Wayne Lundberg wrote:

> My wife is wondering how they were used for healing. Any ideas?

"Las cataplasmas y fomentos de cuetlaxóchitl se aplican para alguna
enfermedades de la piel como la erisipela."

You might do some googling for the medicinal or folk medicine use of
the sap of succulents in the genus Euphorbia. There are a lot of cacti
in the genus.

Certain tribes in North Africa used a Euphorbia sap to enhance scarring
of the penis. The result was a natural French tickler.

But you probably didn't want to know that...