Taxon: Ambrosia tomentosa Nutt.

A declared aquatic or terrestrial noxious weed and/or noxious-weed seed in these U.S. states (see state noxious weed lists), with links to state information or web documents:

CO°, CO(as Franseria discolor)°, ID*°, KS(as Franseria discolor)*, NE°, NE(as Franseria discolor)°, NM(as Franseria discolor)°, OR*, WY°.

ªAquatic.

*Terrestrial.

°In seed.

Link to noxious weed information from

Common names:

• silverleaf povertyweed   (Source: State Noxweed Seed ) – English
  
• skeleton-leaf bursage   (Source: Intermt F ) – English
  
• ambrósia   (Source: D. Groth, p.c. 2005) – Portuguese (Brazil)
  
• artemisia   (Source: D. Groth, p.c. 2005) – Portuguese (Brazil)
  

Economic importance:

• Vertebrate poisons: mammals   (to livestock fide Kingsbury, as Franseria discolor)
  
• Weed: also potential seed contaminant   (fide State Noxweed Seed)
  

More:

View toxicology references for Ambrosia tomentosa from FDA Poisonous Plant Database

View ethnobotanical data from Moerman's Native American Ethnobotany Database

Distributional range:

      Native: (links to other web resources are provided for some distributions)

• NORTHERN AMERICA (Check conservation status in U.S. & Canada in NatureServe Explorer database)
  North-Central U.S.A.: United States - Illinois, Iowa, Kansas, Missouri, Nebraska [w.], North Dakota, South Dakota [s.w.], Wisconsin
  Northwestern U.S.A.: United States - Colorado, Idaho [s.], Montana, Wyoming
  South-Central U.S.A.: United States - New Mexico, Texas
  Southwestern U.S.A.: United States - Arizona [n. & c.], Utah

References:

• Cronquist, A. et al. 1972–. Intermountain flora. (Intermt F)
• Dorn, R. D. 1977. Manual of the vascular plants of Wyoming. (F Wyom)
• Dorn, R. D. 1984. Vascular plants of Montana. (F Montana) [= Franseria discolor].
• FNA Editorial Committee. 1993–. Flora of North America. (F NAmer)
• Groth, D. 2005. pers. comm. [re. Brazilian common names].
• Harrington, H. 1954. Manual of the plants of Colorado. (F Colo) [= Franseria discolor].
• Kartesz, J. T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. (L US Can ed2)
• McGregor, R. L. et al. (The Great Plains Flora Association). 1986. Flora of the Great Plains. (F GPlains)
• Payne, W. W. 1964. A re-evaluation of the genus Ambrosia (Compositae). J. Arnold Arbor. 45:427.
• Seed Regulatory and Testing Branch, Agricultural Marketing Service, U.S.D.A. 1999. State noxious-weed seed requirements recognized in the administration of the Federal Seed Act. (State Noxweed Seed)
• Steyermark, J. A. 1977. Flora of Missouri. (F Missouri) [= Franseria discolor Nutt.].
• Welsh, S. L. et al. 1987. A Utah flora. Great Basin Naturalist Mem. 9. (F Utah)

More:

Search AGRICOLA article citation database for citations referencing Ambrosia tomentosa.

Search NCBI's Entrez search engine for PubMed citations referencing Ambrosia tomentosa. Note: Defaults to a search by genus or species epithet if species binomial not found.

Synonyms:

• (=) Franseria discolor Nutt.
  

Check other databases for Ambrosia tomentosa Nutt.:

• Flora of North America: Collaborative Floristic Effort of North American Botanists
• PLANTS: USDA-NRCS Database of Plants of the United States and its Territories
• TROPICOS: Nomenclatural and Specimen Database of the Missouri Botanical Garden
• ePIC: Electronic Plant Information Centre of Royal Botanic Gardens, Kew
• AGRICOLA: Article Citation Database or NAL Catalog of USDA's National Agricultural Library
• Entrez: NCBI's search engine for PubMed citations, GenBank sequences, etc.
  Note: Defaults to a search by genus or species epithet if species binomial not found.

Images:

• Fruits: U.S. National Seed Herbarium image

More:

• Check PlantSystematics.org for additional images
• Images Note: Be advised that their identity may be inaccurate. Proper identification of a plant may require specialized taxonomic knowledge or comparison with properly documented herbarium material.

Abbreviations & symbols in GRIN Taxonomy

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| USDA | ARS | GRIN | NPGS | New Search |

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Cite as:
USDA, ARS, National Genetic Resources Program.
Germplasm Resources Information Network - (GRIN) [Online Database].
National Germplasm Resources Laboratory, Beltsville, Maryland.
URL: http://www.ars-grin.gov/cgi-bin/npgs/html/taxon.pl?103826 (09 February 2010)

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