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Vernacular Name.— The name “ Yiel Yiel ” or “ Yill-Gill ” is applied to 
several proteaceous trees, e.g., Stenocarpus sinuatus and Grevillea robusta, as well 
as to G. Hilliana. I suggest the name “White Yiel Yiel” for G. Hilliana in 
allusion to the colour of the timber and silvery appearance of the underside of the 
leaves, though whether the name is original on my part I do not remember. 
“ Silky Oak ” is a name also applied to this tree in common with many others of 
the Proteacem. 
Aboriginal Name. —“ Yiel Yiel ” (the name is variously spelt) is a name 
of aboriginal origin applied in northern New South Wales and in Queensland to 
proteaceous trees, as already indicated. What the meaning of it is, or to what 
extent it had definiteness with the aborigines, I do not know. 
Leaves. —Belotv see a note on some leaves which are very piunatifid. 
Those figured in the drawing are not so, and the plate represents the leaves as 
ordinarily observed in this species. Particularly as regards the Proteacem, we 
want plenty of field observations in regard to variation of organs yet. 
Timber. —Hard, durable, and beautifully grained ; used for coopers’ work, 
cabinet work, veneers, &c. It is, however, but very little known, being usually cut 
up and mixed with the timber of two other Silky Oaks— Grevillea robusta and 
Orites excelsa. 
Size. —A tree of 50 or 00 feet, and with a diameter of 2 or 3 feet. 
Habitat. —This tree is confined to Queensland and the Northern Rivers of 
New South Wales. Following are the localities given in the Flora Auslraliensis : — 
Queensland. —Brisbane River, Moreton Bay (\V. Hill, F. Mueller); Rockingham Bay (Dallachy). 
New South Wales. —From the Clarence to the Tweed River (C. Moore). 
Mr. P. M. Bailey, in his “Queensland Flora,” adds “ Logan and Albert 
Rivers” (Hill). 
A Queensland specimen in the National Herbarium, Sydney, bears the label 
in Leichhardt’s handwriting, “ Dinnangurumbin B.B. Brush, ISth Sept., 1S43.” 
The precise locality could doubtless be traced by perusal of Leichhardt’s journals. 
This specimen was labelled G. Hilliana by Mueller himself. Its leaves are very 
pinnatifid, are in leaf only; and I cannot say from the material alone whether it is 
different from G. pinnatifida, Bail. 
New South Wales specimens in the National Herbarium, Sydney, are :— 
Mullumbimby, Brunswick River (W. Baeuerlen), and Casino, Upper Richmond 
River (Forester W. P. Pope). 
