Herb flat vesicles (Utricularia intermedia syn. Utricularia media) is carnivorous, perennial aquatic plant, belonging to the Lentibulariaceae. The plant is native to Europe, Asia and North America. In the Netherlands, the Dutch Red List species in the plant as very rare and moderately decreased. In Belgium, where the plant is protected as threatened if the Flemish Red List of plant stands. The chromosome number is n = 22.
The stems of the plant may be 10-50 cm long. The plant is submerged (submerged). The roots suspended in the water. The sensitive plant is whitish ground lots and lots of water with green leaves. The light green, leaf spring piece has thread-like lobes, which have smooth edges and a sudden going on a spiked top. At the top are little hairs on each side 4-12. Only on the ground shoots are whitish bladder-like appendages, trapping bubbles. The plant is winter buds Turion.
Flat vesicles herb blooms from July to August in yellow, above the water surface, 9-14 mm wide flowers, but blooms but very rarely. The palate has dark purple stripes. The flower has a conical track, almost as long as the lip. Inflorescence a raceme with 2-4 flowers.
The fruit is a round capsule, but is almost never formed in the Netherlands.
With the capture sores are small crustaceans and aquatic insects caught. The vesicles trapping dominates a vacuum and as a pet hairs touch the bubble pops it open and suck the surrounding water with the prey animal inside. Digestion of the prey takes, depending on the size, twelve minutes to two hours. After digestion transporting special cells to nutrient-rich water into the stem, while the vacuum in the bubble is restored.
See also: International Flower Delivery, Florist