332 PLANTS PRODUCING GUMS AND RESINS 



Maiden says that this gum differs from the insoluble gum of the 

 acacia in that the latter swells up in water in a more coherent manner, 

 while the former forms curdy masses. 



AlbJzzia Sassa — This tree grows at Nossi-Be and Lamandra. The 

 trunk exudes a gum called sassa, the properties of which resemble 

 those of gum Bassora. 



Albizzia stipulata — Gum is obtained from all the albizzias by 

 making incisions in the stems, and though not much used as a whole, 

 that of Albis3ia stifiilata is employed in the manufacture of paper in 

 Nepal (India). 



Algarobia glandulosa — This small tree occurs in the West of 

 Texas and, according to Captain Marcy, is found in abundance on 

 the banks of the Colorado. It is fairly common in several parts of the 

 world. 



It exudes spontaneously a gum called mezqueet; incisions facilitate 

 and increase production. In certain months, July and August, it can 

 be collected in large quantities. Its colour varies from pale yellow 

 to dark amber. 



M. Shumard gives its composition, and states that it contains 

 84*g6 per cent, of arabin. It is very soluble in water and forms 

 an adhesive mucilage. 



Calliandra portoricensis — The trunk exudes a peculiar gum known 

 in Brazil as copaltic. 



Dicrostachys cinerea. — This plant yields an astringent .gum 

 (Lanessan). 



Parkia biglandulosa. — This gum occurs in flattened or roundish 

 tears ; the colour is reddish brown ; it is insoluble in water and changes 

 in this liquid to a brown jelly. It has practicaly no value. 



Piptadenia rigida — This leguminous plant resembles an acacia and 

 produces a gum analogous to gum arable, known in commerce as 

 gum angico. It is largely used in Brazil, where it is regarded as 

 being superior to gum arabic. The plant is very common in that 

 country and is very productive. 



Xylla dolabriforirtis. — The trunk of this tree exudes a red gum 

 resin. 



