QUEENSLAND RAIN FORESTS AND TREES. 215 



Trees ivilh \'i tij Si)iooth, Tliin Bails. — The ironwoort 

 [Mijiius Ilillii) and the giant ircuwood {Sijncarpia suh- 

 argentca) have very smooth, thin barks. The bark of an 

 ironwood 10 inches in barrel diameter measured iV-i^c^^ 

 thick ; and that of a giant ironwood 3 feet in diameter ^-inch 

 thick. In both trees the surface of the bark is often bright- 

 green or briglit-brown. The ironwood rarely exceeds 10 

 inches in barrel diameter. The marara {^Vei)nnann^a 

 lacJniocarpa) has a thin but not very smooth bark, whicli 

 measures j^^-inch on a tree with a barrel diameter of 2 feet 

 3 inches, and which is generally deep-red when cut. 



Trees with Yellow Imi,- r Barls. — The following trees 

 have yeHow inner barks : — Black bean or ^loreton Bay 

 chestnut (Castano^pei'iinoii austrah), lignum-vita? {Vifex 

 lignuin-vita), blueberry ash {Elieocarpus obovatus), moun- 

 tain beech {EJa-ocarpus Kirtonii), (|uandong or blue fig 

 {Ekeocarpns grandis)^ Elaocarpiis foveolatus, Eheocarpus 

 runiiiiaius, and Elaocarpus sfvicopeiahis. The species of 

 Eheoccu pus generally have a yellow surface on the sapwood, 

 Vihich IS seen when the l)ark is removed. This peculiarity is 

 often a well-marked one. and proved serviceable to the 

 writer recently in locating specii s of Eheocarpus in the 

 Eungella Range. The inner surface of the bark in these 

 trees is generally similarly tinted. It was noticed in the 

 case o£ the blueberry ash that after some hours' exposure the 

 yellow colouratinji turned to a bluish tint. 



Trees with 0( hrr-CoJoured Inner Barls. — At least two 

 species of trees of the natural order Cela.sfriiiew — namely, 

 the ivorywood (Siphonodou au.strale) and the orange bark 

 [Celasirus dispoDUis) — have very distinctive inner barks. 

 When the outermost layer of bark is removed an inner la^^er 

 of an ochre-yellow or brown colour is exposed in the ivory- 

 wood and an orauge-colonred layer in the orange bark. 

 This peculiarity of these two trees was pointed out to me by 

 bii^hmen and otheis. Somewhat similarly coloured inner 

 binks may be found in other species of this natural order. 



Trees iritli a Vvrinl-led Surface on the Sapwood. — A 

 large number of trees of the natural order Sapindacea' and 

 a few of the natural order Laurinrw have a peculiar 

 wrinkled surface on the sapwood which is seen when the 

 bark is removed. The wrinkles are disposed longitudinally 

 and suggest the appoai'ance of ccrduroy cloth, or in coarser 



