Arizona Ar.Kicii^TLKAi, lv\iM;ja.\ii..\ i w^iaiiox 461 



Arizona. Young trees, three years from planting-, are six to eight 

 feet tall, while trees in the Salt River Valley six years old are 

 25 to 30 feet tall. This tree has a rather open, spreading habit of 

 growth and bears cones when five to six years old. 



Cork Oak (Qnoxus suher). This is an important commercial 

 tree in Spain and is an attractive live oak, picturesque in appear- 

 ance, but of slow growth. Tlic jilants on the University grounds 

 are sturdy and healthy and appear well suited to conditions in 

 southern Arizona. They have made growths of four to five feet 

 in three years' time. 



Willow-leaf Pittosporum (Pittospontm phillyracoidcs) is a grace- 

 ful, weeping evergreen with brown, slender twigs and smooth, 

 glossy, willow-like leaves. It is a native of vVustralia. It is slow 

 to become established, but makes good growth afterwards. It is 

 entirely hardy to our climatic conditions and thrives in both mesa 

 and valley soils. During the ten years it has been under observa- 

 tion, it has not suffered injury from heat or frost. 



Mastac Tree (Pistacia lentiscitsj is a robust, spreading evergreen 

 shrub from the Mediterranean region and grows four to ten feet 

 high. The leaves are smooth and pinnately divided with six to ten 

 leaflets. During the 18 years' time it has been growing on the 

 campus it has never been injured with heat or frost. It thrives in 

 a variety of soils and is tolerant to considerable alkali. The seeds 

 are said to yield 20 percent by weight of oil. 



feijoa SelloK'oua is a hardy evergreen shrub with spreading 

 branches and oval or oblong leaves which are one inch or more 

 long, green above and grayish-white beneath. It is a native of 

 Brazil and is said to grow well wherever the olive succeeds. In 

 five years' growth on the campus it has not been injured with heat 

 or frost. It blossoms in the spring, but as yet has not borne 

 fruit. 



Yellow Jasmine (Jasminum hniiiilc). This is a tall, loose-grow- 

 ing evergreen shrub with spreading branches and is a native of 

 southern Asia. It grows rapidly and blossoms profusely in the 

 spring. The flowers are borne in clusters and are yellow^ and very 

 fragrant. The leaves are pinnately divided with five to seven 

 leaflets. 



Jasminum primuUmtui is a low-growing, evergreen shrub from 

 China. The branches are spreading and recurved and often root 

 at the tips. The leaves are 3-divided, and the flowers are produced 

 early in the spring, and are yellow and fragrant. This plant en- 

 dures our summer heat and zero degrees Fahrenheit temperatur;^ 



