Cercidium praecox 'AZT' , Sonoran Palo Verde . These Palo Brea clones have dark blue-green leaves and trunks. They produce brilliant yellow blooms that appear abundantly in spring and intermittently durings the summer and fall months. The characteristic that sets these 'AZT' clone apart from seed selections is increased cold hardiness to the upper teens low 20's F. Prosopis Hybrid 'AZT' , Thornless Mesquite . These trees exhibit a uniform appearance, upright growth and strong branch angles.
Leaflets give the canopy a lush green look.
The characteristics that set these 'AZT' clones apart from seed selections are the thornless, uniform upright growth and, with sound horticultural practices, root mass growth that is in proportion to canopy growth. Olneya tesota 'AZT' , Desert Ironwood . Chilopsis linearis 'AZT Bi-Color' , Desert Willow . The 'AZT Bi-Color' produces abundant blooms during the growing season against a canopy of narrow, weepy, deep green leaves making the tree a colorful and striking addition to the landscape. The floral characteristic that sets this 'AZT' clone apart from seed selections are burgundy colored petals contrasting with a pale pink throat.