Graythorn
Sarcomphalus obtusifolius

Family: Rhamnaceae

This plant was, until recently, known as Ziziphus obtusifolia

Most of the time a large, spinescent shrub to about 8’ but sometimes a tree to 15 or even 20’. Flowers May-September with small flowers, followed by blue to purple berry-like fruits. Deciduous in cold or drought.

Full to part sun, will grow in shady spots too but may not flower or fruit as often. Provide good drainage, and moderate to low water when established. Hardy to around 15°F.

An incredible wildlife plant providing nesting habitat, safe haven for birds (because of the spinescent branches), nectar rich flowers that attract all sorts of insects, fruits and insects also attract many birds. Larval host for Pyrrha’s prominent moth (Cargida pyrrha).

The fruits are edible and best made into preserves or syrups. A decoction from the roots is used to treat sore eyes and roots have been used as soap (contain saponins).

Ziziphus comes from the Persian word zizufun or Arabic zizouf, the Arabian name for a shrubby Mediterranean tree, obtusifolia means obtuse- or blunt-leaved. We are not yet sure about the etymology of Sarcomphalus. Stay tuned as we figure it out.

Found on mesas, canyon slopes, desert grasslands and along drainages from 1,000-5,000’ in the southwestern United States (from California to Texas) south into central Mexico.

Sarcomphalus obtusifolius on iNaturalist

Photo by Max Licher, SEINET

Fruits and shrub form of graythorn. Photos by David Thornburg, SEINET

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Whitethorn Acacia (Vachellia constricta) (Copy)