With both groups of fish in a single tank, they then introduced the barbasco root to determine how both groups would react.
From the sciencedaily.com
Then Dr. George Rosenkranz, at that time a Syntex research chemist, found that the Mexican yam, or barbasco root, yielded much larger amounts of diosgenin.
From the time.com
As part of the annual ritual, they release into the cave's waters a distinctive, leaf-bound paste made of lime and the ground-up root of the barbasco plant, a natural fish toxin.
From the sciencedaily.com
In the case of the Zoques, it may mean a few limitations on barbasco usage for their ritual, such as releasing the toxin only 50-to-60 meters into the cave rather than 100 meters.
From the sciencedaily.com
More examples
West Indian shrub or small tree having leathery saponaceous leaves and extremely hard wood