364 R. T. BAKER, 
The characteristic features of each species are shown in 
the macroscopical and microscopical illustrations. The 
most remarkable will be seen in the transverse sections, 
which show the rays dividing the other wood elements 
into segments, which have their concavity outwards, i.e., 
towards the bark, an arrangement which is now found 
to obtain in all the genera of Proteacese except Persoonia. 
In no other Family was this found in any timbers ex- 
amined, not even the Casuarinacez, which has equally 
as large rays as the Proteacez. “The small globular 
bodies found in the wood elements of the several species is 
a unique feature in timbers and has taxonomic value, in 
which direction can also be used the disposition of the fibres 
and wood parenchyma in the several species, and this should 
aid specific determination. 
This paper covers investigations on the timbers of the 
following species:—Grevillea robusta, Silky Oak; G. Hilli- 
ana, Red Silky Oak; Embothriuwm Wickhami, Satin Silky 
Oak; Cardwellia sublimis, Bull Silky Oak; Orites excelsa, 
Pink Silky Oak. , 
Acknowledgments.—I am indebted to Mr. T. C. Roughley 
for the section cutting, autochromes and microphotographs, 
and to Mr. D. Cannon and Mr. F. Shambler for botanical 
and timber help respectively; and also to Mr. C. T. White, 
N. W. Jolly B.A., B.Sc, and Mr. H. W. Mocatta for some 
Queensland botanical material. 
GREVILLEA RopusTa A. Cunn., Silky Oak, (B. Fl. v, 459). 
Remarks.—This was probably the first tree to receive the 
name of Silky Oak, or at least the name was first associated 
with this species, and it has been customary by the un- 
initiated, to give the name Grevillea robusta to every 
timber in the Sydney market called commercially Silky Oak. 
