Robert W. Freckmann Herbarium

  Ambrosia tomentosa Nutt. image
Photographer: from USDA Plants website           

Botancial Illustration
Family Asteraceae
Ambrosia tomentosa Nutt.
bur ragweed, skeleton-leaf bur ragweed, skeleton-leaf bur-sage
Ambrosia: Greek for "food of the gods"
tomentosa: densely woolly
County distribution map- click for detailed distribution maps.
Detailed Distribution:
Town Range Maps
Google Dot Maps
Status: Introduced - adventive
Plant: erect, perennial forb with many branches; creeping, colony forming roots
Flower: inflorescence of many, small, gree, bead-like heads on spikes; blooms May-Aug.
Fruit:not on fluffy pappus
Leaf:mostly alternate, white hairs below, 2-3 times pinnately-divided

More Information Natural Communities Herbarium Specimens
All Ambrosia list Ethnobotany Information Google- Images or Text

Flora of North America (off site)
Franseria discolor Nutt.

Botany News/Events
Book We Recommend
Historical Botanists
Other Links
Botanical Club of Wisconsin (off site)
UW-Stevens Point Biology Dept.
Plants of Wisconsin
Vascular Plants
Natural Communities
Botany News/Events
Other Links
Lichens (off site)   
Tom Volk's Fungi (off site)
Taxonomy of Vascular Plants
                          Vascular Plants
Browse by Identification Guides
Family Wildflowers
Genus Trees
Common Names Shrubs
Search by Vines
Names Aquatic-Semi aquatic
Specimens Ferns - Fern Allies
Blooming Times Grasses, Sedges, or Rushes
County & Status Other Resources  
Town Range Taxonomy of Vascular Plants
  WI Checklist & CofC Values
Browse by:
Common Name
Search by:
Copyright 2012 Permissions Contact Us Web Map