View photos of the edible and medicinal plant Juglans major (Canyon walnut), profiled in Sonoran Desert Food Plants and Medicinal Plants of the American Southwest.

A passage from Medicinal Plants of the American Southwest:

In small, sub–laxative doses, Canyon walnut is tonifying and soothing to the gastrointestinal tract. It is mainly useful in quieting gastritis, irritative diarrhea, and intestinal inflammation with associated ileocecal irritation. Use the tea or tincture when chronic intestinal inflammation is causing nutrient malabsorption, particularly of fats.