September, 1939 
68 The Queensland Naturalist 
the portion are Swamp Mahogany ( Tristania suaveolens ) 
which is very frequent and Scrub Box ( Tristania con - 
ferta) . The Blue Gum, Poplar Gum, Ironbark, and Swamp 
Mahogany are sometimes found in pure stands. On flats 
pure stands of Blue Gum, Poplar Gum, and Swamp Maho- 
gany often occur. Ironbark in pure stands is mostly seen on 
ridges. Mixed communities of these forest trees are much 
more general. Swamp Mahogany and Blue Gum often oc- 
cur together on flats and slopes. Poplar Gum and Blood- 
wood occur on flats and hillsides alike. Cabbage Gum is 
sparsely scattered throughout the forests on flats and 
rises. Ironbark and Narrow-leaved Ironbark grow on 
ridges mixed with Bloodwood and Poplar Gum. The 
Stringybark, Scrub Box, and Silver-leaved Ironbark are 
the forest trees which show the greatest degree of select- 
iveness in the soil in which they grow. The Stringybark 
and Scrub Box were always seen on dry, highly siliceous 
soils in association with Grass Tree ( Xanthorrhoea media). 
They are not very common trees in the area and were ob- 
served on the Mt. Funnel Range and in the Southern 
part of the coastal portion between West Hill and Flaggy 
Rock. The Scrub Box is commonly found in Southern 
parts of the State on the edges of rain forests. 
In the Sarina — Flaggy Rock district, the species 
has a very different environment. The Silver- 
leaved Ironbark is also found in dry siliceous 
soils or in rocky situations; it is also an indication of 
a fairly low rainfall. It is not very common in the 
coastal portion, and was seen in the Southern half towards 
and on Mt. Funnel Range and in the rocky country be- 
tween Carmila and Flaggy Rock, where it was most plenti- 
ful. It is interesting to note that the part between Carmila 
and Flaggy Rock has the lowest rainfall (47 inches) of 
the coastal portion. 
The Eucalypts and the Swamp Mahogany are inter- 
mixed with the Tea Tree (Melaleuca Leucadendron var. 
Cunninghamii) on flats and gradual slopes. The Poplar 
Gum, a tropical species, is the most prevalent Eucalypt in 
the coastal portion. Bloodwood, Blue Gum and Ironbark 
are also frequent. Apart from the generalisations given 
above, it is difficult or impossible to place limits on the 
local distribution of individual species of Eucalypts or 
the other forest constituents. It is evident that most of 
these species possess in a high degree the power of adapt- 
ing themselves to different kinds of soil. 
Other constituents of the Flat and Hill Associations 
