272 AUSTRALIAN NATIVE PLANTS. 
21. Eucalyptus obliqua, LT Herit., N.O., Myrtacee, B.FI., iii., 
204. 
Variously called “ Stringybark,” “ Messmate,” ‘Black Box,” and 
“Tronbark Box.” (For synonyms, see ‘‘ Timbers.’’) 
The essential oil is reddish-yellow, of mild odour, and bitter 
taste. Sp. gr., 0.899; boiling point, 171° to 195°; it becomes 
turbid at 18°. (Wittstein and Mueller.) 
Southern coast districts of New South Wales, but chiefly in 
Tasmania, Victoria and South Australia. 
22. Eucalyptus odorata, Behr., (Syn. 2. porosa, Miq.; £. 
cajuputea, Miq.); N.O., Myrtacez, B.FI., iii., 215. 
Variously called ‘‘ Peppermint Box” and “‘ Red Gum.” 
Baron Mueller found that rooolbs of twigs of this tree (com- 
prising, perhaps, 5oolbs. of leaves) yielded 11230zs. of essential 
oil. Bosisto (Zrans. R.S., Victoria, vol. vi., 1861-4), however, 
gives the following figures :—1oolbs. of leaves from trees growing on 
elevated spots yielded 40z. 13drs. of oil, of specific gravity 922, 
while the same quantity of leaves from trees growing on low, 
swampy lands, yielded only 54drs. of oil of specific gravity .899. 
It is pale-yellowish, with a greenish tinge, and an aromatic, some- 
what camphoraceous smell. It boils between 157° and 199°. 
South Australia, Victoria, and New South Wales. 
23. Eucalyptus oleosa, “.v.17., (Syn. £. socialis, F.v.M.; £. 
turbinata, F.v.M., et Behr.); N.O., Myrtacez, B.FI., iii., 248. 
A “ Mallee.” 
Baron Mueller found that 1ooolbs. of the foliage of this tree 
(of which perhaps half the weight consisted of branchlets) yielded 
6240z. of oil (Mr. Bosisto’s figures are 2002. of oil from troolbs. 
of the green leaves and branchlets), of ‘g11 specific gravity, at 70° 
F., boiling at 341° F., and of rather a pleasant mint-like and 
camphoraceous odour, and yellowish colour. (Later experiments 
give the specific gravity at *904.) 
