XVI International Botanical Congess

The interactive identification program Intkey is more powerful and easier to use than similar programs. Its features include: entry and deletion of attributes in any order during identification, calculation of the best characters for use in identification, allowance for errors (whether made by the user or in the data), expression of uncertainty by the user, notes on characters, direct handling of numeric values, including ranges and non-contiguous sets of values, retrieving free-text information, re The program and various data sets are available from the DELTA Home Page at http://biodiversity.uno.edu/delta/.