View photos of the medicinal plant Jatropha cuneata (Limberbush), profiled in Medicinal Plants of the American Southwest.

View photos of the medicinal plant Jatropha cardiophylla (Limberbush), profiled in Medicinal Plants of the American Southwest.

A passage from Medicinal Plants of the American Southwest:

All species of Limberbush are extremely astringent. The roots by weight contain approximately 5% tannic acid. This dominant phenol group (hydrolyzable tannin) is the reason why these plants are able to tan hides.