Silver burweed (Ambrosia chamissonis)

Silver burweed (Ambrosia chamissonis)

Location: The coastline of western North America from Alaska to Baja California. Silver Burweed (Ambrosia chamissonis) Description:   Ambrosia chamissonis is a large, sprawling perennial herb exceeding 3 metres (9.8 ft) in maximum width. The stems are roughly or...