Capsella bursa-pastoris - (L.) Medik.
Common Shepherd's Purse
Other Common Names: shepherd's purse
Taxonomic Status: Accepted
Related ITIS Name(s): Capsella bursa-pastoris (L.) Medik. (TSN 22766)
French Common Names: bourse--pasteur
Unique Identifier: ELEMENT_GLOBAL.2.155221
Element Code: PDBRA0J010
Informal Taxonomy: Plants, Vascular - Flowering Plants - Mustard Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Capparales Brassicaceae Capsella
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Concept Reference
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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: Capsella bursa-pastoris
Conservation Status
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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 (07Sep2016)

U.S. & Canada State/Province Status
United States Alabama (SNA), Alaska (SNA), Arizona (SNA), Arkansas (SNA), California (SNA), Colorado (SNA), 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), Louisiana (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), North Dakota (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), Labrador (SNA), Manitoba (SNA), New Brunswick (SNA), Newfoundland Island (SNA), Northwest Territories (SNA), Nova Scotia (SNA), Nunavut (SNA), Ontario (SNA), Prince Edward Island (SNA), Quebec (SNA), Saskatchewan (SNA), Yukon Territory (SNA)

Other Statuses

NatureServe Global Conservation Status Factors

Other NatureServe Conservation Status Information

Distribution
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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 AKexotic, ALexotic, ARexotic, AZexotic, CAexotic, COexotic, CTexotic, DCexotic, DEexotic, FLexotic, GA, HIexotic, IAexotic, IDexotic, ILexotic, INexotic, KSexotic, KYexotic, LAexotic, MA, MDexotic, MEexotic, MIexotic, MNexotic, MOexotic, MSexotic, MTexotic, NCexotic, NDexotic, 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, LBexotic, MBexotic, NBexotic, NFexotic, NSexotic, NTexotic, NUexotic, ONexotic, PEexotic, QCexotic, SKexotic, YTexotic

Range Map
No map available.

Ecology & Life History Not yet assessed
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Economic Attributes Not yet assessed
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Management Summary Not yet assessed
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Population/Occurrence Delineation Not yet assessed
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Population/Occurrence Viability
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U.S. Invasive Species Impact Rank (I-Rank)
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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: Insignificant
Rounded I-Rank: Insignificant
I-Rank Reasons Summary: This plant is mostly a problem in disturbed areas and only rarely occurs in conservation areas.
Subrank I - Ecological Impact: Insignificant
Subrank II - Current Distribution/Abundance: Medium
Subrank III - Trend in Distribution/Abundance: Medium/Insignificant
Subrank IV - Management Difficulty: High/Low
I-Rank Review Date: 20Jan2004
Evaluator: Lu, S.
Native anywhere in the U.S?
Native Range: Native to Europe (Parker 1972).

Download "An Invasive Species Assessment Protocol: Evaluating Non-Native Plants for their Impact on Biodiversity". (PDF, 1.03MB)
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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: Reported as invasive in AZ, CA, HI, NV, UT, VA, specifically in Death Valley National Park (California), Glen Canyon National Recreation Area (Utah), Haleakala National Park (Hawaii), Lake Mead National Park (Nevada), and Shenandoah National Park (Virginia) (PCA 2003).

Subrank I - Ecological Impact: Insignificant

1. Impact on Ecosystem Processes and System-wide Parameters:Insignificant
Comments: No reported impacts.

2. Impact on Ecological Community Structure:Insignificant
Comments: No reported impacts.

3. Impact on Ecological Community Composition:Insignificant
Comments: No reported impacts.

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

5. Conservation Significance of the Communities and Native Species Threatened:Insignificant
Comments: No reported impacts.

Subrank II. Current Distribution and Abundance: Medium

6. Current Range Size in Nation:High significance
Comments: Established in all 50 states and DC (Kartesz 1999).

7. Proportion of Current Range Where the Species is Negatively Impacting Biodiversity:Low significance
Comments: Reported as invasive in AZ, CA, HI, NV, UT, VA, specifically in Death Valley National Park (California), Glen Canyon National Recreation Area (Utah), Haleakala National Park (Hawaii), Lake Mead National Park (Nevada), and Shenandoah National Park (Virginia) (PCA 2003). Also listed as a noxious weed in Colorado (PLANTS, no date).

