1979 15¢ Persistent Trillium
Issue Date: June 7, 1979
City: Milwaukee, Wisconsin
Printed By: Bureau of Engraving and Printing
Printing Method: Photogravure, Andreotti Press
This stamp is part of a se-tenant issue showcasing four of the more than 1700 plant species likely to become extinct if threats to their existence are not removed. The stamps were issued during the National Convention of the Garden Clubs of America.