74 WILLOWS OF THE EAST INDIES. 
with certainty the following descriptions of twenty-five species, of each 
of which I have examined more or less numerous specimens. Of three 
species, published by Don and Fries, I have added the descriptions by 
these authors, as I have not myself seen specimens of them, nor been able 
to reduce them to any heretofore known sorts; and finally I have added 
the three above-mentioned additional species of Wallich’s catalogue, as 
undeterminable and doubtful. This number, however large it may ap- 
pear for a southern and tropical country, will no doubt be considerably 
augmented when Dr. J. Hooker publishes his collections made in the 
Himalayas ; they will prove more effectually than the following enume- 
ration, that the Willow has a wide extension unusual for woody plants ; 
that the species are distributed over mountainous tracts in a manner 
corresponding to climatic conditions, where they appear, if not under 
the same, yet under somewhat analogous forms. For it appears, on exa- 
mining the known East Indian Willows, that two of our alpine species, 
S. arbuscula and retusa, are quite analogous with S. flabellaris and Lind- 
leyana, which grow high on the Himalayas, where they occur either in 
a luxuriant or crippled form, as is the case with ours. On the northern 
highlands of Nipal species grow which are unequivocally related to our 
North of Europe forms: S. apiculata (cognate with pentandra), denti- 
culata (with hastata), myricafolia (with repens and sibirica, or versi- 
folia), *macrocarpa (with phylicefolia), julacea and Wallichiana (with 
Caprea) ; nay, S. Caprea, hastata, daphnoides, and viminalis themselves 
are found there, in no way varying from those in northern countries. 
To the westward, in the neighbourhood of Persia, where forms ap- 
proaching S. alba, etc., are quite common, India produces S. dabylo- 
nica, dealbata, and glaucophylla, manifestly of the group of S. alba; 
and S. dabylonica* is not rare here. It is first in the lowlands of tropical 
India, on the banks of the Ganges and Berhampooter, that species 
having a tropical type, are found, which, by their similarity in many 
respects, exhibit what may be properly called an East Indian Willow- 
group, whose representatives further oceur in the Sunda Islands and 
South China; namely, S. tetrasperma, pyrina, urophylla, eriostachya, 
psilostigma, ichnostachya, suaveolens, populifolia, calostachya, and nobilis. 
With the exception of those species, which belong to the mountains and 
highlands, and which may be met with also in similar situations of the 
Old World, all the other Indian Willows are quite peculiar to their 
countries; and if they in some instances, as just mentioned, extend 
* Sic in textu.—N. W. 
