This image may better illustrate the sprawling tangled nature of dwarf horsetail. One of the classic Boy Scout lessons is using horsetails, also called scouring rushes, to clean dishes and pans on camping trips. Once I saw this species, that made more sense than ever before. But that's because of another preconception. In our troop, Scouts came equipped with Brillo pads. A steel wool image of what scouring should look like. In any case, I have to say even the larger tougher stems of other horsetails don't actually work very well on pans. Unless you add sand. And then maybe you don't need the rushes!