Viewing the general distribution of Banksiae, it is a singular fact in the geographical history of this genus, that its species, which have been traced through almost every meridian of the South Coast, upon the islands in Bass Strait, in Van Diemen’s Land, and widely scattered throughout the whole extent of New South Wales to the North Coast, at which extreme of the continent, B. dentata has been observed as far west as longitude 130 degrees East, should be wholly wanting on the line of North-west Coast.  Why the links of this almost perfect chain should have been broken on the seashores appears unaccountable, since they are, by reason of their general sterility and exposure, extremely favourable to the growth of the greater portion of the order.  Our limited knowledge of the West Coast (properly so called) does not afford us materials to hazard even a partial conclusion, relative to the existence of this family on its shores, excepting from the total absence of any one plant of Proteaceae at those parts of Rottnest and Dirk Hartog’s Islands visited during the Bathurst’s voyage; an inference may be drawn of the general paucity of any part of the order on the shores of the neighbouring main.  Although no species have been found common to shores opposite to each other, in the higher latitudes, the identity of Grevillea mimosoides, Persoonia falcata, and Hakea arborescens, has been established upon the East Coast, and the north-western shores, in the parallel of about 15 degrees South:  but whilst this geographical diffusion has been remarked in reference to those particular species, the range of Grevillea gibbosa, a plant discovered at Endeavour River by Sir Joseph Banks, is now tolerably well defined by observations made during the late voyages, from which it appears to be circumscribed to an area not exceeding one hundred and twenty miles on the East Coast.  In the course of the progress of the land expedition above referred to, the discovery of another plant of this natural order by Mr. Fraser, occurred in New South Wales, in a tract of country west of the coastline, about the parallel of 31 degrees, where I am informed it is a timber-tree of very large dimensions; and seemingly it constitutes a new genus, nearly allied to Knightia of Mr. Brown, a native of New Zealand, as I judged from a casual view of some specimens.

LABIATAE and VERBENACEAE.  The mass of these orders (which are admitted to be very nearly allied to each other) seems in Australia to exist on its eastern coast, within and beyond the tropic, and the species in the collection lately formed, are referred to ten established genera, of which (as belonging to Verbenaceae) Vitex and Premna are most remarkable on the North-western Coast.

Of Labiatae, a new species of Labillardiere’s genus Prostranthera was discovered upon Dirk Hartog’s Island, where, as also at Rottnest Island, Westringia was observed, of species, however, common to the South Coast.