from The Century Dictionary and Cyclopedia
- In entomology, a family of dipterous insects, the vesicular flies, having a bladdery abdomen; the Cyrtidæ or Acroceridæ.
Sorry, no etymologies found.
Caspary  mentions a flower of _Aldrovanda vesiculosa_, which was elevated on a stalk that was adherent to the stem for a certain distance, and then separated from it.
The leaves sometimes contain bubbles of air, and were formerly supposed to be bladders; hence the specific name of vesiculosa.
Habitat The Waterwheel Plant, Aldrovanda vesiculosa, is native to the acid bog pools of Africa, Asia, Australia, and Europe.