Taxon: Ambrosia tomentosa Nutt.

Genus: Ambrosia
Family: Asteraceae (alt.Compositae)
Nomen number: 103826
Place of publication: Gen. N. Amer. pl. 2:186. 1818
Link to protologue:
Name Verified on: 29-Oct-2007 by ARS Systematic Botanists. Last Changed: 09-May-2011
Species priority site is:
Accessions: 0 in National Plant Germplasm System

Common names:

Economic Importance:

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

Distributional Range:


  • Northern America

    • North-Central U.S.A.: United States Illinois, Iowa, Kansas, Missouri, Nebraska, North Dakota, South Dakota, Wisconsin
    • Northwestern U.S.A.: United States Colorado, Idaho, Montana, Wyoming
    • South-Central U.S.A.: United States New Mexico, Texas
    • Southwestern U.S.A.: United States Arizona, Utah


  • Cronquist, A. et al. Intermountain flora. (Intermt F)
  • Dorn, R. D. Manual of the vascular plants of Wyoming. 1977 (F Wyom)
  • Dorn, R. D. Vascular plants of Montana. 1984 (F Montana)
  • FNA Editorial Committee Flora of North America. (F NAmer)
  • Groth, D. 2005. pers. comm. (pers. comm.)
  • Harrington, H. Manual of the plants of Colorado. (F Colo)
  • Kartesz, J. T. 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) 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 Division, Agricultural Marketing Service, U.S.D.A. State noxious-weed seed requirements recognized in the administration of the Federal Seed Act (updated annually). (State Noxweed Seed)
  • Steyermark, J. A. Flora of Missouri. (F Missouri)
  • Welsh, S. L. et al. A Utah flora. Great Basin Naturalist Mem. 9. (F Utah)


Check other web resources for Ambrosia tomentosa Nutt. :