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  1. 84
  2. 84 Full flowering photo by Rich Weatherill
  3. 231_jacaranda_open_seed_pod_by_rich_weatherill-cropped Flat and open seed pod (3-6 cm in diameter) by Rich Weatherill

Jacaranda

Jacaranda mimosifolia

Appearance

  • Deciduous tree
  • Size: up to 15 m high and wide.
  • Leaves: bright green, feathery and fern-like. Individual leaves are narrow and elliptic, 3 – 12 mm long and arranged either side of a 5 – 10 cm long stem. They turn yellow in autumn before falling from the tree.
  • Flowers: blue-purple and trumpet-shaped, forming clusters that are 20 – 30 cm in diameter. Each individual flower is 2 – 3 cm long and about 1 cm wide. They are lightly fragranced and remain on the tree for about two months.
  • Fruit/seed: a red-brown seed pod that is round and flat, and 3 – 6 cm in diameter. It can remain on the tree for several months. 

What to Observe

  • First fully open single flower
  • Full flowering (record all days)
  • End of flowering (when 95% of the flowers have faded)
  • Open seed pods (record all days)
  • First fully open leaf
  • Leaves open (record all days)
  • First leaf to change colour
  • Leaves changing colour (record all days)
  • First leaf to drop this year
  • 50% or more of leaves dropped (record all days)
  • No leaves (record all days)

ClimateWatch Science Advisor

We expect plants to start shooting and flowering earlier in the year as a result of climate change warming the Earth. They may also start appearing in new areas, as warmer temperatures enable them to live in environments that were previously too cold for them.

When To Look

  • From spring through to autumn
  • Leaves appear in spring after the flowers
  • Flowers appear in spring (November in NSW and September/October in North Qld)
  • Seed pods appear after flowering
  • Leaves change colour in autumn before falling 

Where To Look

  • Widely throughout Australia, except in frost-prone areas such as mountainous regions.
  • In urban areas – in gardens, parks and roadsides.

Jacaranda Occurrence Map ALA

References

Australian Biological Resources Study 1982. Flora of Australia Volume 33. CSIRO Publishing / Australian Biological Resources Study.

Harden G (ed.) Flora of New South Wales: Vol. 1 (revised edition, 2000), Vol. 2 (revised edition, 2002), Vol. 3 (1992), Vol. 4 (1993). University of NSW Press.

Menninger EA 1962. Flowering trees of the world. Hearthside Press, New York.

Links

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  1. What Else?

    Tibouchina or Purple Glory Bush (Tibouchina urvilleana): smaller (up to 4m high), with larger leaves (4 – 12cm long) and larger flowers (each petal is about 4cm long).

  1. Did You Know?

    The Jacaranda is originally from South America.

    There is an Australian Christmas song about Jacarandas because it flowers shortly before Christmas.

    There are four stamens inside the flower which produce pollen, and also a staminode which doesn’t produce any pollen.