections:
Concept Reference
Help
Concept Reference: Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Concept Reference Code: B94KAR01HQUS
Name Used in Concept Reference: Coronilla varia
Conservation Status
Help

NatureServe Status

Global Status: GNR
Global Status Last Changed: 22Mar1994
Rounded Global Status: GNR - Not Yet Ranked
Nation: United States
National Status: NNA
Nation: Canada
National Status: NNA (31May2012)

U.S. & Canada State/Province Status
United States Alabama (SNA), Arizona (SNA), Arkansas (SNA), Colorado (SNR), Connecticut (SNA), Delaware (SNA), District of Columbia (SNA), Florida (SNA), Georgia (SNR), Hawaii (SNA), Idaho (SNA), Illinois (SNA), Indiana (SNA), Iowa (SNA), Kansas (SNA), Kentucky (SNA), Maine (SNA), Maryland (SNA), Massachusetts (SNR), Michigan (SNA), Minnesota (SNA), Mississippi (SNA), Missouri (SNA), Montana (SNA), Nebraska (SNA), Nevada (SNA), New Hampshire (SNA), New Jersey (SNA), New Mexico (SNA), New York (SNA), North Carolina (SNA), Ohio (SNA), Oklahoma (SNA), Oregon (SNA), Pennsylvania (SNA), Rhode Island (SNA), South Carolina (SNA), South Dakota (SNA), Tennessee (SNA), Texas (SNA), Utah (SNA), Vermont (SNA), Virginia (SNA), Washington (SNA), West Virginia (SNA), Wisconsin (SNA), Wyoming (SNA)
Canada Alberta (SNA), British Columbia (SNA), Manitoba (SNA), New Brunswick (SNA), Newfoundland Island (SNA), Nova Scotia (SNA), Ontario (SNA), Prince Edward Island (SNA), Quebec (SNA)

Other Statuses

NatureServe Global Conservation Status Factors

Other NatureServe Conservation Status Information

Distribution
Help
U.S. States and Canadian Provinces
Color legend for Distribution Map
NOTE: The distribution shown may be incomplete, particularly for some rapidly spreading exotic species.

U.S. & Canada State/Province Distribution
United States ALexotic, ARexotic, AZexotic, CO, CTexotic, DCexotic, DEexotic, FLexotic, GA, HIexotic, IAexotic, IDexotic, ILexotic, INexotic, KSexotic, KYexotic, MA, MDexotic, MEexotic, MIexotic, MNexotic, MOexotic, MSexotic, MTexotic, NCexotic, NEexotic, NHexotic, NJexotic, NMexotic, NVexotic, NYexotic, OHexotic, OKexotic, ORexotic, PAexotic, RIexotic, SCexotic, SDexotic, TNexotic, TXexotic, UTexotic, VAexotic, VTexotic, WAexotic, WIexotic, WVexotic, WYexotic
Canada ABexotic, BCexotic, MBexotic, NBexotic, NFexotic, NSexotic, ONexotic, PEexotic, QCexotic

Range Map
No map available.

Ecology & Life History Not yet assessed
Help
Economic Attributes Not yet assessed
Help
Management Summary Not yet assessed
Help
Population/Occurrence Delineation Not yet assessed
Help
Population/Occurrence Viability
Help
U.S. Invasive Species Impact Rank (I-Rank)
Help
Disclaimer: While I-Rank information is available over NatureServe Explorer, NatureServe is not actively developing or maintaining these data. Species with I-RANKs do not represent a random sample of species exotic in the United States; available assessments may be biased toward those species with higher-than-average impact.

I-Rank: High
Rounded I-Rank: High
I-Rank Reasons Summary: This perennial herb is a nitrogen-fixer, alters the fuel loads in fire-adapted ecosystems, creates dense monospecific stands by strongly outcompeting native plants, and impacts high-quality occurences of common and rare native plant communities in the U.S. It is widespread across the U.S., in every state except California, Louisiana, Alaska and North Dakota. It takes at least 3-5 years to manage an infestation of this species.
Subrank I - Ecological Impact: High
Subrank II - Current Distribution/Abundance: High
Subrank III - Trend in Distribution/Abundance: Medium/Insignificant
Subrank IV - Management Difficulty: Low
I-Rank Review Date: 12Apr2004
Evaluator: Lu, S.
Native anywhere in the U.S?
Native Range: Native to the Mediterranean region of Europs, southwest Asia, and northern Africa (Tu 2003).

