'1 I 



uniformly hemispherical, from i\ to 3 lines in diameter; operculum variable in 

 shape, sometimes larger than the calyx, and then it is conical and obtuse, bu1 the 

 mosi common Eorm is hemispherical, surmounted with .1 very prominent beak. 



Fruit. On a slender pedicel, hemispherical, and , y ./* 



consistentlj so; rim slightly variable in ' •• 



convexitj ; valves exserted, prominenl ; 2 "*„ 



to 1 lines in diameter. 



There can be no mistaking this fruit, as it preserves its 

 one form throughout its iphical distribui 



and wherever planted in other parts of the world it is 

 one of the easiest fruits of the Genus 1 rec< >:ise. 



Habitat. Banks oi the Murray, Darling, La hlan, and Murrum- 

 Rivers and ti ibutaries, and old Rlled-in wafc 

 courses. It is known as " Murray Red Gum" 

 throughout its geographical range, 



REMARKS. This Eucalyptus, commonly known as "Murray Red Gum," is the most widely distributed 

 oftheGei the banks of almost all the rivers of the interior of the continent. In the State 



of New South Wales, howevei then to be two varietie ba ed on thi chemical constituent-, of the oil. 



Morphologically i to be alike-, but after our experience with / stricla and E. apiculata no doubt some 



uishing form or characters "ill be found thai at pre ■ nl evade detei Hon. I be tj pe is here regarded as those 

 trees found on the Murray, I achlan, and Mumimbidgee Rivers; whilst those growin c in more northern localities, 

 such as Nyngan and Broken Hill, are placed as a variety under the name oi / i 'Strata var. boreaiis. 



ESSENTIAL OIL. Leaves and terminal branchlets for distillation were 

 received from Albury, N.S.W., in September, 1899. The yield of oil was 



0-14 per cent. The crude oil was red in colour, while that of the rectified oil was 

 yellowish in tint, as is usual with Eucalyptus oils belonging to this group. The 

 oil contained a small amount of phellandrene and some cymene. A small quantity 

 of cineol was present, but not more than 8 to 10 per cent, in the crude oil. The 

 presence oi aromadendral was well marked, and it was to the occurrence of this 

 constituent in some quantity that the high lsevo-rotation of the oil was due. 



The crude oil had specific gravity at 15 C. = 0-904; rotation a D n-8°; 

 refractive index at 20 = 1-4839, and was soluble in 2 volumes 80 per cent. 

 alcohol. The saponification number for the esters and free acid was io-6. 



On rectification 2 per cent, distilled below 173° C. (corr.). This portion 

 consisted principally of volatile aldehydes with a little acid water. Between 

 173-189°, 52 per cent, distilled; between 189 250°, iS per cent, came over, and 

 between 250-260°, 8 per cent, distilled. These tractions gave the following 

 results : — 



Firsf fraction, sp. gr. at 15 < . 0-8725; rotation a B 10-65°. 



Second ,, ,, .. = 0-8950; ,, not taken. 



Third .. ,, ,. = 0-9362; 



The higher rotation shown by the crude oil over that of the fraction dis- 

 tilling below [89 , was due to the presence oi aromadendral in the higher 

 boiling portions. 



Material oi this species for distillation was also re< eived from Haw N.S.W., 

 in November, [900. The yield oi oil was 0-28 per cent. In colour, odour, 

 and constituents this oil was similar to that of the same species from Albury, 

 the difference in the time oi year probabl} accounting for the increased yield. 

 A slighl increase m the amount oi terpenes was shown by the slightly highei 

 rotation, less specifii gravity, and an increased amount distilling below iNj° C. 



