The largest flower in the world is the Rafflesia.

The Rafflesia is known for its massive size and unique appearance. Here are some key details about this fascinating plant:

1. Size:
- The Rafflesia holds the title for being the largest flower in the world, both in terms of weight and diameter.
- It can have a diameter of up to three feet (about 1 meter) and can weigh as much as 24 pounds (about 11 kilograms).
- The size of the Rafflesia is truly impressive, making it a popular attraction for nature enthusiasts.

2. Habitat:
- Rafflesias are native to the rainforests of Southeast Asia, particularly in countries such as Indonesia, Malaysia, Thailand, and the Philippines.
- These flowers are parasitic and rely on other plants, specifically vines, for nutrients. They are often found growing on the roots of Tetrastigma vines.

3. Appearance:
- The Rafflesia is known for its unique appearance, which sets it apart from other flowers. It lacks leaves, stems, and true roots.
- The flower consists of five large, fleshy petals that are usually red or maroon in color, with white spots or lines on them.
- The petals are thick and leathery, giving them a sturdy structure. The center of the flower contains a spiked disc with a hole in the middle.

4. Smell:
- One of the most interesting aspects of the Rafflesia is its strong and unpleasant odor, often compared to the smell of rotting flesh.
- This odor serves an important purpose in attracting carrion flies, which are the flower's primary pollinators.
- The Rafflesia has evolved to mimic the scent of decaying flesh to ensure the presence of these flies, which aid in its pollination.

5. Rarity:
- Despite its impressive size, the Rafflesia is quite rare and difficult to find in the wild.
- The flower is notoriously elusive, as it blooms only for a few days and can take several years to appear again in the same location.
- Conservation efforts are being made to protect the Rafflesia from habitat destruction and ensure its survival for future generations.

In conclusion, the Rafflesia is the largest flower in the world, known for its massive size, unique appearance, strong odor, and rarity. It is a fascinating plant that has captivated the interest of botanists and nature enthusiasts alike.