11th International Botanical Congress

First Day of Issue CONGRESS 6° TLE AUG E 23 1969 PSEUDOTSUGA MENZIESII Cypripedium reginae RNATIONAL FIRST DAY OF ISSUE CYPRIPEDIUM REGINAE FOUQUIERIA SPLENDENS FRANKLINIA ALATAMAHA Commamorating 11*INTERNATIONAL BOTANICAL CONGRESS Ar Craft SEATTLE, WASHINGTON SEAT NI BOTANICAL