Here are images of the four stamps in a strip depicting Swedish botanical gardens, engraved by Martin Mörck (1955- ), and issued by Sweden on October 10, 1987, Scott Nos. 1650-53, Facit Nos. 1470-73.
Stockholm: Victoria House, with Santa Cruz water lilies, (Victoria cruziana
), designed by Eva Stockhaus (1919-2011).
Uppsala: Portrait of Swedish architect Baron Carl Hårleman (1700-1753), and his drawn plan for the botanical garden, designed by Lennart Forsberg.
Göteborg: Garden, with white anemones, designed by Eva Stockhaus.
Lund: Tulip tree flowers (Liriodendron
), designed by Lennart Forsberg.