Lepidium perfoliatum - L.
Clasping Pepper-grass
Other English Common Names: Clasping Pepperweed
Other Common Names: clasping pepperweed
Taxonomic Status: Accepted
Related ITIS Name(s): Lepidium perfoliatum L. (TSN 22974)
Unique Identifier: ELEMENT_GLOBAL.2.141130
Element Code: PDBRA1M0R0
Informal Taxonomy: Plants, Vascular - Flowering Plants - Mustard Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Capparales Brassicaceae Lepidium
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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: Lepidium perfoliatum
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 (13Oct2016)

U.S. & Canada State/Province Status
United States Arizona (SNA), Arkansas (SNA), California (SNA), Colorado (SNA), Connecticut (SNA), Georgia (SNR), Idaho (SNA), Illinois (SNA), Iowa (SNA), Kansas (SNA), Kentucky (SNA), Maine (SNA), Maryland (SNA), Massachusetts (SNR), Michigan (SNA), Mississippi (SNA), Missouri (SNA), Montana (SNA), Nebraska (SNA), Nevada (SNA), New Mexico (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), Utah (SNA), Virginia (SNA), Washington (SNA), West Virginia (SNA), Wisconsin (SNA), Wyoming (SNA)
Canada Alberta (SNA), British Columbia (SNA), Ontario (SNA), Quebec (SNA), Saskatchewan (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 ARexotic, AZexotic, CAexotic, COexotic, CTexotic, GA, IAexotic, IDexotic, ILexotic, KSexotic, KYexotic, MA, MDexotic, MEexotic, MIexotic, MOexotic, MSexotic, MTexotic, NCexotic, NDexotic, NEexotic, NMexotic, NVexotic, OHexotic, OKexotic, ORexotic, PAexotic, RIexotic, SCexotic, SDexotic, TNexotic, UTexotic, VAexotic, WAexotic, WIexotic, WVexotic, WYexotic
Canada ABexotic, BCexotic, ONexotic, QCexotic, SKexotic

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: Low/Insignificant
Rounded I-Rank: Low
I-Rank Reasons Summary: This species has a very widespread but scattered distribution within the U.S. It is mostly a weed of cultivated fields, pastures, waste places and roadsides in the West, but also invasive in dry prairies and shrub-steppe where some disturbance has occurred. In the latter situations, this species could have a moderate effect on native biodiversity.
Subrank I - Ecological Impact: Insignificant
Subrank II - Current Distribution/Abundance: High/Medium
Subrank III - Trend in Distribution/Abundance: Low/Insignificant
Subrank IV - Management Difficulty: Medium/Insignificant
I-Rank Review Date: 03Feb2004
Evaluator: Maybury, K.
Native anywhere in the U.S?
Native Range: Eurasia

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

S-2. Present in conservation areas or other native species habitat? Yes

Subrank I - Ecological Impact: Insignificant

1. Impact on Ecosystem Processes and System-wide Parameters:Insignificant

2. Impact on Ecological Community Structure:Insignificant
Comments: Herbaceous and usually noted as being scattered and local.

3. Impact on Ecological Community Composition:Low significance/Insignificant
Comments: Not a good competitor and does not tend to form thick stands (Southwest Exotic Pest Plant Information Clearinghouse, not dated) except in highly disturbed areas.

4. Impact on Individual Native Plant or Animal Species:Low significance/Insignificant
Comments: Grand Canyon National Park reports no invasion of native plant communities (Southwest Exotic Pest Plant Informatin Clearinghouse, not dated).

5. Conservation Significance of the Communities and Native Species Threatened:Moderate significance
Comments: Usually found in waste places but this species was listed as one of five non-native plants commonly found with Lepidium papilliferum, a Listed Endangered plant of sagebrush-steppe habitats in Idaho (Wood and Brown 2002). One of the factors threatening L. papilliferum is invasion by non-native plants, especially where livestock are distubing the soil (Wood and Brown 2002). Grand Canyon National Park reports no invasion of native plant communities (Southwest Exotic Pest Plant Informatin Clearinghouse, not dated).

Subrank II. Current Distribution and Abundance: High/Medium

6. Current Range Size in Nation:High significance
Comments: Most of the lower 48 and Alaska, but most abundant in the Great Plains (Rutledge and McLendon, not dated).

7. Proportion of Current Range Where the Species is Negatively Impacting Biodiversity:Medium/Low significance

8. Proportion of Nation's Biogeographic Units Invaded:High significance

9. Diversity of Habitats or Ecological Systems Invaded in Nation:High significance
Comments: Disturbed sites in creosote bush, shadscale, greasewood, galleta, pinyon juniper, and sagebrush communities (Rutledge and McLendon, not dated).

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

10. Current Trend in Total Range within Nation:Medium/Low significance
Comments: Not expanding greatly or decreasing.

11. Proportion of Potential Range Currently Occupied:Insignificant
Comments: Already extremely widespread.

12. Long-distance Dispersal Potential within Nation:Low significance
Comments: Little potential for long-distance dispersal (Southwest Exotic Plant Infromation Clearinghouse, not dated).

13. Local Range Expansion or Change in Abundance:Medium significance/Insignificant
Comments: Unknown, but almost certainly not increasing rapidly.

14. Inherent Ability to Invade Conservation Areas and Other Native Species Habitats:Low significance
Comments: Early seral, disturbance-dependent.

15. Similar Habitats Invaded Elsewhere:Low significance
Comments: Occasionally collected in Western Australia but it is doubtful that this species has naturalised there (Hussey et al. 1997).

16. Reproductive Characteristics:Low significance
Comments: Seeds remain viable in the soil for up to five years; seed production is moderate; does not resprout (Southwest Exotic Pest Plant Information Clearinghouse, not dated). Seeds are long-lived in cultivated soils (Rutledge and McLendon, not dated).

Subrank IV. General Management Difficulty: Medium/Insignificant

17. General Management Difficulty:Unknown

18. Minimum Time Commitment:Unknown

19. Impacts of Management on Native Species:Insignificant

20. Accessibility of Invaded Areas:Unknown
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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  • Hussey, B. M. J., G.J. Keighery, R.D. Cousens, J. Dodd & S.G. Lloyd. 1997. Western weeds: a guide to the weeds of western Australia. The Plant Protection Society of Western Australia. Available online: http://members.iinet.net.au/~weeds/pps_publications.htm. (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.

  • Rutledge, C.R. and T. McLendon. 1996. An assessment of exotic plant species of Rocky Mountain National Park. Department of Rangeland Ecosystem Science, Colorado State University. 97 pp. Online: http://www.npwrc.usgs.gov/resource/plants/explant/summinfo.htm

  • Southwest Exotic Pest Plant Information Clearinghouse. Not dated. Weed Species. Available at: http://www.usgs.nau.edu/SWEPIC/asp/swemp/species.asp. (Accessed 2004).

  • Wood, J. and B. Brown. 2002. Listing the Plant Lepidium papilliferum (slickspot peppergrass) as Endangered. Federal Register 67(135): 46441-46450.

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