Desert Willow. I really want to replace our Crepe Myrtles for this. They are so pretty and fragrant. The ones near my office still had flowers on them all summer long even though we didn't have any rain and had 110 degree heat.
Chitalpa tree The drought-tolerant Chitalpa tree (Chitalpa x tashkentensis) will grow 2 feet or more every year to a mature height of 25 to 30 feet. It has an open branching structure and casts a dappled shade. This heat-loving tree blooms with pink, white or lavender flowers all summer long. Low water usage after it is established in your xeriscape garden.
Royal Empress Tree ~ Lavender flowers that smell like Lavender and cascade in Spring! Zones 5-11. Up to an incredible 15 feet of growth per year! Disease & insect resistant. Easy to grow and drought tolerant.