International citizens

The much maligned dandelion must come from somewhere… Taraxacum officinale is the most international citizen, the greatest transgressor of borders, (which we know are abstract and arbitrary) and so I seek them in the thick uncut grass on the street verges and in the unkempt front gardens and parks. When I see the bright yellow flowers, the spherical seed heads swaying in the breeze I am greeting an old friend. Should I pick some leaves to add to the salad? Or should I let them be? The swift slice of the lawn mower only causes them to duck down. They will return next season or perhaps before!