Download "An Invasive Species Assessment Protocol: Evaluating Non-Native Plants for their Impact on Biodiversity". (PDF, 1.03MB)
Provide feedback on the information presented in this assessment

Screening Questions

S-1. Established outside cultivation as a non-native? YES
Comments: This species is a non-native that is established outside of cultivation (Kartesz 1999).

S-2. Present in conservation areas or other native species habitat? Yes
Comments: Invades native grassland prairies and dunes (Tu 2003).

Subrank I - Ecological Impact: High

1. Impact on Ecosystem Processes and System-wide Parameters:High/Moderate significance
Comments: Changes the soil nutrients by fixing nitrogen, enriching the soil. Also alters the fuel loads in fire-adapted ecosystems. (Tu 2003)

2. Impact on Ecological Community Structure:High significance
Comments: It can climb over small trees and shrubs, and eventually form large, dense monospecific stands. (Tu 2003)

3. Impact on Ecological Community Composition:High significance
Comments: Can competitively reduce or exclude native vegetation by fully covering and shading the native plants. It can climb over small trees and shrubs, and eventually form large monospecific stands. (Tu 2003)

4. Impact on Individual Native Plant or Animal Species:Insignificant
Comments: No reported impacts.

5. Conservation Significance of the Communities and Native Species Threatened:High significance
Comments: Invades high-quality wildlands, including native grassland prairies and dunes. Impacts the native rare plant Solidago shortii in the southeastern US. Displaces native perennial grasses and forbs in the Tallgrass Prairie system in Iowa. Competes with and excludes native species of the open woodlands in the globally restricted shale barren communities. In the Ottawa Bluffs Preserve in Minnesota, this plant displaces native plants in its intact prairie communities. (Tu 2003)

Subrank II. Current Distribution and Abundance: High

6. Current Range Size in Nation:High significance
Comments: Established outside of cultivation in all states in the US, except for California, North Dakota, Louisiana, and Alaska (Kartesz 1999).

7. Proportion of Current Range Where the Species is Negatively Impacting Biodiversity:Moderate significance
Comments: Invades grasslands and dunes in Missouri, Minnesota, and Illinois. Common in native grassland prairies inthe Tallgrass Prairie in Iowa. Is a pest in both native shale barren communities in the Allegany forest in Pennsylvania, and in the glade/barrens systems and grasslands in the Rolling Fork/Salt River drainage in Kentucky. (Tu 2003).

8. Proportion of Nation's Biogeographic Units Invaded:High significance
Comments: At least in 35 TNC ecoregions (Inference using data from Kartesz 1999 and TNC Ecoregion 2001 map).

9. Diversity of Habitats or Ecological Systems Invaded in Nation:Moderate significance
Comments: Can invade and dominate a variety of vegetation types. Invades high-quality wildlands, including native grassland prairies and dunes. Also invades shale barren communities and glade/barrens systems. Prefers sunny, open areas, found mostly along roadsides, rights-of-way, open fields, waste grounds, and on gravel bars along streams. (Tu 2003)

Subrank III. Trend in Distribution and Abundance: Medium/Insignificant

10. Current Trend in Total Range within Nation:Low significance
Comments: Widely planted since the 1950s across the northern two-thirds of the US mainly for erosion control (Tu 2003). Now in all states in the US, except for California, North Dakota, Louisiana, and Alaska (Kartesz 1999).

