Equisetum growing in the dampness parallel to a creek in Oregon. The new and the old form a bouquet growing out of the rocks.  I found it an interesting plant but since reading more about it, it seems to be a noxious and invasive weed, almost impossible to kill, deadly to livestock, and will take over a landscape in a New York minute.  Beware!  These were only about 12 inches tall.  I actually brought one interesting stalk home with me…but having read what I read, I discarded it!