194 A. R. PENFOLD. 
of spreading out fan-like about 18 inches from the ground, a 
totally distinct feature from that of H. virgatus growing 
upright to approximately 4 feet. It also produces an 
abundance of richly honeyed flowers of a bright yellow 
colour crowded towards the tips of the branchlets. This 
viscous secretion, which readily spoils the trousers of the 
wearer passing through a field in full bloom, is also being 
investigated in this laboratory. 
HOMORANTHUS VIRGATUS. 
Material of this slender upright shrub, which is very 
widely distributed in the Northern Rivers District of New 
South Wales and Southern Queensland, was procured from 
Broadwater and Woodburn, both of New South Wales, and 
Stradbroke Island, Queensland, a total of 3254 tbs. being 
obtained. The percentage yield of crude oil averaged about 
07%, varying from 0°35 to 0°977/, the lower yield neo 
due to collection during the winter months. 
The Essential Oil. 
The essential oils obtained from the three consignments 
of leaves from localities, as enumerated, were of a pale 
yellow colour, with the exception of the Woodburn sample 
which was somewhat reddish, quite mobile, and possessed 
a pleasant terpenic odour reminding one of the oils of 
Dar wihia. 
The principal constituents, so far determined, were found 
to be d-«-pinene (up to about 807%), the balance consisting 
largely of a sesquiterpene identical with those isolated by 
the writer from other Myrtaceous oils, with small amounts 
of amyl alcohol, isovaleric aldehyde, and a paraffin of M.Pt. 
65 — 66° C. 
Experimental. 
3251 tbs. weight of leaves and terminal branchlets from 
the districts mentioned, yielded on distillation with steam 
