British ferns (Filicopsida)

DELTA home

L. Watson and M. J. Dallwitz

Interactive keys and information retrieval

Which program should I use?

Intkey requires separate downloading and installing of a program (app). The Navikey program is automatically downloaded and run whenever you run the key.

The original version of Intkey (CSIRO Entomology) runs only in Microsoft Windows. A later version of Intkey (OpenDelta, ALA) works in Windows and Mac OS X, but requires the installation of the Java Runtime Environment (JRE). Navikey also requires the JRE.

Both programs are easy to use, but Intkey has many extra features that will help you make accurate identifications, including:

DELTA home

Using Intkey

If Intkey is already installed on your computer, you can start the key.

Intkey is available at delta-intkey.com/www/programs.htm. With a broadband connection, installation of the CSIRO version (which runs only on Microsoft Windows) takes about 1 minute. The size of the download is about 2MB, and the size of the installed program is also about 2MB.

NaviKey home

Using NaviKey

NaviKey requires the Java Runtime Environment (JRE) Version 1.5 or later, which is available for computers running Windows, Linux, Solaris, and Mac OS X.

If Version 1.5 or later of the JRE is already installed on your computer, you can start the key.

To install the JRE, go to http://www.java.com/download (Windows, Linux, Solaris) or http://www.apple.com/java (Mac OS X). With a broadband connection, installing the JRE on Windows takes about 2 minutes. The size of the download is about 7MB for Windows, 18MB for Linux and Solaris, and 80MB for Mac OS X. The size of the installed program is about 75MB on Windows.


The complete package (key, descriptions, and illustrations) is available on DVD.


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