Herbarium of the Ancients — Detailed Record

Castela emoryi

Please read before use: the information below describes traditional and informational uses — it does not replace the advice of a healthcare professional. If in doubt, pregnant, breastfeeding, undergoing treatment, or for use with children, consult a professional before use.

Enhanced precautions for this plant: Plant with limited scientific study: the complete chemical composition and toxicity risks are not well established; caution requires consulting a professional before any internal use. The bitter compounds of Simaroubaceae may be irritating to the digestive tract at high doses or with prolonged use. Internal use not recommended for pregnant or breastfeeding women, or for children, due to lack of safety data. Do not confuse with other thorny desert species; certain botanical identification is essential before any harvesting.

Decoction — Dried bark and stems

Traditional bitter decoction

A piece of dried bark or stem is gently boiled in water for about fifteen minutes, then filtered. This very bitter preparation was used sparingly according to oral tradition; a healthcare professional's advice is required before any use, as no reliable dosage has been established. Dosage must be validated with a healthcare professional or recognized pharmacopoeia before use.

Wash — Stems and bark in diluted decoction

Soothing external wash

A more diluted decoction than that intended for internal use was cooled and then applied as a wash to the skin using a clean cloth. This traditional external use nevertheless requires prior verification of the absence of skin reactions. Dosage must be validated with a healthcare professional or recognized pharmacopoeia before use.

Where to find it

Obtaining the plant

Castela emoryi grows wild in the Sonoran and Mojave deserts (Arizona, California, northern Mexico); it is rarely cultivated and almost absent from herbal commerce outside these regions.

Harvest season

When to harvest

Bark and stems are traditionally harvested at the end of the dry season, when the plant is least filled with sap.

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