Who is the key designed for?
The key has been kept as simple as possible so it can be used by both the experienced and inexperienced. We have attempted to keep it non-technical and, on the whole have tried to score genera as a non-expert would (flora features like the presence of a perianth are an exception). The key uses mainly non-flower and fruit characters, so that it can be used to identify sterile plants, as these are the hardest to identify for expert and non-expert alike. In some cases, the key will not allow you to reduce the list to a single genus, but will take you to a group of related and very similar genera. Once you have a list of half a dozen genera, the images should allow you to identify a genus in most cases.