Sangha trees

Sangha trees an identification and training guide to the trees of the northern Republic of Congo... 

Figure 11.1 Map of sub-Saharan Africa showing the Republic of Congo and regions covered by the nearest recent Fioras. The black square shows the approximate extent of the Sangha Trinational Landscape, the area covered by Sangha trees (Harris and Wordey, 2008).

Trinational Landscape and elsewhere, a field manual to the trees of the area, Sangha trees (Harris and Wortley, 2008 on which this chapter focuses) and a complementary database of digital images, available both on CD-ROM and on the World Wide Web. 

Figure 11.2 Example species covered by Sangha trees. (A) Zanthoxylum tessmannii ... 

The third and, perhaps, most obvious, decision to be made regarding a new field guide is the broad issue of design. There are a huge niunber of questions to be answered (discussed in much more detail in Lawrence and Hawthorne, 2006), but a few of those that were considered for Sangha trees are listed below ... 

Figure 11.3 Layout of Sangha trees, example pages from Leguminosae. Reproduced with permission from Harris and Wortley (2008).

For simplicity this chapter makes an artificially clear-cut distinction between design and process. In practice the design of a field guide develops as the process goes on, and the process simultaneously evolves to suit the changing end-product. For Sangha trees, the production process was broadly as follows. 

The total cost of producing Sangha trees is estimated at c. 150 000. One essential factor in estimating costs is a realistic assessment of the number of species to be covered, which will proportionately affect each of these costs in turn. One of the main obstacles in writing Sangha trees was an initial underestimation of the number... 

Sangha trees an illustrated identification manual. Edinhurgh Royal Botanic Garden Edinburgh. 

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