This 30+10 sen stamp from the Republic of Indonesia, issued in 1966, features the vibrant orange Ixora coccinea, locally known as Soka. A member of the Rubiaceae family, this ornamental plant is widely admired for its clustered blooms and cultural symbolism. The "+10 sen" surcharge likely supported a public cause, common in semi-postal issues of the era. The detailed botanical illustration is framed with the denomination and the national emblem in the top left corner. A beautiful example of Indonesia's floral-themed philatelic issues.