310 
NATIVES OF OBBO. 
[chap. yiti. 
very perceptible inclination. The vegetation of Obbo, 
and the whole of the west side of the mountain range, 
is different from that upon the east side; the soil is 
exceedingly rich, producing an abundance of Guinea 
grass, with which the plains are covered. This country 
produces nine varieties of yams, many of which grow 
HEAD-DRESS OF OBBO(l) AND SHOGGO (2). 
wild in the forests. There is one most peculiar species, 
called by the natives “ Collolollo,” that I had not met 
with in other countries. This variety produces several 
tubers at the root, and also upon the stalk; it does 
not spread upon the ground, like most of the vines 
that characterise the yams, but it climbs upon trees or 
upon any object that may tempt its tendrils. From 
every bud upon the stalk of this vine springs a bulb, 
somewhat kidney-shaped; this increases until, when 
ripe, it attains the average size of a potato. 
