Digest 417 lists 16 lesser known species of timber that show potential for new or wider application in construction. This set of Digests gives the results of tests carried out on each of these species and also recommends end-use applications for each of them. Part 1 describes the technical assessment methods used. Subsequent parts describe in detail the findings and recommendations for each type of timber. Part 3 gives results and recommendation for andiroba, dahoma, gmelina, American red oak, Tanzanian plantation teak, and vitex. 16 pages.