154 
Stamens. —Attaining 4 or 5 lines; anthers ovate, with parallel distinct cells opening longi¬ 
tudinally. 
0 vary. —Flat-topped. 
Fruit. —Ovoid urceolate, usually about ^ inch long, and nearly as much in diameter, the rim 
narrow, the capsule deep sunk (B. FI. iii, 258). 
A variety of the Spotted Gum, found in Queensland, has leaves of a citron 
or lemon scent, and is hence called Citron or Lemon-scented Gum. It was 
formerly called E. citriodora, Hooker; its name is now var. citriodora , E.v.M. 
Mueller (Eucalyptographia, under E. maculata), thus speaks of it: 
Fj. cilriodora can only be considered a variety of E. maculata, differing merely in the exquisite 
lemon-scent of its leaves, and holding as a variety precisely the same position to E. maculata as Boronia 
cilriodora to B. pinnala, or Thymus cilriodorus to T. Serpyllum. Mr. Bailey, who had opportunities to 
compare the two trees promiscuously growing, confirms their specific identity. 
Some writers prefer to retain cilriodora as a species, just as nurserymen do, 
because of the perfume of the oil. It has been pointed out, over and over again, 
that an adaptive character, like oil, cannot be used for specific determination. In 
the present instance, however, I pointed out some years ago (and since then have, 
over and over again, repeated the observation), that the young foliage of E. maculata 
very commonly exhibits the citriodora odour when crushed in the warm hand. In 
fact, species and variety run into each other. 
Botanical Name. —Eucalyptus, see Part II, page 34 ; maculata , Latin, 
“ spotted,” in allusion to the bark. 
Vernacular Name. —Its almost universal name is “ Spotted Gum.” 
Occasionally one hears the name “Mottled Gum,” which has the same meaning. 
The varietv citriodora goes by the name “ Lemon-scented ” or “ Citron-scented 
Gum.” 
Aboriginal Names. —“Yah-ruigne” was the name of the aborigines of 
the Illawarra, and “ Booangie ” of those of Cumberland and Camden, N.S.W., 
according to the late Sir William Macarthur. Mr. Eorester Allan tells me that 
“Tliurraney” was the name used by the South Coast blacks. “Urar” is a Brisbane 
name, according to T. Petrie. “ Kangar ” is a name employed by Queensland 
aborigines to denote the variety citriodora. 
Leaves. —Elastic threads in Eucalyptus. 
I was so much interested with the nature and behaviour of a leaf of Eucalyptus citriodora, which I 
picked yesterday, that I send you the specimen I dealt with, which I have mounted on the paper. When 
I broke the leaf, which was about 3 inches long, across the midrib, T found that there was an attachment, 
as of a thread or filament, at each of the outside edges of the leaf. On drawing apart the two broken 
pieces of the leaf these two threads still held on, and I slowly drew them out, when, besides stretching out 
like a thread of india-rubber, they gradually separated or unravelled from the edges of the leaf, both at 
the stalk end and at the tip of the leaf. The threads were so elastic that I drew them out to the length 
of fi] and 7| inches respectively before they broke, and they then curled up like a piece of india-rubber 
cord when the strain is taken off, and they now, after twenty-four hours, retain their elasticity. ( Gardener a 
Chronicle, February 7, 1903, p. 92.) 
