BY J. H. MAIDEN. 509 



merely reddened by solution of iodine ; at the same time it 

 becomes partly soluble in hot ■water ; hence it appears that lerp- 

 amylum undergoes a change similar to that which occurs when 

 starch is converted into dextrin. By oxidation with nitric acid it 

 yields oxalic acid, but no mucic acid ; it is neutral to vegetable 

 colours, and is not precipitated by lead acetate, and is therefore not 

 to be confounded with the gums, &c. 



"It gave by analysis 43-7 and 43-07 carbon, 6'6 and 6*4 hydrogen, 

 agreeing with the formula Cg Hjo O5 (44-4 C. and 6'2 H.). Like 

 starch, lerp-amylum rotates the plan« of polarisation to the right ; 

 and on digestion with dilute sulphuric acid, &c., forms a crystal- 

 lisable carbo-hydrate which agrees in its properties with dextrin. 

 It is insoluble in ammonia cuprate, and is homogeneous. 



" Though the behaviour of lerp-amylum to iodine and to water, 

 and its insolubility in cupr-ammonia distinguish it from cellulose, 

 it is to be borne in mind that there are forms or conditions of 

 cellulose which are blued by iodine and dissolve in water" 

 (Fliickiger in Watts' Diet, vii., 2nd Suppl. 733.) 



Victoria and southern New South Wales. 



78. Eucalyptus dumosa, A. Cunn. (for synonyms see B.Fl.), 

 N.O. MyrtaceiB, B.FL, iii., 230. 



The " White Mallee " of South Australia. " Weir-Mallee " of 

 aboriginals, ''Bunurduk" of the aboriginals of Lake Hindmarsh 

 Station, Victoria. 



The blacks in South Australia powder the bark of the root of 

 this and perhaps other Mallees, and eat it either alone, or mixed 

 with portions of other plants. They call it " Congoo " [Proa. 

 R. S. S. A.). 



South Australia, Victoria and New South Wales. 



79. Eucalyptus Gunnii, Hook. /., (Syn. E. ligustrina, Miq.; 

 E. acervula, Hook, f.), N.O. Myrtaceee, B.FL, iiL, 246. 



In Tasmania this is known as " Cider G-um," and in South- 

 Eastern Australia occasionally as the " Sugar Gum." In the 



