TO PRINCIPAL TIMBER TREES, ETC. 
91 
Spinifex squarrosus, Linne. 
India. Useful like the two preceding plants. Tennent remarks 
that the radiating heads become detached when the seed is matured 
and are carried by the wind along the sand, over the surface of 
which they are impelled by their elastic spines, dropping their 
seeds as they roll along. The heads are so buoyant as to float 
lightly on water, and while the uppermost spiny rays are acting 
as sails, they are carried across narrow estuaries to continue the 
process of embanking beyond on any newly formed sandbars. 
Spondias dulcis, G. Forster. 
Fiji, Tongan and Society Islands. This noble tree is introduced 
into this list to indicate, that trials should locally be instituted 
here as regards the culture of the various good fruit bearing 
species of this genus, one of which S. pleiogyna (F. von Mueller) 
transgresses in East Australia the tropical circle. The lamented 
Dr. Seemann saw S. dulcis 60 feet high, and describes it as laden 
with fruit of agreeable apple flavour called Rewa, and attaining 
over lib. weight. 
Streblus asper, Loureiro. 
South Asia. This bears a good recommendation for live fences, 
it being a shrub of remarkable closeness of branches. 
Swietenia Mahagoni, Linne. 
The mahogany tree of West India. The degree of endurance 
of this famous tree is not sufficiently ascertained. In its native 
mountains it ascends to 3000 feet. 
Synoon glandulosum, A. de Jussieu. 
New South Wales and South Queensland. This evergreen tree 
deserves cultivation in sheltered warm forest valleys of our 
colony, on account of its rose-scented wood. Some species of 
Dyszoylon of East Australia produce also rosewood. 
Tagetes glanduligera, Schranck. 
South America. This vigorous annual plant is said by Dr. Prentice 
to be pulicifugous. 
Tamarix articulata, Vahl. 
North and Middle Africa, South Asia. Of similar utility as 
T. gallica. The same or an allied species extends to Japan. 
Tamarix Germaniea, Linne. 
Europe and West Asia. Likewise available for arresting the 
ingress of shifting sand, particularly in moist places, also for 
solidifying precipitous river banks. 
