East African Quality Classes for the Cypresses of the C. Lusitanica Group

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Date
1945
Authors
Griffith A. L.
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Abstract
THE exotic cypresses of East Africa extend from the West Nile District of Uganda in the North to the Southern Highlands of Tanganyika in the South (a distance of some 800 miles), and from West Uganda to the Usambara Mountains of East Tanganyika (a distance of some 600 miles). The plantation sites vary in elevation from about 6,000 to 9,000 feet, and in rainfall from about 25 to 60 inches. This area includes the equator, and the plantations are situated to the North and South of it. In general, in the climate, there is little difference between summer and winter, the day is twelve hours long all the year round and there is no dormant growth period. Owing to these conditions, and the fact that a number of cypresses have been introduced from various parts of the world and put side by side, extensive hybridisation occurs and one cannot trust local seed. The identification of this group of cypresses is difficult and with hybridisation almost impossible, and that is why we regard them (c. lusitanica, C. benthami, C. lindleyi, etc.) as a group, though the majority are probably largely C. lusitanica. The "nigger in the wood pile" is C. macrocarpa, for we have the cypress canker fungus Monochaetia llnicornis, which is death to the Monterey cypress, and any hybridisation between C. macrocarpa and the C. lusitanica group renders the latter susceptible to the canker.
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East African Agricultural And Forestry Journal, p. 117-118