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

9. Diversity of Habitats or Ecological Systems Invaded in Nation:Insignificant
Comments: This plant is characterized by success in almost all man-made habitats (Linde et al. 2000) and is mostly found in gardens, footpaths, cultivated land, and bare ground (Parker 1972; RNZIH, no date; Harrington 2004). In Hawaii, this plant is found in disturbed and often dry sites, especially pastures (Wagner et al. 1990).

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

10. Current Trend in Total Range within Nation:Medium/Low significance
Comments: Already in all 50 states (Kartesz 1999). This plant was introduced from Europe to North America after the 15th century. (Linde et al. 2000)

11. Proportion of Potential Range Currently Occupied:Insignificant
Comments: Already in all 50 states (Kartesz 1999).

12. Long-distance Dispersal Potential within Nation:Unknown

13. Local Range Expansion or Change in Abundance:Unknown

14. Inherent Ability to Invade Conservation Areas and Other Native Species Habitats:Insignificant
Comments: This plant is characterized by strong colonizing ability due to the fine-scaled ecotypic differentiation in flowering (Linde et al. 2000). However, this plant is mostly found in gardens, footpaths, cultivated land, and bare ground (Parker 1972; RNZIH, no date; Harrington 2004).

15. Similar Habitats Invaded Elsewhere:High/Low significance
Comments: This plant has a worldwide distribution, avoiding only the hot and wet tropics (Linde et al. 2000). Also in Canada (Kartesz 1999). Very common in cultivated soil everywhere in New Zealand (RNZIH, no date).

16. Reproductive Characteristics:Moderate significance
Comments: In Arizona and New Zealand, this plant can germinate and grow at any time of the year if moisture is adequate (Parker 1972; RNZIH, no date; Harrington 2004). Reproduces only by seed (Parker 1972) but each plant can produce over 33,000 seeds (Cranston et al. 2002). This plant is predominantly self-pollinated (Linde et al. 2000).

Subrank IV. General Management Difficulty: High/Low

17. General Management Difficulty:Low significance
Comments: This plant has a deep tap root (RNZIH, no date). It is quite resistant to many selective herbicides but can be successfully and easily controlled using non-selective herbicides (Harrington 2004).

18. Minimum Time Commitment:Unknown

19. Impacts of Management on Native Species:High/Moderate significance
Comments: This plant can be successfully and easily controlled using non-selective herbicides (Harrington 2004).

20. Accessibility of Invaded Areas:Unknown

Other Considerations: The European gene pool was introduced without major genetic changes (Linde et al. 2000).
Authors/Contributors
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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
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  • Cranston, R., D. Ralph, and B. Wikeem. 2002. Field guide to noxious and other selected weeds of British Columbia - fourth edition. Available: http://www.agf.gov.bc.ca/cropprot/weedguid/weedguid.htm. (Accessed 2004).

  • Harrington, K. 2004. New Zealand weed database. University of Massey, Institute of Natural Resources. Available: http://weeds.massey.ac.nz/database.asp. (Accessed 2004).

  • 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.

  • Linde, M., S. Diel, and B. Neuffer. 2001. Flowering ecotypes of Capsella bursa-pastoris (L.) Medik. Brassicaceae analysed by a congregation of phenotypic characters (QTL) and molecular markers. Annals of Botany 87: 91-99. Available: http://aob.oupjournals.org/cgi/reprint/87/1/91.pdf. (Accessed 2004).

  • 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.

  • Parker, K. F. 1972. An illustrated guide to Arizona weeds. The University of Arizona Press, Tucson, AZ. [http://www.uapress.arizona.edu/onlinebks/weeds/titlweed.htm]

  • Royal New Zealand Institute of Horticulture. No date. An illustrated guide to common weeds of new zealand. Available: http://www.rnzih.org.nz/. (Accessed 2004).

  • USDA, NRCS. 2002. The PLANTS Database, Version 3.5 (http://plants.usda.gov). National Plants Database Center, Baton Rouge, LA 70874-4490 USA.

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