Victoria amazonica

This is a giant water lily.

It has very big leaves. These leaves float on top of the water. They can hold a lot of weight.

The leaves have small spikes on the bottom. These spikes help protect the plant from fish. The flowers bloom when the sun goes down. They smell like fruit to attract beetles. The petals start white and turn pink. This helps the plant grow in the warm Amazon.

It is a very amazing plant.

The *Victoria amazonica* is a giant water lily.

It lives in the warm waters of South America. This plant has the second largest leaves in its family. These leaves can grow very wide. They float on the water on long stalks. These stalks can be as long as a green anaconda snake.

The leaves have air spaces inside. This makes them very light. They can also hold a lot of weight if the weight is spread out. The bottom of the leaf has many small spines. These spines protect the plant from fish. They also help the plant push other plants away to get sunlight.

The flowers are also very large. They start to open when the sun sets.

The flowers give off a fruity smell. This smell attracts beetles. The flower traps the beetles inside for a day. While they are inside, the beetles eat food from the plant. The petals change from white to pink. This change happens because of tiny parts called anthocyanins. When the flower opens again, the beetles fly away covered in pollen. They then visit other lilies to help them grow.

The Victoria amazonica is a truly giant water lily. It is the second largest plant in the Nymphaeaceae family. You might know it as the giant water lily. People in Brazil call it Vitória-Régia. In the Inca language, it is called Atun Sisac, which means "great flower."

This plant lives in the warm, slow-moving waters of South America. It grows in the Amazon Basin and places like Guyana. It can grow in water that is up to 5.25 meters deep. This plant is a wonder of the tropical world.

The way this plant works is quite amazing. It has huge leaves that float on the water. These leaves stay up because they have air spaces inside. This makes the leaves very light. If you spread weight evenly, the leaves can hold a lot. One leaf in Missouri once held 35 kilograms!

The leaves grow on long stalks called petioles. These stalks can be as long as a green anaconda snake. The underside of the leaf has many small spines. These spines protect the plant from fish. They also help the lily push other plants away to find sunlight.

People have studied this plant for a long time. In 1825, a botanist named Aimé Bonpland described it. Later, John Lindley gave the plant its genus name in 1837. He named it after Queen Victoria.

In the 1800s, there was a big race between gardeners in England. Two dukes wanted to be the first to grow it. Joseph Paxton was the first to make it bloom in 1849. He used coal-fired boilers to keep the water warm. This was a very hard job to do in England.

There are many interesting facts about how the lily grows. The plant grows from a thick part called a rhizome. This rhizome can live for at least 7 years. The flowers are also very large and heavy. They only grow as large as some of the biggest flowers on Earth.

The flowers start to open right as the sun sets. They can take up to 48 hours to open fully. A single plant will have flowers that are all in the same phase. They are either all in the female phase or all in the male phase. This means they must find a different plant to make seeds.

You can think of the flower like a clever trap for beetles. The flowers give off a fruity smell to attract beetles. When the beetles go inside, the flower closes up.

The beetles stay inside and eat starchy food from the plant. While they eat, the petals change from white to reddish pink. This color change happens because of things called anthocyanins. On the second night, the flower opens to let the beetles out. The beetles fly away covered in pollen to visit other lilies. This helps the whole plant family grow and stay healthy.

The *Victoria amazonica*, commonly known as the giant water lily, is a massive flowering plant. It is the second largest species in the Nymphaeaceae family. This plant is native to the tropical waters of South America. It thrives in the Amazon Basin and regions like Guyana. It can grow in still or slow-moving water up to 5.25 meters deep.

Because of its immense size and unique biology, it is a marvel of aquatic ecology.

The plant grows from a thick, perennial rhizome. This rhizome is an underground stem that can live for at least seven years. However, seasonal changes in water levels often make the plant live for much shorter periods. From this rhizome, the plant sends out long stalks called petioles. These stalks support enormous leaves, or laminae, that float on the surface. These petioles can be as long as a green anaconda.

The leaves stay afloat because they contain many air spaces. These spaces make the leaves surprisingly light. If weight is distributed evenly, the leaves are incredibly buoyant. In 1896, a leaf in Missouri held 35 kilograms of weight.

To survive in crowded tropical waters, the lily uses several physical defenses. The stems and the undersides of the leaves are covered in small spines. These spines protect the plant from being eaten by fish or other herbivores. The spines also serve an offensive purpose. As the lily grows, it aggressively seeks sunlight. It can use its spiny stalks to push aside or crush rival plants. This allows the lily to hog the sunlight and darken the water below. This behavior prevents other plants from growing directly beneath its massive leaves.

The reproductive cycle of the *Victoria amazonica* is a complex, two-day process. The flowers begin to open just as the sun sets. It can take up to 48 hours for a flower to open fully. A single plant will have all its flowers in the same phase at once. They are either all in the female phase or all in the male phase. This ensures the plant cannot self-pollinate. Instead, it must rely on a different individual for pollination.

This mechanism promotes genetic diversity within the species.

The plant has co-evolved a mutualistic relationship with scarab beetles of the genus *Cyclocephala*. These beetles are the primary pollinators. On the first night, the flower buds open and release a fruity smell. The white petals attract the beetles with both color and scent. Once the beetles enter, the flower closes and traps them inside. The interior contains spongy, starchy tissue that provides food for the beetles. During this time, the plant releases anthocyanins. These pigments change the petal color from white to a reddish pink.

This color change signals that pollination has occurred.

On the second evening, the flower opens enough to release the trapped beetles. As the insects push through the stamens to exit, they become covered in pollen. The beetles then fly to a newly opened flower of a different plant. This completes the pollination cycle. This specific process was described in detail by researchers Sir Ghillean Prance and Jorge Arius. The flowers themselves are massive. They can grow up to 30 centimeters in diameter. Their weight is exceeded in mass only by members of the genus *Rafflesia*.

The history of this plant involves intense scientific and social interest. In 1837, John Lindley described the genus *Victoria*. He named it to honor Queen Victoria. This followed earlier work by botanists like Aimé Bonpland in 1825 and Eduard Friedrich Poeppig in 1832. In the 19th century, a famous rivalry emerged among English gardeners. The Duke of Devonshire and the Duke of Northumberland competed to grow the lily. Joseph Paxton, working for the Duke of Devonshire, was the first to make it bloom in 1849. He used coal-fired boilers to mimic a warm swamp. The leaf structure even inspired Paxton's design for the Crystal Palace.

Today, *Victoria amazonica* is a popular subject in botanical gardens worldwide. To grow them, gardeners must provide warm water between 29 and 32°C. While not currently considered endangered, the plant faces potential threats. Deforestation and climate change could impact the wetland ecosystems it relies on. However, a 2022 assessment suggested it be listed as "Least Concern" due to its wide distribution.

It remains a vital part of the Amazonian landscape.