Equisetum (horsetail reed) is an ancient living genus in Equisetaceae, a family of vascular plants that reproduce by spores rather than seeds. (Wiki). They are spectacular living fossils!
These horsetail reeds were harvested from the shores of a nearby abandoned quarry. Recently I ordered Equisetum giganteum 'El Tabacal' (Giant Horsetail) from Plant Delights, hoping I can get them to grow in Wisconsin. Pressed giant horsetail reeds would make an impressive piece of botanical art!