10 
circumstances, may have given rise to a system of areas, to some 
extent botanically isolated, and each with an element of peculiar 
forms adapted to its phenomena. Thus north-east and south-west 
aspects, even on the same mountain, support markedly different 
floras, that of the latter being far less luxuriant. Tt can hardly be 
doubted that this differentiation is connected with the monsoons 
which blow from the two quarters indicated for nearly half the year 
each, with such marked influence on all vegetation. It has not, how- 
ever, been explained to the satisfaction of those who are familiar 
with the effect why the monsoons produce it. : 
It is again unnecessary to dwell on the rigorous selection that 
must have occurred during past ages among the coastal ranges of 
those forms which were adapted to survive typhoons. But it is 
only intended here to indicate some of the ecological problems 
which await students in this province, at present facts are not 
available for their full consideration nor would this be the oppor- 
tunity to discuss them. 
the order of the Genera Plantarum. 4. An enumeration of the 
species. The latter comprises (a) the Latin name, following in 
practically all cases, the nomenclature of the Index Kewensis, (b) 
the most accessible good description known, (c) the habitat and 
localities, (d) the colour of the flower where necessary, (e) the month 
of flowering. 
ummary of desiderata.—From the foregoing pages may now be 
selected the principal work which remains to be undertaken to 
advance our knowledge of the flora. 
l. The examination of herbaria containing Chinese plants and 
the extraction and publication of new Kwangtung records, 
. The exploration of the districts indicated on the map as 
unknown and the record of their flora and botanical features. 
3. The further investigation of the more accessible parts. 
4. The location of doubtful sites of old collections. 
5. The supply of habitats, colours of flowers and time of flowering, 
where missing. 
6. The compilation of a Flora dealing with the Mosses, Algae, 
Fungi and other classes of vegetation not dealt with in this volume. 
