The definitive electronic identification and information system for Australian eucalypts. Now updated to Lucid version 3.5.

EUCLID is the definitive electronic identification and information system for Australian eucalypts, which has now been expanded to include northern Australia. + Full description

Covering the morphology – habit, bark, leaves, flowers, fruits, buds, seeds and juveniles – and some geographic and ecological information, this is a simple means of naming a eucalypt plant or specimen using whatever information is available to you.

Easy to navigate fact sheets for each species include a botanical description, common name, the formal scientific name together with nomenclatural synonyms, geographic and ecological information, and notes covering relationships, distinguishing features and other species it might be confused with. This information is complemented with over 9000 high-quality colour images covering each species, illustrating all the main features of the plant, and a map showing natural distribution.

The third edition has: an additional 204 taxa; over 2200 new images; includes flowering times; type photographs for many eucalypt names; and comparative notes for discrimination of species in many large eucalypt groups.

This product has been updated to use the Lucid software version 3.5.

- Short description


This product is no longer available.

This product was updated to use the Lucid software version 3.5. For instructions on the use of the USB Flash Drive please view instructions This software is for personal use only.

For site licences please contact: or call 1300 788 000. Software remains a property of Lucid. Lucid is a trademark of the University of Queensland.

For queries contact


"How good is the key at identifying an unknown eucalypt? The simple answer is very very good… I think the bold claim on the dust cover is acceptable. EUCLID is a must have for anyone with an interest in this ubiquitous group of Australian plants."
John Clarkson, Australian Systematic Botany Newsletter 129 (December 2006)


  • Covers Angophora, Corymbia and Eucalyptus
  • Numerous images and distribution maps for each species
  • Easy-to-use interactive identification key
  • Developed from the Australian National Herbarium collection
Features in the Third Edition
  • An additional 204 taxa compared with second edition, a total of 894 taxa
  • Over 2200 new images, with more than 9000 images in total
  • Now includes flowering times
  • Type photographs for many eucalypt names
  • Comparative notes for discrimination of species in many large eucalypt groups
System Requirements
  • Java Virtual Machine v1.4.2 or greater
  • Windows 2000(SP3)/XP/VISTA/Win7/Win8 (32 or 64 bit editions of Windows are supported); Macintosh OS X 10.4 or greater; Linux that supports J2RE, such as Red Hat, SuSE, Ubuntu; Solaris 7, 8, 9 or 10
  • Note: Please note that Lucid will run under Windows 98/ME/NT4 however these are unsupported platforms
  • System memory: Windows 256MB RAM (512MB or greater recommended); Macintosh/Linux/Solaris 512MB or greater
  • Screen Resolution: Minimum of 1024 x 768 pixels
  • Web browser: Java-enabled web browser such as Internet Explorer, Firefox, Chrome or Safari.

Prior to installation of the product please ensure you have installed the Java Runtime Environment (JRE). The latest version of Java can be obtained free from

NOTE: Fact sheets and images attached to items in Lucid v3.5 interactive key matrices may not display correctly due to updated operating systems and Java. To correct this issue, please download and run the updated installer, after installing your original product. Once downloaded, double-click on the .jar file to launch the update installer. If the .jar file extension is associated with any application other than Java they you may need to right-click on the file and use the "open with” function to launch the file using Java. Alternatively, from a command prompt run the following command:

java -jar filename.jar
for e.g. java -jar euclid_update_installer.jar

Once the updated installer is completed, you can then use the Euclid product.

NOTE: Web pages such as fact sheets attached to items in Lucid v3.5 interactive key matrices may be considered pop-ups by certain browsers (such as Internet Explorer (IE) when clicked on by users. If your browser blocks these popups, in your browser's internet settings you should allow pop-ups for this Lucid tool. Additionally, Internet Explorer may block "active content" on web pages or interactive keys. To allow active content, in Internet Explorer, under Tools, Internet Options, Advanced tab, Security category, the box next to the setting: "Allow active content to run in files on My Computer" should be checked.

For more information on the Lucid Player, contact