This is the first edition of an identification key for the whole Cupressaceae. The first edition always contains some bugs or faults. We tried to eliminate them by the help of test users. However, experiences with other identification keys shows that the best key sometimes requires a new edition. Thus we would be glad to hear how you get along with the key and to be informated about mistakes, which slipped through despite all checks. Please, write us (on the following e-mail) if you have any suggestion or found some faults.