42 
and in the lower part, with young red pine. This forest is not so 
dense as that on the side of lake Yamanaka owing to the lack of 
the underground water, (cf. Map.) 
On the south-west side, the Aogigahara lava corues down 
almost to the base of the mountain, and being nourished by the 
underground water, is covered by the dense coniferous forest of 
Picea, Tsuga and Abies. 
Fig. 13. The Aogigahara forest at Shoji lake; the forest of the lake-side is seen in the back 
ground. (Photographed by the author). 
Generally speaking, all parts of the prairie-region have 
nearly the same plants. But when we consider the patches of 
forest which are found isolated in the prairie, some differences 
may be observed. On the southern flank, some deciduous broad 
trees come down into the prairie making patches here and there 
mostly along the valley and give some variety to the monotonous 
scenery on this side ; but on the northern flank, red pines play the 
part that the broad leaved trees take on the south. On the south, 
there is no group of pines on the prairie, nor is it likely that any 
