What compounds found in the root bark of *Ceanothus americanus* historically served an aquatic purpose?

Answer

Saponins, used to stupefy fish.

The root bark contains saponins, which are chemical compounds historically utilized by some indigenous groups to temporarily paralyze aquatic life for harvesting.

What compounds found in the root bark of *Ceanothus americanus* historically served an aquatic purpose?
foodplantEdibilityHerbtea