Tree for a hungry koala

• Australian eucalyptus

Wiktionary Word definitions in Wiktionary
n. 1 (context chiefly AU English) Any of several unrelated eucalypts that have dark, deeply furrowed bark. (from 18th c.) 2 (context chiefly AU English) The hard wood of these trees, as used in building and construction. (from 19th c.)

Wikipedia Word definitions in Wikipedia
Ironbark is a common name of a number of species in three taxonomic groups within the genus Eucalyptus that have dark, deeply furrowed bark . Instead of being shed annually as in many of the other species of Eucalyptus , the dead bark accumulates on the ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Ironbark \I"ron*bark`\, Ironbark tree \I"ron*bark` tree`\ (Bot.) The Australian Eucalyptus Sideroxylon , used largely by carpenters and shipbuilders; -- called also ironwood . Also applied to other Australian eucalyptuses with a hard, solid bark