Mr. Brown, on the Proteacee of Jussieu. 23 
Genera consisting of one or very few species, and which ex- - 
hibit generally the most remarkable deviations from the usual 
structure of the order, are the most local, and are found either 
in the principal parallel, or in the highest latitude. - 
` The range of species in the whole of the order seems to be 
very limited; and the few cases which may be considered as ex- 
ceptions to this, occur in the most extensive genera, and in such 
of their species as are most strictly natives of the shores. Thus 
Banksia integrifolia, which grows more within the influence of 
the sea than any plant of the order, is probably also the most 
widely extended, at least in one direction, being found within 
the tropic, and in as high a latitude as 40°. It is remarkable, 
however, that with so considerable a range in latitude, its ex- 
tension in longitude is comparatively small: and it is still more 
worthy of notice, that no species of this family has been found 
common to the eastern and western shores of New Holland. 
- The celebrated traveller Humboldt is the first who has ex- 
f mens pointed out a remarkable difference i in the distribution of 
the species of plants. 
He observes that, while the greater number grow irregularly 
icaticnp and mixed with each other, there are some which form 
considerable masses, or even extensive tracts, to the nearly ab- 
solute exclusion of other species. Of plants growing thus in 
society, the greater number occur in the temperate zones ; and 
of these, the most decided instances will readily present them- 
selves to every botanist. I venture to add, that such as exist 
within the tropic, are found, either at considerable heights or 
on the sea-shores. - 
To this class very few of the Proteacez can be said to belong. 
Protea videres of Linnzus is the most striking example among 
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