Taxon: Ambrosia tomentosa Nutt.

• Check PlantSearch database of Botanic Gardens Conservation International for possible non-NPGS germplasm.

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 poverty-weed   (Source: State Noxweed Seed ) – English
  
• skeleton-leaf bur-sage   (Source: Intermt F ) – English
  
• ambrósia   (Source: D. Groth, p.c. 2005) – Portuguese (Brazil)
  

Economic importance:

• Vertebrate poisons: mammals   (to livestock fide Kingsbury, as Franseria discolor)
  
• Weed: 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:

• 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.
• Dorn, R. D. 1977. Manual of the vascular plants of Wyoming.
• Dorn, R. D. 1984. Vascular plants of Montana. [= Franseria discolor].
• FNA Editorial Committee. 1993–. Flora of North America.
• Groth, D. 2005. pers. comm. [re. Brazilian common names].
• Harrington, H. 1954. Manual of the plants of Colorado. [= Franseria discolor].
• Kartesz, J. T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland.
• McGregor, R. L. et al. (The Great Plains Flora Association). 1986. Flora of the Great Plains.
• 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.
• Steyermark, J. A. 1977. Flora of Missouri. [= Franseria discolor Nutt.].
• Welsh, S. L. et al. 1987. A Utah flora. Great Basin Naturalist Mem. 9.

More:

Search AGRICOLA article citation database for citations referencing Ambrosia tomentosa.

Search NCBI's Entrez search engine for PubMed citations referencing Ambrosia tomentosa.

Search Biodiversity Heritage Library for historical publications referencing Ambrosia tomentosa.

Synonyms:

• (=) Franseria discolor Nutt.
  

Check other web resources 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
• BONAP: North American Plant Atlas of the Biota of North America Program
• 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.

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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