River Red Gum Elizabeth Donoghue/Flickr

River Red Gum

Eucalyptus camaldulensis

Did You Know?

  • Some trees can reach ages of 500 - 1000 years
  • Has the widest natural distribution of any eucalyptus species
  • An iconic and important species of the Murray-Darling catchment, both ecologically and economically
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A tall tree to 40 m with smooth bark, mottled, shedding at intervals throughout the year showing white, yellow and grey, becoming roughened at the base.

Frequently a straight tree but can develop more twisted habit in drier conditions.

Leaves

The tree has a large, dense crown of long and narrow adult leaves, lanceolate in shape or infrequently sickle-shaped, 5 - 30 cm long by 0.7 - 3.2 cm wide, and grey to grey-green on both surfaces. Side veins are prominent and usually at 45° to the leaf midrib, and oil glands are numerous and located separate to the veins.

Flowers

Its inflorescences (flower heads) are comprised of umbels of 7 to 11 flower buds located at the junction of the leaves and stem with the buds being of ovoid or globular shape and 0.6 - 1.1 cm long by 0.3 - 0.6 cm wide. Buds are green to yellow or cream, and have a prominent tip beak. Flowers are white to cream.

Fruits/Seeds

Fruit are without a stalk (pedicellate) to 0.6 cm long and 1 cm wide. Seed is yellow or yellow-brown, cuboid, smooth.

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What to Observe

  • First fully open single flower

  • Full flowering (record all days)

  • End of flowering (when 95% of the flowers have faded)

  • No flowering

  • Fruits/seeds (record all days)

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When and Where

When To Look

  • Flowers in most years from late spring to summer
  • Flowering intensity is variable and unpredictable from year to year
  • Fruit development and maturation time can be as short as 4 months

Where To Look

  • Along watercourses over much of mainland Australia
  • Commonly found along waterways and riverine sites
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What Else?

Similar Species

The species over its whole distribution is distinguished by the seeds which are cuboid and have two seed coats. All other red gums have seeds with a single dark brown to black seed coat.