Utricularia macrorhiza

Common Bladderwort

Floating aquatic. Leaves divided many times into dense thread-like bristles. Small bladders along leaf margins trap small organisms when entrance hairs are triggered. Flowers 5–20, held on 1–12 in. stalks above water, yellow; 2 lips more or less equal in size, upper lip not lobed, lower lip with 3 shallow lobes; spur curved, shorter than lower lip. Grows in quiet waters. Forms ball-like, bristly winter buds. Circumboreal. Similar introduced U. inflata has a spoke-like float to support flower stalk.

  • Rarity: Locally Common
  • Flowering Time: All Spring And Summer
  • Life Cycle: Perennial
  • Height: floating
  • Habitat: Lake/Pond
  • Found In: Olympic Np
  • Native: Yes

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