Lucid3 System Requirements

In Symptoms of Diseases and Disorders, you will find an interactive key, fact sheets, descriptions, and images to aid in the identification of diseases, disorders, and insect damage encountered during surveys of palms in the United States and Caribbean. The interactive key is a Lucid3 Java Applet. Lucid3 (Lucid version 3) is software for creating and using interactive identification keys. Lucid was developed by the Centre for Biological Information Technology at the University of Queensland in Australia. Visit the Lucidcentral website for more information on Lucid and Lucid3.

HTML pages in Symptoms of Diseases and Disorders outside of the Lucid3 interactive key are viewable without the Lucid3 Applet Player and are all accessible from the home page. Please check the Lucid3 system requirements below if you would like to use the interactive key.


Operating System: Windows 2000(SP3)/XP/Vista, Mac OSX 10.4 or greater, Linux (that supports J2RE), Solaris (7, 8, 9, or 10). (Note that Lucid will run under Windows 98/ME/NT4, but these platforms are no longer supported.)

System Memory: 256MB RAM (512MB or greater recommended).

Web browser: Java-enabled web browser such as Internet Explorer, Firefox, Opera, or Safari.

This application has been tested with the following web browsers:

  • Internet Explorer 6.X, 7.X, 8.X

  • Firefox 2.0.X, 3.0.X

  • Opera 9.X

  • Safari 2.0.X, 3.1.X, 4.0.X

  • Chrome 1.0.X (not fully tested)

NOTE: Some web pages, such as fact sheets attached to items in Lucid3 interactive keys, may be considered pop-ups by certain web browsers. If your browser or an add-on application is set to block pop-ups, you may not be able to view all of the content on these pages. Additionally, some web browsers or add-on applications may block "active content" on web pages or interactive keys. To take full advantage of the information presented in this Lucid tool, please consult your web browser or add-on application's help file for assistance in disabling pop-up blockers and allowing active content.

Hard Drive Space: 50MB if running tool from hard drive (excluding space required for Java Runtime Environment and web browser).

Software: The Lucid3 interactive key will run embedded within a web browser as a Java applet Player. Java Runtime Environment (JRE) version 1.4.2 (1.5 or greater recommended) must be installed on your computer for the Lucid3 Applet Player to run successfully.

If the box above states that your Java status is version 1.4.2 or greater (from Sun Microsystems Inc.), and your computer meets the Lucid3 system requirements, you may proceed to the Lucid3 key:

Java information

If you don't see the appropriate text in the box above, if the version number displayed is less than 1.4.2, or you receive an error message stating "Java is an unknown command," you can download and install the latest Java Runtime Environment version from the Java website at

Note: Some Java versions greater than 1.5 may have bugs that affect operation of the interactive key. This can usually be cured by downloading the latest Java Runtime Environment version from the Java website.

You can verify your Java installation status by doing the following:


Type "java -version" in a Command Prompt window.

Mac OSX, Linux, Unix and other platforms

Type "java -version" in a terminal window.

Note to Macintosh users: OSX comes pre-installed with the JRE and is accessible using Safari. Ensure you have the latest version of JRE by running the software update utility. Internet Explorer version 5.2.3, which is the latest version of IE for the Mac, does not support JRE, nor does Opera. If you use Firefox, Mozilla, or Camino as your browser, there is a Java Embedding Plugin that will enable them to access JRE and run the Key. See the links below for information regarding installation, compatibility and updates for the plugin. The Java Embedding Plugin does not work with Explorer or Opera.

Information and Installation instructions for the Java Embedding Plugin can be found at:

To download the plugin go to the Java Embedding Plugin Summary at:

If Java version 1.4.2 or greater is now installed on your computer, you may proceed to the Lucid3 key:

Last updated May 2015