- shrubby senna
Native Geographic Range
- Southwestern North America
Cultivation Status in AZ
Cold- and drought-deciduous shrubs to 2.5 ft (2 m) or sometimes to 16 ft (5 m) high with slightly rough, brown bark. Leaves are once-pinnate with 2--6 pairs of small, dull green leaflets. Showy masses of golden-yellow flowers are produced in late summer.
Native to small areas of southeastern Arizona and southwestern New Mexico, and in northern Mexico. Occurring in the Chihuahuan Desert, and rarely in the Sonoran Desert and in semidesert grasslands, on rocky slopes usually of limestone.
Shrubby senna is occasionally planted in Arizona for its showy flowers. Established plants are drought tolerant but require occasional irrigation in dry weather to maintain leaves. Leaves are killed with freezing temperatures and the plants leaf out later in the spring than many other landscape plants. This species is hardy to at least 0° F (-18° C). Litter is minimal.