Ambrosia tomentosa

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Ambrosia tomentosa
Skeletonleaf bur ragweed
Scientific classification edit
Kingdom: Plantae
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Ambrosia
A. tomentosa
Binomial name
Ambrosia tomentosa
  • Franseria discolor Nutt.
  • Franseria exigua Wawra
  • Gaertneria discolor (Nutt.) Kuntze
  • Gaertneria tomentosa (Nutt.) Heller
  • Gaertneria tomentosa (Nutt.) A.Nelson
  • Xanthidium discolor (Nutt.) Delpino
  • Franseria tomentosa (Nutt.) A.Nelson, not A. Gray

Ambrosia tomentosa, the skeletonleaf bur ragweed,[2] silverleaf povertyweed, or skeleton-leaf bursage,[3][4][5] is a North American species of perennial plants in the (aster family).[6]

Skeletonleaf bur ragweed is native to the west-central part of the United States, primarily the western Great Plains, the Colorado Plateau, and eastern Great Basin.[7][8]

It is considered a noxious weed in several states.[5][9][10]


Ambrosia tomentos grows up to 3 feet (91 cm) tall. The deeply lobed hairy leaves grow to 5 inches (12.7 cm) and have toothed margins. Flowers are small and yellow and produce spined 2-seeded burrs. In addition to seeds it can also reproduce via its widely spreading roots.[11][6]


  1. ^ The Plant List Ambrosia tomentosa Nutt.
  2. ^ Eastern Colorado Wildflowers, Ambrosia tomentosa (Skeletonleaf Burr Ragweed or Skeletonleaf Bursage)
  3. ^ Center for Invasive Species and Ecosystem Health, skeletonleaf bursage Ambrosia tomentosa Nutt.
  4. ^ Oregon State University, StreamWebs, Skeletonleaf bursage (Ambrosia tomentosa)
  5. ^ a b "Ambrosia tomentosa". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 2010-03-25.
  6. ^ a b Flora of North America Vol. 21 Page 17 Ambrosia tomentosa Nuttall, Gen. N. Amer. Pl. 2: 186. 1818.
  7. ^ United States Department of Agriculture plants profile accessed 2.14.2013
  8. ^ Biota of North America Program 2014 county distribution map
  9. ^ University of Wyoming, Department of Ecosystem Science & Management, Skeletonleaf Bursage, Ambrosia tomentosa
  10. ^ "Washington State Noxious Weed Control Board, skeleton-leaf bursage, Ambrosia tomentosa". Archived from the original on 2015-03-16. Retrieved 2015-05-17.
  11. ^ Idaho's Noxious Weeds – Skeletonleaf Bursage Retrieved 2010-03-25.

External links[edit]