Canigre

Some years ago, when I was connected with the Arizona Experiment Station, some efforts in that direction were being made with a plant grown down in that country called Canigre. That is a plant that grows wild in certain sections of the Southwest, but because of its being a two-year crop and because of the fact that in order to make it productive, a very large amount of water was required, which made it an irrigation proposition, we determined that it would be an unprofitable crop at that time.

Futhermore, other vegetable tannins, such as ground Canigre, Quebracho, Babul bark, Mimosa tannin and pure tannic acid are found to have a similar virucidal effect and are as acerin not bactericidal.

Other teas that are potentially toxic include canigre, guarana, maté, foti and comfrey (discussed below).