The Triarius, a tree, is a very large Eucalyptus regnans that is located in southern Tasmania, Australia.
[1] The tree was discovered in August 2008 by employees of Forestry Tasmania while analysing the data collected by LiDAR system used in mapping and assessment of state forest resources.
[2] The tree was discovered located in secondary forest and survived logging and forest fires by a lucky coincidence.
Next to the Triarius, south-east from it there grows the highest known eucalypt in the world - the 100.5-metre (330 ft) tall E. regnans named Centurion.
While not reduced in height many of the branches and leaves dropped off and its survival was uncertain months later.