This is another modern development from a single-flowered Mexican species. Indeed, the development of the new decorative types has come about in our day. The newer types are less rounded than the old forms, and show the loose, free, chrysanthemum style of flower. In the dry, warm, summer air of the prairie States these newer forms are at home, and, indeed, they do well over a large part of the Union. In rich, warm soil in a sheltered position the dahlia gives little trouble, and does not need staking. In autumn at the West the first freeze not only kills the top, but often the buds at the crowns of the tubers. To prevent this it is best to mulch the surface of the bed late in the season. The tubers can be stored dry in a closet of the house where sweet potatoes can be kept. They can also be kept well in a furnace-heated cellar on shelves, singly, as when closely packed they are liable to mould. If they dry too much they should be removed to a more distant part of the cellar, keeping in mind the fact that it freezes when a potato would not be harmed, and that the dampness of a common cellar is almost certain to start mould and rotting.