11. Proportion of Potential Range Currently Occupied:Insignificant
Comments: Can withstand periods of drought as well as heavy precipitation, but cannot tolerate flooded or anaerobic soil conditions. Can tolerate temperatures down to -33 degrees C, but is intolerant of shade. Cannot tolerate saline and alkaline soils. (Tu 2003)

12. Long-distance Dispersal Potential within Nation:Not ranked

13. Local Range Expansion or Change in Abundance:Not ranked

14. Inherent Ability to Invade Conservation Areas and Other Native Species Habitats:High significance
Comments: Invades natural areas from initial infestations along roadsides, rights-of-way, open fields, waste grounds, and on gravel bars along streams. In the Ottawa Bluffs Preserve in Minnesota, this plant invades intact prairie communities. (Tu 2003)

15. Similar Habitats Invaded Elsewhere:Not ranked

16. Reproductive Characteristics:Moderate significance
Comments: Can spread rapidly by its rhizome growth, is a prolific seeder, (Tu 2003).

Subrank IV. General Management Difficulty: Low

17. General Management Difficulty:Low significance
Comments: Mechanical methods (e.g., pulling, digging, mowing) with follow-up over several years has been successful for the control of this species. Mechanical methods plus herbicides are effective on larger infestations. (Tu 2003)

18. Minimum Time Commitment:Medium/Low significance
Comments: Following initial control treatments, further control efforts and monitoring must be performed at least once a year for a minimum of 3-5 years (Tu 2003).

19. Impacts of Management on Native Species:Medium/Low significance
Comments: Herbicide spraying can be carefully applied to minimize the impact on natives (Tu 2003). However, if this plant covers native plants by climbing and shading, herbicide application on this plant will undoubtedly affect the native plant that it is climbing over.

20. Accessibility of Invaded Areas:Insignificant
Comments: Grassland prairies, dunes, shale barren communities, and glade/barrens systems tend to be pretty accessible areas.
Authors/Contributors
Help

Botanical data developed by NatureServe and its network of natural heritage programs (see Local Programs), The North Carolina Botanical Garden, and other contributors and cooperators (see Sources).

References
Help
  • Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

  • Kartesz, J.T. 1999. A synonymized checklist and atlas with biological attributes for the vascular flora of the United States, Canada, and Greenland. First edition. In: Kartesz, J.T., and C.A. Meacham. Synthesis of the North American Flora, Version 1.0. North Carolina Botanical Garden, Chapel Hill, N.C.

  • Meades, S.J. & Hay, S.G; Brouillet, L. 2000. Annotated Checklist of Vascular Plants of Newfoundland and Labrador. Memorial University Botanical Gardens, St John's NF. 237pp.

  • The Nature Conservancy. 2001. Map: TNC Ecoregions of the United States. Modification of Bailey Ecoregions. Online . Accessed May 2003.

  • Tu, M. 2003. Element stewardship abstract for Coronilla varia, Crown vetch, trailing crown vetch. The Nature Conservancy, Arlington, VA. Available: http://tncweeds.ucdavis.edu/esadocs/documnts/corovar.pdf. (Accessed 2004).

Use Guidelines & Citation

Use Guidelines and Citation

The Small Print: Trademark, Copyright, Citation Guidelines, Restrictions on Use, and Information Disclaimer.

Note: All species and ecological community data presented in NatureServe Explorer at http://explorer.natureserve.org were updated to be current with NatureServe's central databases as of November 2016.
Note: This report was printed on

Trademark Notice: "NatureServe", NatureServe Explorer, The NatureServe logo, and all other names of NatureServe programs referenced herein are trademarks of NatureServe. Any other product or company names mentioned herein are the trademarks of their respective owners.

Copyright Notice: Copyright © 2017 NatureServe, 4600 N. Fairfax Dr., 7th Floor, Arlington Virginia 22203, U.S.A. All Rights Reserved. Each document delivered from this server or web site may contain other proprietary notices and copyright information relating to that document. The following citation should be used in any published materials which reference the web site.

Citation for data on website including State Distribution, Watershed, and Reptile Range maps:
NatureServe. 2017. NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. NatureServe, Arlington, Virginia. Available http://explorer.natureserve.org. (Accessed:

Citation for Bird Range Maps of North America:
Ridgely, R.S., T.F. Allnutt, T. Brooks, D.K. McNicol, D.W. Mehlman, B.E. Young, and J.R. Zook. 2003. Digital Distribution Maps of the Birds of the Western Hemisphere, version 1.0. NatureServe, Arlington, Virginia, USA.

