skeletonleaf bursage (Ambrosia tomentosa)
ODA rating: A
Other common names
bur ragweed, silverleaf, povertyweed
Description
Perennial; flowers June to August. Grows 4 to 18 inches tall with extensive creeping rootstocks. Leaves lanceolate, coarsely toothed and deeply lobed. Flowers inconspicuous and yellow. Fruit a light brown bur with spines.
Impacts
Skeletonleaf bursage grows in cultivated fields, pastures and waste areas in several western states and survives under varied soil moisture conditions.
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Images by Oregon Dept. of Agriculture. |
If images are downloaded and used from the ODA web site please be sure to credit the photographer.
Distribution in Oregon
This species is not yet known to occur in Oregon.
Biological controls
Biological control agents are not used on "A" listed weeds in Oregon. If this weed is found it will be managed for eradication.
Informational Links
WeedMapper
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