Keywords: Botanical Congress Ocotillo 6c 1969 issue U.S. stamp.jpg en XIth International Botanical Congress - Ocotillo Fouquieria splendens - 6-cent 1969 issue U S stamp 1969-08-23 U S Postal Service; National Postal Museum http //arago si edu/category_2034291 html Botanical Congress Issue Bureau of Engraving and Printing Designed by Stanley W Galli other versions PD-USGov Stamps of the United States 1961-1970 Commemorative stamps of the United States Fouquieria splendens International Botanical Congress 1969 stamps of the United States US multi-colored stamps |