MOTANICAL GAZETTE 
OCTOBER, 1892. 
A preliminary comparison of the hepatic flora of boreal 
and sub-boreal regions. 
. LUCIEN M. UNDERWOOD. 
The distribution of the hepatics of boreal and sub-boreal 
fegions is becoming sufficiently understood to form some sort 
of a basis for comparative study, and while we yet have much 
_to learn even of the best studied region of northern Europe, 
and still more from the higher latitudes of Americ. and Asia, 
We can even now profitably gather some statistics and make 
‘ine of northern Siberia’, for of the interior of Siberia, Turk- 
m F, A. A. A. S., Rochester meeting, August, 1892. : 
Our knowledge of the north Asiatic flora is summarized in the ee phoma 
). Mitten: An enumeration of all the species of Musci and Pepa 
