Parkinsonia aculeata
Jerusalem Thorn, Mexican Palo Verde

A tough and drought-tolerant deciduous tree producing  yellow flowers in loose, long clusters. Fine-textured, long and linear foliage. Bright yellow-green trunk and branches, with spiny twigs.

USDA zones: 9 - 11
Sunset zones: 8 - 24, H1, H2
Mature size: 15 - 20 feet high and wide
Light needs: full sun
Water needs: little to moderate water