Malva parviflora - L.
Small Whorled Cheeseweed
Other English Common Names: Cheeseweed Mallow
Other Common Names: cheeseweed mallow
Taxonomic Status: Accepted
Related ITIS Name(s): Malva parviflora L. (TSN 21838)
Unique Identifier: ELEMENT_GLOBAL.2.133981
Element Code: PDMAL0R060
Informal Taxonomy: Plants, Vascular - Flowering Plants - Mallow Family
 
Kingdom Phylum Class Order Family Genus
Plantae Anthophyta Dicotyledoneae Malvales Malvaceae Malva
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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: Malva parviflora
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), California (SNA), Colorado (SNA), Florida (SNA), Hawaii (SNA), Idaho (SNA), Iowa (SNA), Kansas (SNA), Louisiana (SNA), Maryland (SNA), Massachusetts (SNR), Missouri (SNA), Montana (SNA), Nebraska (SNA), Nevada (SNA), New Jersey (SNA), New Mexico (SNA), New York (SNA), North Dakota (SNA), Oregon (SNA), Texas (SNA), Washington (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 AZexotic, CAexotic, COexotic, FLexotic, HIexotic, IAexotic, IDexotic, KSexotic, LAexotic, MA, MDexotic, MOexotic, MTexotic, NDexotic, NEexotic, NJexotic, NMexotic, NVexotic, NYexotic, ORexotic, TXexotic, WAexotic, 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: Medium/Insignificant
Rounded I-Rank: Unknown
I-Rank Reasons Summary: A common weed on roadsides and wasteplaces, there appears to be little negative effect in natural areas.
Subrank I - Ecological Impact: Low/Insignificant
Subrank II - Current Distribution/Abundance: Medium
Subrank III - Trend in Distribution/Abundance: Medium/Insignificant
Subrank IV - Management Difficulty: Medium/Insignificant
I-Rank Review Date: 19May2004
Evaluator: Fellows, M.
Native anywhere in the U.S?
Native Range: Mediterranean region, Asia Minor and India (GRIN 2001; PIER 2003).

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: (Kartesz 1999).

S-2. Present in conservation areas or other native species habitat? Yes
Comments: In HI, primarily in disturbed areas (PIER 2003). In CA, common in disturbed places (Baldwin et al. 2004).

Subrank I - Ecological Impact: Low/Insignificant

1. Impact on Ecosystem Processes and System-wide Parameters:Low significance/Insignificant
Comments: No ecosystem effects have been reported, therefore a low or insignificant rank inferred.

2. Impact on Ecological Community Structure:Medium significance/Insignificant
Comments: Herbaceous (Baldwin et al. 2004).

3. Impact on Ecological Community Composition:Unknown

4. Impact on Individual Native Plant or Animal Species:Unknown

5. Conservation Significance of the Communities and Native Species Threatened:Insignificant
Comments: In HI, primarily in disturbed areas (PIER 2003). In CA, common in disturbed places (Baldwin et al. 2004). Found on roadsides in Texas (Texas A&M 2000).

Subrank II. Current Distribution and Abundance: Medium

6. Current Range Size in Nation:High significance
Comments: Distribution includes most of states west of Mississippi, except Utah, Oklahoma and South Dakota. Also present in East, Florida, South Carolina, New York and southern New England. (Kartesz 1999).

7. Proportion of Current Range Where the Species is Negatively Impacting Biodiversity:Low significance/Insignificant
Comments: Inferred - most commonly inhabits roadsides and wasteplaces.

8. Proportion of Nation's Biogeographic Units Invaded:High significance
Comments: Distribution includes most of states west of Mississippi, except Utah, Oklahoma and South Dakota. Also present in East, Florida, South Carolina, New York and southern New England. (Kartesz 1999). This distribution overlaps more than half of the ecoregions in the continental U.S. (TNC 2001).

9. Diversity of Habitats or Ecological Systems Invaded in Nation:Low significance
Comments: In HI, primarily in disturbed areas (PIER 2003). In CA, common in disturbed places (Baldwin et al. 2004). Found on roadsides in Texas (Texas A&M 2000).

