Bark. Eucalypts with smooth (deciduous) bark, or with a smooth trunk above a rough-barked base are called gums. Peppermints and most boxes have rough, finely-fibrous bark, stringybarks have bark with long, stringy fibres, and ironbarks have hard, dark, ridged bark. Some eucalypts such as Yellow Box do not fit well into any of these groups.
The juvenile leaves (the leaves of sucker growth, or of plants less than a metre high) are often different to those on adult trees. Juvenile or sucker leaves can often be found, even on old trees, or growing nearby. They are very useful in identifying eucalypts. The presence of some of the rarer local eucaypts (e.g. Snow Gum, Scentbark and Brown Stringybark) was detected by their juvenile leaves. Most local eucalypts can be recognised by their juvenile leaves alone.