The Palmer Fern Dell     The Eugenia Leftwich Palmer Fern Dell, designed by Naud Burnett, is an enchanting mini-garden located within the Jonsson Color Garden. More than 90 varieties of ferns; camellias, witch hazel, azaleas and mature trees border a meandering brook. The Palmer Fern Dell is a welcome oasis during the summer months as a micro-fine mist system regularly envelops the garden.