Caesalpinia gilliesii (Yellow Bird of
Paradise) has probably been used in desert landscapes
longer than any of the other species. Like the others, it will
grow as a mounding shrub to a height of 6' to 10' tall and as
wide. This deciduous shrub is hardy to 10 degree F and fast
growing. Shrubs can be pruned strongly when dormant to promote
denser growth and maintain shrub form. It can be trained into a
small tree but such specimens tend to have very dispersed
canopies. Flowers are bright yellow with long red stamens that
extend beyond the flower petals. Flowers are produced from
spring through summer with the strongest displays in early
summer. This species has naturalized in some desert locations
and can survive on annual rainfall.