Silver burr ragweed
Ambrosia chamissonis
''Ambrosia chamissonis'' is a species of ragweed known by the common names silver burr ragweed, silver beachweed and beach bur.
It is known from most of the coastline of western North America from Alaska to Baja California, where it is a resident of beaches and other sandy coastal habitats.
It is known from most of the coastline of western North America from Alaska to Baja California, where it is a resident of beaches and other sandy coastal habitats.