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Intermediate Bladderwort

Utricularia intermedia

Please keep in mind that it is illegal to uproot a plant without the landowner's consent and care should be taken at all times not to damage wild plants. Wild plants should never be picked for pleasure and some plants are protected by law.
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Plant Profile

Flowering Months:
Lentibulariaceae (Bladderwort)
Life Cycle:
Maximum Size:
30 centimetres tall
Bogs, ponds, swamps, water.

Yellow, 2 petals
Yellow, Snapdragon-like flowers (up to 14mm across) and a spur, up to 1cm long. Rarely flowering.
The fruit is a rounded capsule (rarely seen).
Green leaves which are arranged alternately along the stems. This species of Bladderwort never has bladders, unlike most of the other species. Perennial and carnivorous.
Other Names:
Flatleaf Bladderwort.
Frequency (UK):

Similar Species

Other Information


Utricularia intermedia, also known as intermediate bladderwort, is a small, carnivorous aquatic plant that is native to North and Central America. It is a member of the Lentibulariaceae family and is known for its small, bladder-like structures that are used to trap and digest small aquatic animals, such as water fleas and protozoa. The plant has thin, delicate stems and small, yellow or purple flowers that are borne on long stalks above the water surface. It is a popular plant for aquaria and is often used in naturalized ponds or water gardens. U. intermedia is a fast-growing plant that is easy to care for and is tolerant of a wide range of water conditions. It prefers full sun and can tolerate a wide range of pH levels. It is important to note that U. intermedia is a protected species in some areas and may not be collected or removed from the wild without permission.


Intermediate Bladderwort (Utricularia intermedia) is a carnivorous aquatic plant species belonging to the family Lentibulariaceae. It is a popular species of bladderwort among aquatic plant enthusiasts for its attractive, delicate foliage and interesting method of capturing prey.

Intermediate Bladderwort is native to North America and can be found growing in still or slow-moving freshwater habitats such as ponds, ditches, and swamps. The plant can grow up to 30cm in length and features thin, delicate leaves and small, yellow, snapdragon-like flowers that bloom from July to August.

What sets Intermediate Bladderwort apart from other aquatic plants is its method of capturing prey. The plant is equipped with tiny, bladder-like traps that are filled with a vacuum. When small aquatic insects and other prey touch the trigger hairs on the outside of the traps, the vacuum is released, and the prey is sucked into the bladder, where it is digested by the plant.

In addition to its unique method of capturing prey, Intermediate Bladderwort is also appreciated for its ornamental qualities. The plant is easy to care for and can be grown in a variety of aquatic settings. It is a great addition to any pond, water garden, or bog garden and can be grown in pots or in the ground.

Intermediate Bladderwort is also a hardy species and can survive in a range of water conditions, making it a suitable plant for both novice and experienced aquatic gardeners. However, it is important to provide the plant with adequate lighting, as it requires plenty of sunlight to thrive.

Aside from its ornamental and carnivorous features, Intermediate Bladderwort has also been studied for its potential medicinal properties. In traditional medicine, extracts from the plant have been used to treat a variety of ailments, including wounds, skin conditions, and respiratory issues.

In recent years, research has been conducted on the plant's antimicrobial and anti-inflammatory properties, with studies showing promising results. However, more research is needed to fully understand the medicinal potential of Intermediate Bladderwort.

It is also worth noting that, like all species of bladderwort, Intermediate Bladderwort is considered invasive in some areas. The plant is capable of rapidly colonizing aquatic habitats and can outcompete native plants, causing harm to local ecosystems. As such, it is important to monitor the growth of this plant and to control its spread in areas where it is considered invasive.

In terms of cultivation, Intermediate Bladderwort is best propagated through division of the roots or by planting seeds. The plant prefers neutral to slightly acidic water and can be grown in full sun to partial shade. It is important to provide the plant with adequate lighting and nutrients, as well as to maintain proper water levels, to ensure its growth and health.

Additionally, Intermediate Bladderwort plays an important role in maintaining the balance of aquatic ecosystems. As a carnivorous plant, it helps to control the population of small aquatic insects and other prey, which in turn helps to prevent overpopulation of these species and maintain the overall balance of the ecosystem.

The plant is also an important source of food for many aquatic animals, such as frogs, dragonflies, and damselflies. These animals feed on the small insects and other prey that are trapped by the bladderwort, providing them with a source of nutrition and helping to sustain the ecosystem.

It is also important to note that, like many aquatic plant species, Intermediate Bladderwort is threatened by human activities such as pollution, habitat destruction, and climate change. These activities can harm or destroy the plant's natural habitats, reducing its populations and putting it at risk of extinction.

To help protect this species and ensure its continued survival, it is important to be mindful of the impact of our activities on aquatic ecosystems and to work to preserve and protect these important habitats. This can be achieved through a variety of means, such as reducing pollution, conserving and restoring wetlands, and planting and maintaining aquatic plant species like Intermediate Bladderwort in our own gardens and ponds.

In conclusion, Intermediate Bladderwort is not only an attractive and fascinating species of aquatic plant, but it is also an important part of the ecosystem and plays a critical role in maintaining the balance of aquatic habitats. By preserving and protecting its habitats and being mindful of our impact on aquatic ecosystems, we can help to ensure the survival of this unique and valuable species for generations to come.