Parkinsonia microphylla (Foothill Palo Verde)

Nativity: Native to the Sonoran Desert of southern Arizona and northern Mexico, including the Tucson region.

Ecology: Found on rocky slopes, bajadas, and desert uplands. This iconic desert tree provides essential habitat—offering nesting sites, shade, and seasonal food for birds and other wildlife. Its bright yellow spring blooms attract native bees and other pollinators, while seeds are used by birds and small mammals.

Elevation: 1,000 – 4,000 ft

Size: Small desert tree, typically 15–25 ft tall and wide

Flowering Duration: Spring (March – May), with showy blooms following winter rains

Sun/Shade Preference: Full sun

Foliage Duration: Drought-deciduous; tiny leaves drop during dry periods, while green bark continues photosynthesis