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

10. Current Trend in Total Range within Nation:Medium/Low significance
Comments: Primarily found in disturbed places, inferred to be expanding slowly or moderately.

11. Proportion of Potential Range Currently Occupied:Low significance/Insignificant
Comments: Inferred from current distribution (Kartesz 1999).

12. Long-distance Dispersal Potential within Nation:Unknown

13. Local Range Expansion or Change in Abundance:Medium/Low significance
Comments: Plant is inbreeding, therefore one plant can infest a local area (Michael et al. 2003).

14. Inherent Ability to Invade Conservation Areas and Other Native Species Habitats:Low significance
Comments: In HI, primarily in disturbed areas (PIER 2003). In CA, common in disturbed places (Baldwin et al. 2004). Found on roadsides in Texas (Texas A&M 2000).

15. Similar Habitats Invaded Elsewhere:High/Low significance
Comments: Canada (Kartesz 1999). Pacific Islands: New Caledonia, Palau (PIER 2003). Western Australia (Michael et al. 2003). Also in southern Africa and New Zealand (Wilken and Hannah 1998).

16. Reproductive Characteristics:Low significance/Insignificant
Comments: Seed (PIER 2003). Most mallows have a seed bank, and some can be very long-lived (Michael et al. 2003). Seed maturation can occur in as little as 64 days post germination (Michael et al. 2003).

Subrank IV. General Management Difficulty: Medium/Insignificant

17. General Management Difficulty:Low significance
Comments: Inferred from management of Malva neglecta, a similar species in similar habitat: Increasing turf grass density may decrease ability of Malva neglecta to compete (Sedbrook 2004). Pre-emergent herbicides, as post-emergent herbicides are not very effective (Sedbrook 2004). Hoe or pull out young plants (Sedbrook 2004).

18. Minimum Time Commitment:High/Low significance
Comments: Most mallows have a seed bank, and some can be very long-lived (Michael et al. 2003).

19. Impacts of Management on Native Species:Low significance/Insignificant
Comments: Inferrred to be low because habitat Malva parvilora is primarily found in already has lots of disturbance.

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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  • Baldwin, B.G., S. Boyd, B.J. Ertter, D.J. Keil, R.W. Patterson, T.J. Rosatti and D.H. Wilken. 2004.
    Jepson Flora Project, Jepson Online Interchange for California Floristics. Regents of the University of California, Berkeley. Online. Available: http://ucjeps.berkeley.edu/jepson_flora_project.html (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.

  • 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.

  • Michael, P.J., K.J. Steadman and J.A. Plummer. 2003. The agro-ecology of Malva parviflora (small-flowered mallow). Agribusiness Crop Updates. Western Australia Herbicide Resistance Initative, School of Plant Biology, University of Western Australia. Available ONLINE: http://agspsrv38.agric.wa.gov.au/pls/portal30/docs/folder/ikmp/pw/weed/decp/W_MichaelSteadman.pdf. Accessed 23 Mar 04.

  • Pacific Island Ecosystems at Risk Project (PIER). 2003. Plant threats to Pacific ecosystems - species of environmental concern. Last updated 20 December 2003. Online. Available: http://www.hear.org/pier/threats.htm. (Accessed 2004).

  • Sedbrook, J. 2004. CSU/Denver County Cooperative Extension Master Gardener 1999-2004. Common Mallow. Malva neglecta. Available ONLINE http://www.colostate.edu/Depts/CoopExt/4DMG/Weed/mallow.htm. Accessed 23 MARCH 2004.

  • Texas A&M University. 2000. Uvalde Research and Extension Center, Texas A&M University System. Available ONLINE http://uvalde.tamu.edu/herbarium/ (accessed 2004).

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

  • USDA, ARS, National Genetic Resources Program. 2001. Germplasm Resources Information Network - (GRIN). [Online Database]. National Germplasm Resources Laboratory, Beltsville, Maryland.URL: http://www.ars-grin.gov/var/apache/cgi-bin/npgs/html/taxon.pl?6438. (Accessed 2004)

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