Part of what is the most fun with C. album is getting someone else to realize they know it. It goes by so many common names that it can hide in plain sight. For example:
Lambsquarters and goosefoot. The USDA plants list calls Chenopodium album lambsquarters. But it calls many other species of Chenopodium goosefoot (goosefoots), and many people in the United States definitely call C. album goosefoot.