- 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.
Where To Look
Maps of Habitat Suitability
of occurrence (RCP 8.5)
|Species range change from
current to 2070 probability
Above, the left and middle maps show the modelled habitat suitability for the the species under current and potential future climate conditions. The colours indicate the predicted habitat suitability from low (white) to high (dark red).
The future habitat suitability is modelled for the year 2070 under a climate change scenario that represents 'business as usual' (RCP 8.5). The map on the right shows how the range of the species might change between now and 2070, with orange areas indicating where the species might disappear, green areas where the species range might expand, and blue areas where the habitat is predicted to be suitable for the species now and in the future.
The models for this species were run in the Biodiversity and Climate Change Virtual Laboratory. Please note that while models can be very informative, they are only a representation of the real world and thus should always be viewed with caution. You can read more about the science behind these models here.
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.
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).
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.