Buffalobur
Solanum rostratum

This Class A noxious weed has a very limited distribution in Washington. Although it is native to the midwestern United States, it is widely introduced elsewhere.  It has been introduced to the Pacific Northwest multiple times, often as a seed contaminant in flowers, vegetables and even birdseed.  It can spread quickly by seed and is able to grow in a wide range of conditions.  The burs are a serious nuisance to wool producers even in the plant's native range and this spiny plant can be a real pest on a farm or in range areas.

For more information about buffalobur, please see the buffalobur information from the Washington State Noxious Weed Control Board.

If you find buffalobur in King County, please notify us through our online infestation form.

To find out where we have records of this weed in King County, use our interactive noxious weed map and search for buffalobur.

Buffalobur photos - click thumbnail for larger image