Brassicaceae interactive key
Courtesy of Ihsan Al-Shehbaz
Powered by: NaviKey v. 5.0
To run NaviKey, Java™ Runtime Environment needs to be downloaded and installed first.
Unfortunately NaviKey is considered too insecure to be run as an applet in your browser since Oracle Java™ RTE 8. To use the interactive key inspite of this, you have to put this site's URL into the exception list of your Java installation.   
To run the interactive key locally on your computer you can download it from here.