Utricularia floridana - Nash
Lentibulariaceae (Bladderwort) Family
Photo courtesy Carol Graves, Brewton, Alabama
Common bladderwort is a submerged aquatic often overlooked, but remarkable carnivorous plant. The plant is native to the Northern Hemisphere, and is known to occur in fifty of the United States. It is found in lakes, interdunal ponds, wet marshes, and rivers and streams; often in water up to 6 feet deep. Common bladderwort is occasionally used in tropical aquariums, but it has a habit of growing quickly and intertwining with other aquatic plants, requiring frequent maintenance.
The leaves are actually underwater leaf-like stems containing numerous small bladders.
The flowers grow above water; yellow; two-lipped with a forward facing spur on the lower lip with highly divided, underwater leaf-like stems and numerous small "bladders". The flowers grow above water; yellow; two-lipped with a forward facing spur on the lower lip.
The "bladders" (from which the common named is derived) are used to capture small aquatic organisms. Hairs at the opening of the bladder serve as triggers, and when contacted, mechanically cause the trap to spring open, drawing in water and organisms like a vacuum. Enzymes and /or bacteria inside the traps aid in digestion.
Several insects, mammals, and waterfowl use common bladderwort as a food source, and others use the stems as shelter, or to lay eggs. The genus Utricularia is Latin meaning "little bag"; referring to the "bladders" on the stems.