KIMOSACEAE 



grow well in the nursery. Seed, however, are difficult to collect 

 and plants with well developed root systems are hard to transplant, 

 at least from the field. 



Cal l iandra h umil is is hardly comparable to £^ e r iophylla , 

 chiefly because of its comparative scarcity. It has a wider range 

 with us than the latter, extending farther north and reaching into 

 higher altitudes. It is, however, confined to central and southern 

 Arizona and outside of Mexico* It ic highly palatable and a fair 

 soil hinder but does not withstand grazing well, 



Call iandra r etic ulata is even less abundant than C. humilis . 

 It in so small, usually not more than six inches tall, and so sparce 

 on tho ground that it is relatively unimportant either for grazing 

 or for erosion control. Its high oal at ability is one reason for 

 its relative scarcity. It has approximately the same range as C. 

 er iophy lla, 



♦Calliandra schottii is probably confined in our range to the 

 Baboquivari, Santa Oatalina and Chiricahua Mountains. It is a lar- 

 ger bush than oven C, or io ph ylla and is more erect in habit. Clumps 

 which have not boon severely grazed are three to four foot high. 

 Each plant is a dense clump of stoma with a root system composed of 

 numerous fibrous roots a quarter of an inch or more in diameter. 

 This species promises to be important where it will grow within our 

 range. Up to the present we have obtained no seed for propagation 

 work. 



Lys iloma thornberii is a very rare shrub found only in our 

 range in the extreme southwestern mountains. It was described from 

 material collected by Professor Thoraber in the Rincon Mountains 

 east of Tucson, Arizona. It occurs also in the Eaboquivaris and 

 doubtless others of the southwestern ranges. It quite closely re- 

 sembles Acacia mill if alia. In fact, the usual observer would 

 pronounce this plant an Acacia, It is somewhat taller than a. 

 ai llif ol ia and probably is suitable for use under similar conditions 

 and in similar sites to that in which the last species may be used. 



♦.acacia g r e gg i j , C at c I aa , is widely distributed throughout the 

 desert regions of southern Arizona, southern Hew Mexico and Mexico. 

 It is most abundant alone, draws, swales and rocky canyons from 

 2,000 to 6,000 feet elevation. Occasionally it makes a small tree 

 but is more frequently a sprawling shrub. The recurved thorns make 

 this plant unwelcome to stock and man, though it is a good soil 

 binder and is browsed to some extent. The flowers arc visited by 

 innumerable bees and Catclaw honey is highly prized. The wood is 

 very hard and tough and is used locally for making single-trees, 



