S5 
Botanical Name. Eucalyptus, already explained (see Part II, p. 34) ; rubida, 
Latin, reddish. It frequently exhibits' reddish or plum-coloured patches on the bark, 
hence the specific name. - 
Vernacular Names. Known as " Flooded Gum " at Queanbeyan, Michelago, 
Cooma; sometimes known as " Bastard White Gum," " Ribbony Gum," and " Droop- 
ing Gum." The name " Candle-bark " in use in the Queanbeyan district is in reference 
to its smooth and glaucous trunk ; it is very descriptive of the tree e,s seen in much of its 
range, and might be adopted for the vernacular, as the others are already appropriated. 
It has usually reddish or plum-coloured patches on the bark, hence the occasional name 
of " Spotted Gum." Sometimes the bark is, however, of a yellowish cast (the tips of 
the twigs being also yellowish), and hence between Goulburn and Moss Vale it is one of 
the trees known in the district as " Yellow Gum." We have also noticed the species 
to have a yellowish bark between Delegate and Bombala ; while a label in the National 
Herbarium, Melbourne, shows that the species at St. Vincent's Gulf, S.A., is also known 
as " Yellow Gum." 
It is also known as " Manna Gum," and is perhaps the principal species of 
Eucalyptus yielding that substance. Although the name " Manna Gum " is so largely 
applied to E. rubida, it would appear not desirable to encourage the use of it as a definite 
name, since E. viminalis is so well known by that name. Incidentally, it may be stated 
that E. rubida is one of a number of species which masqueraded under the name of 
E. viminalis. 
Aboriginal Name. It is the "Bak-bak" of the aborigines of the Upper 
Murray, according to the late Lady Hay. See p. 106. Such a precious tree to the 
blacks has doubtless other names in various districts, but I do not know of them. 
Synonyms. This was long looked upon as a form of E. viminalis, and its 
smooth bark, and its yield of Manna, lent colour to that view. The name E. mannifera 
Mudie and A. Cunn., which is very freely quoted in old books, is of course in reference 
to this manna-producing quality. For other synonyms, see my " Critical Revision of 
the Genus Eucalyptus," Part XXVI, p. 111. 
Leaves. The point I desire to invite the attention of my readers to in regard 
to this species, is that the sucker-leaves are nearly as round as half-a-crown, and they 
are white as if dusted over with flour. The sucker-leaves of Eucalyptus viminalis are 
sharply different in this respect. The exudation of manna from the mature leaves of 
this species is referred to at length at page 107. 
Flowers. Note that, in the typical form, the flowers are in threes, and 
arranged in the form of a cross, but this is by no means always the case, particularly 
n specimens from northern New South Wales. 
