FLORA OF THE SUNDRIBUNS. 
263 
rA 
Westward only . 4 
IndxB., AiviCB. {Acacia arabic a) . . . . i 
India only {Cyamopsisj Mgle^ Ficus religiosa) . 3 
With the solitary exception of Bousa^ which is very rarely cultivated 
In Eastern Bengal, all of the species in the list are familiar plants 
in the Bengal Plain immediately to the north of the Sundribuns. This 
fact, taken in conjunction with the circumstance that for at least 
10 per cent, of the species the introduction can only have been from the 
north, points to the conclusion that all the planted species, except 
perhaps Bouea^ have been introduced from Bengal. 
This conclusion is somewhat strengthened when the distribution 
of the introduced weeds is considered, for it may be safely assumed 
that inadvertently introduced species must in most cases have 
accompanied the deliberately introduced ones. The 58 weeds present 
we find to be distributed as follows : — 
Both westward and eastward * . . . e 
Cosmopolitan in the Tropics . . • .24 
Tropics except Australia ..... 2 
Tropics except Australia and Polynesia • . 3 
Tropics except Polynesia ..... i 
Tropics of Eastern Hemisphere, Australia, Poly- 
nesia ......«• I 
Tropics of Eastern Hemisphere, Australia . . 2 
Tropics of Eastern Hemisphere, Polynesia , . i 
Tropics of Eastern Hemisphere , . . .10 
South-Eastern Asia, America . . . . i 
South-Eastern Asia, Australia, Polynesia . . 3 
South-Eastern Asia, Australia , . • , i 
India, Indo-China . * . . • • i 
India, Chittagong i 
51 
Westward only . . . • 
America only . ^ . 
America, Africa . • > 
Africa, India . . . . 
Europe, India . . • . 
Europe only .... 
The weeds, as might be expected, are much more cosmopolitan 
than the cultivated species (about 50 per cent, in place of 12 per 
cent.) and the localised, purely South Eastern Asiatic weeds are fewer 
than the localised, purely South Eastern Asiatic planted species (about 
4 per cent, in place of about 40 per cent.). In the case of the weeds 
there are no species distributed to the east but not to the west, while 
D 
