GUMS, RESINS, AND OTHER VEGETABLE EXUDATIONS. 171 



Dodoncea viscosa, Linn. 



This common Australian shrub has not been credited in Aus- 

 tralia with yielding a gum or a resin, but a resin in India is noted 

 in Pharm. Indica, i., 372. v 



BURSERACE^E. 



Canarium Muelleri, Bail. 



I have examined the oleo-resin of this tree; see (55). Dr. 

 Lauterer (33) found amyrin in this oleo-resin and describes its 

 composition at some length. 



ANACARDIACEiE. 



Semecarpus Anacardiu?n, Linn., "Marking-nut Tree" of India. 



In India a brown, nearly insipid gum, exudes from the stem. 

 It has otherwise been described as a "coarse black gum." We 

 have a closely allied species (S. australiensis, Engler) in Queensland 

 and Northern Australia. 



The so-called Pepper-tree (Schinus molle), so largely cultivated 

 in Australia, freely yields an aromatic resin which has formed tho 

 subject of research. It is alluded to in Pharm. Journ. 21st Oct.,. 

 1899, p. 377. 



The Garcinia collina, Yieill., of New Caledonia yields a gum- 

 resin comparable to Gamboge. Heckel and Schlagdenhauffen, 

 Pep. de Pharm. [3] 5, 193; full abstract in Pharm. Journ. [3] r 

 xxiii. 989. The exudations of the trees of the South Sea Islands 

 have a special interest for us. The genus Garcinia is represented 

 in Queensland by an indigenous species. 



Leguminos^e. 

 Acacia spp., "Wattle Gum." 



My paper (44) is so comprehensive that it will be sufficient to 

 add a few supplementary notes. Probably the best modern 

 analysis of a Wattle Gum is that by Winthrop E. Stone of A. 

 decurrens. 



Wattle Gum undoubtedly possesses nutritive properties. Accord- 

 ing to Wilhelmi, the Port Adelaide tribes lived almost exclusively 



