If you'd like to honor someone and also support a worthy organization, consider a tribute tree from the Key West Tropical Forest and Botanical Garden.
As the organization states:
"A tree is a wonderful tribute to a member of your family or a friend. They provide a positive contribution that you can leave behind for the generations that follow. They provide proof of your generosity and provide you, your family, and your friends with ongoing pleasure as you enjoy the Garden in the years to come." For more information on prices and tree choices, go to http://kwbgs.org/resources/tributetrees.pdf.