274 AUSTRALIAN NATIVE PLANTS. 
The essential oil is pale-yellow to reddish-amber in colour ; 
it smells and tastes like that from LZ. odorata; is of 0.918 specific 
gravity, and boils at 137° to 181° F. ° (Wittstein and Mueller.) 
Plants grown on high ground give an oil of a dark amber 
colour, possessing an agreeable aromatic flavour, and having the 
odour of caraways. The yield from 1oolbs. of the fresh gathered 
leaves was 10z. 6drs. The plants grown on low marshy soil 
yielded an oil of a pale-yellow colour, in appearance and smell 
similar to that yielded by Z. odoraéa, the quantity being g$drs. to 
toolbs. (Bosisto, Zrans. R.S., Victoria, vol. vi., 1861-4.) 
South Australia to Northern Queensland. 
27. Eucalyptus Staigeriana, 7.v.17., N.O., Myrtacez, Bailey in 
Synop. Queensland Flora, 
‘“‘ Lemon-scented Ironbark.” 
The leaves possess an odour very like the scented verbena 
(Lippia citriodora), and yield an oil similar to the verbena oil 
(from Andropogon citratus) of commerce. Mr. Staiger found the 
dried leaves to yield 2% to 3 per cent. (other figures give 129002. 
to 1 ton of dry leaves) of volatile oil of specific gravity .gor. Later 
experiments fix the specific gravity at .871, while Messrs. Schimmel 
& Co., of Dresden, give the specific gravity 0.880, and boiling point 
from 170° to 230°. 
It is said that the yield of oil from this Eucalypt is only 
exceeded by one other species, viz., £. amygdalina, and the 
yield is only very slightly in favour of the latter. Compare Back- 
housta citriodora. 
Queensland. 
28. Eucalyptus uncinata, Zurcz., (Syn. £. leptophylla, Miq.; 
E. oleosa, F.v.M. (partly) ; N.O., Myrtacez, B.FI., iii., 216. 
A ‘' Mallee.” ‘‘Gunamalary” of the aboriginals of the Lake Hind- 
marsh Station (Victoria). 
Baron Mueller found that rooolbs. of twigs of this tree (com- 
prising, perhaps, 5oolbs. of foliage) yielded 69 ozs. of essential oil. 
West and South Australia, Victoria and New South Wales. 
29. Eucalyptus viminalis, Zad¢//., N.O., Myrtacee, B.FI., iii., 
239. 
