Whether you're hosting a lavish affair or a more informal gathering, a cleverly chosen, well-integrated theme adds flair to the occasion. You can use an enduring seasonal symbol -- like the fern -- to create a table that's perfect for easy entertaining. This eye-catching centerpiece, teeming with white lilacs and graceful ferns, is encased in an elegant Georgian pedestal vase. To make a similar arrangement, place balls of floral clay on the bottom of a 1-quart, plastic deli container. Place the container inside a large, glass, cylinder vase, and press the container into the glass, securing the floral clay. Pour water into both sections. Working around the inner container, fill the space with fern clippings, then fill the outer portion with white lilacs. Once you've fashioned your centerpiece and set the table, complete the look with botanically themed napkins, votives, and, of course, an array of potted ferns.