20 
Fruit almost hemispherical, rarely '2 lines diameter, the orifice open or almost dilated, the rim 
narrow, the capsule slightly sunk but very convex in the centre, the valves protruding when 
open. (B.H. iii, 223.) 
With regard to the varying descriptions of the bark of this species, see 
" Bark." 
Botanical Name. Eucalyptus, already explained (see Part II, p. 34) ; 
microtheca, from two Greek words, micros, small, and tfake something to put 
anything else in hence, in hotany (amongst other technical meanings) a capsule- 
hence a small fruit, for this species has one of the smallest of all Eucalyptus fruits. 
Vernacular Name. This is the true Coolabah of the aborigines, variously 
spelt Coolybah, Coolibar, Coolybar. The name has been persistently though 
erroneously attached to at least two other trees Eucalyptus bicolor A. Cunn., the 
Black or Flooded Box, and one at least of the so-called Apples (Angophora). 
" Flooded Box," Gulf of Carpentaria. " White Gum" in Western Australia, 
where its bark sometimes looks as if it had been whitewashed. 
Aboriginal Name. " Coolabah " is the aboriginal name, and has been 
adopted by the white man ; "Tangoon " of those of the Riverina, N.8.W. (K. H. 
Bennett) ; " Jinbul " and " Kurleah " of those of southern Carpentaria (B. Palmer). 
/ 
Synonym. E. brachypoda Benth. non Turcz. ; see B.F1. iii, 223. I have 
reinvestigated the matter from the original material in my " Critical Revision of 
the genus Eucalyptus," Part xi, p. 51, and have arrived at the same conclusion as 
Mueller in his " Eucalyptographia." 
Leaves. The leaves of this tree are commonly glaucous, or at l3ast pale- 
coloured, and the venation well marked. 
Fruits. The very small fruits with exserted valves are usually quite suffi- 
cient to distinguish this species. 
Bark. The bark of this tree, as we in New South Wales know it, is rough 
and persistent, more or less fibrous and even scaly on the trunk, with usually smooth 
bark on the limbs. 
Mueller, however, described the tree (type from the Northern Territory) 
as . . ^ . " with a dirty brownish- white bark, full of wrinkles and cracks, 
persistent on the trunk, deciduous on the upper branches, leaving them ashy white." 
Bentham (B.F1. iii, 223) quotes Oldfield, as regards the Murchison River, 
W.A., . . . "who remarks on the variability of the bark, but there appears 
to be some confusion in his notes." There may be no confusion. 
Western Australian trees are so different, as regards the bark, to New South 
Wales and Queensland (not far north) trees that, familiar as I am with the latter, I 
did not recognise E. microtheca (a White Gum) in the Murchison district, W.A., 
when I first saw it, and had to examine the twigs. Here is an instance in which 
