Utricularia gibba L.
Bladderwort, Conespur bladderpod, Humped bladderwort
Lentibulariaceae (Bladderwort Family)
Synonym(s): Utricularia biflora, Utricularia fibrosa, Utricularia obtusa, Utricularia pumila
USDA Symbol: utgi
Humped bladderwort is a perennial aquatic herb without roots. It has slender stems which may be floating, submerged or creeping along the substrate. The stem leaves are threadlike with hairless margins, alternate, numerous, and between 1/8 and 3/8 in. long. They may be undivided or generally 2-parted at the base and each part may be forked again. The bladders or “traps” are 1 or 2 valve-lidded and borne on leaves that are less than 1/16 in. wide - it is these structures that trap small invertebrates such as insects. Inflorescence have 1 to 4 yellow flowers 6 to 8 mm (¼ to 5/16 in.) long at the end of a 15 cm (6 in.) stalk.
Bladderworts are carnivorous plants with complex modified underwater appendages or “sacs” that trap insects and other small animals; this provides them with excess nutrition which allows them to survive in low nutrient conditions.
From the Image Gallery
Plant CharacteristicsDuration: Perennial
Leaf Arrangement: Alternate
Size Notes: 1-6 inches.
Size Class: 0-1 ft.
Bloom InformationBloom Color: Yellow
Bloom Time: May , Jun , Jul , Aug
DistributionUSA: AL , AR , CA , CT , DC , DE , FL , GA , HI , IA , IL , IN , KS , KY , LA , MA , MD , ME , MI , MN , MO , MS , NC , NH , NJ , NY , OH , OK , OR , PA , RI , SC , TN , TX , VA , VT , WA , WI , WV
Canada: NB , NS
Growing ConditionsLight Requirement: Sun
Soil Moisture: Wet
Conditions Comments: Water must be rich in microorganisms for the insectivorous bladderwort to survive.
BenefitConspicuous Flowers: yes
Interesting Foliage: yes
National Wetland Indicator Status
From the National Organizations DirectoryAccording to the species list provided by Affiliate Organizations, this plant is on display at the following locations:
Fredericksburg Nature Center - Fredericksburg, TX
Lady Bird Johnson Wildflower Center - Austin, TX
Nueces River Authority - Uvalde, TX
BibliographyBibref 841 - Native Alternatives to Invasive Plants (2006) Burrell, C. C.
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Additional resourcesUSDA: Find Utricularia gibba in USDA Plants
FNA: Find Utricularia gibba in the Flora of North America (if available)
Google: Search Google for Utricularia gibba
MetadataRecord Modified: 2007-08-10
Research By: TWC Staff