The Czechoslovak Botanical Society (Societas Botanica öechoslovaca) takes the pleasure to inform you that a “Jubilee Congress of Czechoslovak Botanists” will be arranged to celebrate the 50th anniversary of its foundation. The Congress will take place in Prague beginning July 1st till July 8th, 1962, and it is hoped to invite guests from abroad. The program-item will be Experimental Taxonomy. For this special occasion a double number of Preslia will be published containing the main reports. During the Congress excursions will be arranged to botanically and culturally interesting regions of Southern, Western and Central Bohemia.