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Plant Database

Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.

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Utricularia intermedia (Flatleaf bladderwort)
Smith, R.W.

Utricularia intermedia

Utricularia intermedia Hayne

Flatleaf Bladderwort, Mountain Bladderwort

Lentibulariaceae (Bladderwort Family)


USDA Symbol: UTIN2

USDA Native Status: L48 (N), AK (N), CAN (N), GL (N), SPM (N)

In all species of Utricularia the bladders are elaborate traps. When a small organism brushes hairs near a bladder pore, the pores tiny door opens inward and water rushes inside, carrying the organism with it. The door quickly closes, the trapping process taking 1/460 second. Enzymes digest the victim. Comparatively large organisms, such as mosquito larvae, may be caught in the door; if the door is repeatedly triggered, they are then digested little by little. Utricularia intermedia has bladders on special branches distinct from the leaves.


From the Image Gallery

3 photo(s) available in the Image Gallery

Plant Characteristics

Duration: Annual
Habit: Herb

Bloom Information

Bloom Color: Yellow
Bloom Time: May , Jun , Jul , Aug , Sep


USA: AK , CA , CT , IA , ID , IL , IN , MA , MD , ME , MI , MN , MT , ND , NH , NJ , NV , NY , OH , OR , PA , RI , UT , VT , WA , WI , WY
Canada: NB , NL , NS

National Wetland Indicator Status

This information is derived from the U.S. Army Corps of Engineers National Wetland Plant List, Version 3.1 (Lichvar, R.W. 2013. The National Wetland Plant List: 2013 wetland ratings. Phytoneuron 2013-49: 1-241). Click here for map of regions.

Web Reference

Webref 30 - Calflora (2018) Calflora
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter

Additional resources

USDA: Find Utricularia intermedia in USDA Plants
FNA: Find Utricularia intermedia in the Flora of North America (if available)
Google: Search Google for Utricularia intermedia


Record Modified: 2023-04-10
Research By: TWC Staff

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