The Rafflesia arnoldii claims the top spot, boasting a diameter of over 1 meter and weighing as much as 10 kilograms, making it the absolute titan of the botanical world.

• Bizarre Survival Strategy: Lacking roots, stems, or leaves, it acts as a total parasite within host vines—a true 'vampire' of the plant kingdom.
• The 'Corpse Flower': It emits a potent scent of rotting meat to attract carrion-feeding insects for pollination, a strategy starkly different from the fragrant blooms we typically expect.
• Size Contrast: In comparison, the world's smallest flower, the Wolffia, is a mere 0.5 millimeters across. This means the Rafflesia spans 2,000 times the width of its smallest relative, illustrating the staggering range of biological scaling.