MR. J. BALL’S SPICILEGIUM FLORH MAROCCANZ. 301 
Canary-Island species, the remaining one being common only to 
Madeira and Western Marocco. It is true that the short list of 
fifteen species might be somewhat extended if we added certain 
species peculiar to Marocco but closely allied to Canary-Island 
endemic species. Sucha list would include three cactoid Euphor- 
bias, a Sonchus (S. acidus, nearly allied to S. pinnatus), a Senecio 
of the Kleinia group, and Monanthes atlantica, nearly allied to its 
Canary-Island congeners. 
It must be remarked, however, that the types to which these last- 
mentioned species belong are rather generally West-African than 
specially Macaronesian, as all are common to the Cape de Verde 
Islands, if not to a wider region. Of the fifteen Macaronesian 
species found in the coast region of South Marocco, I think it is 
safe to say that the facts rather tend to show the accidental dif- 
fusion of a few Macaronesian species on the adjacent coast of 
Africa than to indicate the existence of a direct connexion be- 
tween the continent and those islands within a geological period 
at all recent. 
There remains to be considered the flora of the Great Atlas, 
the only one of the constituent portions of the general Marocco 
flora that seems to be confined within the boundaries of the em- 
pire. I am tempted to enter into some detail in discussing this 
part of my subject; but when I recollect what a large mass of 
additional unpublished matter is already in the possession of my 
friend M. Cosson, [ feel that it would be unsatisfactory to attempt 
any such detailed discussion at the present time; and I hope to 
be able to resume the subject to greater advantage on a future 
occasion. 
In the mean time it is allowable to point out some character- 
istic features of the Great-Atlas flora, as far as this is known to 
me from our collections. Dividing the mountain region into two 
zones, an upper and a lower one, and fixing the limit between 
them at about 1500 metres above the sea-level, I find in each of 
these a considerable number of endemic species, amounting in 
regard to the upper zone to about one fourth of the whole number 
of species. But there is little indication of that multiplication of 
specific forms that is so characteristic of the mountain-florag of 
along with the Canary-Island archipelago. Though the flora of Madeira be 
more limited than that of the Canaries, it is impossible to regard it as other 
than a detached member of that group. 
