194 J. H. MAIDEN. 



familiar to people in New South Wales. It was of the consistency 

 and colour of thick cream and perfectly homogeneous when freshly 

 exuded. It gradually separates into two layers, a lower creamy 

 or grey-colored portion, and a brown liquid of hardly higher 

 specific gravity than water. Both layers continue to darken in 

 colour. Analysis of this milky juice, completed within a month 

 of exudation, remains a desideratum. A specimen I sent to 

 Prof. E. H. Rennie, of Adelaide, was examined by him and Mr. 

 Goyder (71). 



Liliace^:. 

 Xanthorrhcea spp. "Grass Tree Gum." 



I believe my paper on the aromatic resins known as Grass-tree 

 Gum in Agric. Gazette (49) will supply sufficient information 

 for most enquirers. It contains an extensive bibliography of 

 the subject. 



See also K. Hildebrand (18), Tschirch and Hildebrand (83), 

 Schimmel (74), the " Garden and Field" (Adelaide), July, 1894, 

 p. 64; the Qhemist and Druggist of Australasia, of 11th December, 

 1897, p. 923, recording some Imperial Institute researches; and 

 the same journal for February, 1898, p. G3. 



At the junction of Berowra Creek with the Hawkesbury River 

 I found (27th April, 1889) a true gum exuding from aborted 

 (through insect punctures) flowering-spikes of this species. A 

 larger quantity was also found on the caudices of other individuals 

 and some samples exhibited now show a resin ("grass tree gum") 

 and a true gum in close juxtaposition. This is another example 

 of the few instances in which the sample genus is capable of 

 yielding both a gum and a resin. 



Xanthorrhcea Preissii, Endl. 



For a partial examination of this Grass-tree Gum, collected by 

 the Elder Exploring Expedition, see (61 a). It is a native of 

 Western Australia. 



Casuarine,e. 

 Casuarina Decaisneana, F. v. M. 



