Tree for a hungry koala

• Australian eucalyptus

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 ...

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.)

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