The combination of tropical heat and rain in the alternate regions of forests and brushwood swamps produces a tropical growth of cocoa palms, cotton plants, flax and fibrous trees, and rubber vines in prodigal luxuriance and variety. The virgin forests are tropical to a height of about 1,000 m., when they become less dense, and the oak ferns make their appearance. Between 1,500 and 1,800 m. the wild coffee shrub grows abundantly, the oak ferns disappear, and are succeeded by glades and brushwood. At an altitude of 2,200 m. the forest suddenly comes to an end and the grass land begins. Only in the ravines, in which the soil is moist and sheltered from the winds, the forest continues to the 2,700 m. level. The high forest--the most magnificent of all tropical forest formations--is characterised by its amazing variety of entirely different trees, including, among others, the great wool tree, the mahogany tree, the yellow and red wood trees, the oil-palm, and rubber. Among the trees of the brushwood districts the principal are acacias and the oil-palm, which to a height of from 700 to 900 m. covers the slopes of the Cameroon plateau to the coast. The chief planting activity appears to have been at Johann-Albrechts-Höhe, and in the Dibombari district on the Northern Railway. A forestry plantation at Manoka, near Duala, was abandoned on account of its remoteness, the difficulty of water supply, and the constant lack of labour. The principal work for the making of forest and state reserves has been conducted in Yabassi, Yaunde, Edea, and Dschang. The efforts of the forest department and of private persons have been concerned mainly with: (_a_) Investigations of woods suitable for beams, wharves, and for boat and waggon building; (_b_) trials of woods resistant to _teredo navalis_ for small boats; and (_c_) experimental shipments to German South-West Africa of woods serviceable for building, mining and street paving.