Hesperocyparis stephensonii, commonly known as Cuyamaca Cypress, is an evergreen tree native to the chaparral and mixed evergreen forests of Southern California, particularly in San Diego County. It is adapted to dry, rocky slopes and ridges at elevations of 900 to 1500 meters, where it plays a role in the local ecology as a fire-adapted species. Mature trees may attain heights of 10 to 16 meters (33 to 52 feet) with a spreading habit and a central leader, often appearing slightly taller than wide. The foliage is dense with scale-like leaves, and the bark is fibrous and reddish-brown. It produces small, inconspicuous cones.

The Cuyamaca Cypress is critically endangered, with the native population severely reduced by wildfires. It is valued in cultivation for its drought tolerance and suitability for xeriscaping, as well as its rarity and conservation status. It is used in native plant gardens, natural landscaping, and habitat restoration projects. This species requires full sun, low water once established, and well-drained soils. It is not commonly available in the nursery trade, but efforts are ongoing to propagate it for conservation purposes. Gardeners should be aware of its endangered status and the importance of sourcing plants responsibly.CC BY-SA 4.0