Acknowledgement Statement for Bird Range Maps of North America:
"Data provided by NatureServe in collaboration with Robert Ridgely, James Zook, The Nature Conservancy - Migratory Bird Program, Conservation International - CABS, World Wildlife Fund - US, and Environment Canada - WILDSPACE."

Citation for Mammal Range Maps of North America:
Patterson, B.D., G. Ceballos, W. Sechrest, M.F. Tognelli, T. Brooks, L. Luna, P. Ortega, I. Salazar, and B.E. Young. 2003. Digital Distribution Maps of the Mammals of the Western Hemisphere, version 1.0. NatureServe, Arlington, Virginia, USA.

Acknowledgement Statement for Mammal Range Maps of North America:
"Data provided by NatureServe in collaboration with Bruce Patterson, Wes Sechrest, Marcelo Tognelli, Gerardo Ceballos, The Nature Conservancy-Migratory Bird Program, Conservation International-CABS, World Wildlife Fund-US, and Environment Canada-WILDSPACE."

Citation for Amphibian Range Maps of the Western Hemisphere:
IUCN, Conservation International, and NatureServe. 2004. Global Amphibian Assessment. IUCN, Conservation International, and NatureServe, Washington, DC and Arlington, Virginia, USA.

Acknowledgement Statement for Amphibian Range Maps of the Western Hemisphere:
"Data developed as part of the Global Amphibian Assessment and provided by IUCN-World Conservation Union, Conservation International and NatureServe."

NOTE: Full metadata for the Bird Range Maps of North America is available at:
http://www.natureserve.org/library/birdDistributionmapsmetadatav1.pdf.

Full metadata for the Mammal Range Maps of North America is available at:
http://www.natureserve.org/library/mammalsDistributionmetadatav1.pdf.

Restrictions on Use: Permission to use, copy and distribute documents delivered from this server is hereby granted under the following conditions:
  1. The above copyright notice must appear in all copies;
  2. Any use of the documents available from this server must be for informational purposes only and in no instance for commercial purposes;
  3. Some data may be downloaded to files and altered in format for analytical purposes, however the data should still be referenced using the citation above;
  4. No graphics available from this server can be used, copied or distributed separate from the accompanying text. Any rights not expressly granted herein are reserved by NatureServe. Nothing contained herein shall be construed as conferring by implication, estoppel, or otherwise any license or right under any trademark of NatureServe. No trademark owned by NatureServe may be used in advertising or promotion pertaining to the distribution of documents delivered from this server without specific advance permission from NatureServe. Except as expressly provided above, nothing contained herein shall be construed as conferring any license or right under any NatureServe copyright.
Information Warranty Disclaimer: All documents and related graphics provided by this server and any other documents which are referenced by or linked to this server are provided "as is" without warranty as to the currentness, completeness, or accuracy of any specific data. NatureServe hereby disclaims all warranties and conditions with regard to any documents provided by this server or any other documents which are referenced by or linked to this server, including but not limited to all implied warranties and conditions of merchantibility, fitness for a particular purpose, and non-infringement. NatureServe makes no representations about the suitability of the information delivered from this server or any other documents that are referenced to or linked to this server. In no event shall NatureServe be liable for any special, indirect, incidental, consequential damages, or for damages of any kind arising out of or in connection with the use or performance of information contained in any documents provided by this server or in any other documents which are referenced by or linked to this server, under any theory of liability used. NatureServe may update or make changes to the documents provided by this server at any time without notice; however, NatureServe makes no commitment to update the information contained herein. Since the data in the central databases are continually being updated, it is advisable to refresh data retrieved at least once a year after its receipt. The data provided is for planning, assessment, and informational purposes. Site specific projects or activities should be reviewed for potential environmental impacts with appropriate regulatory agencies. If ground-disturbing activities are proposed on a site, the appropriate state natural heritage program(s) or conservation data center can be contacted for a site-specific review of the project area (see Visit Local Programs).

Feedback Request: NatureServe encourages users to let us know of any errors or significant omissions that you find in the data through (see Contact Us). Your comments will be very valuable in improving the overall quality of our databases for the benefit of all users.