Chapter VII. 
present marshy levels are the result. Lake Bujukii is a 
survival of one of these ancient basins. 
In the Mobuku and Bujuku Valleys towards 10,000 feet 
the damp and mild climate specially favours the development of 
i 
SENECIO AND LOBELIA STUHLMANNI. 
lycopodium, mosses, and lichens which clothe the sides and 
bottoms of the valleys, and cover the trunks of the living 
trees or of those that have fallen from old age. At this 
height the valleys are clad with a dense forest of heaths and 
228 
