The Unitarian Universalist Association online Leaders Library has readings, prayers, and ceremonial words for use in a Flower Ceremony.
Dr. Norbert Capek
For more about the life of Capek, see the biography, Norbert Fabian Capek: A Spiritual Journey by Richard Henry (Skinner House, 1999).
History of the Chalice
The story "Circles of Light: The Flaming Chalice" explains how Unitarian Universalist's came to have a chalice as their symbol. It can be found in the book Lamp in Every Corner: Our UU Storybook by Janeen K. Grohsmeyer (Boston: Unitarian Universalist Association, 2004).