Issued in 1966 by the Republic of Indonesia, this semi-postal stamp features the vivid Barleria cristata, locally known as “Djarong.” The design captures the plant’s elegant pinkish-purple blossoms surrounded by lush green foliage, celebrating the country’s rich tropical flora. With a denomination of 20 + 5 sen, the surcharge supported social causes while promoting botanical awareness. This issue is part of Indonesia’s floral definitive series that combined beauty with charity, making it a meaningful collectible for both thematic and classic philatelists.