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  1. 90 Victorian Christmas Bush
  2. 260_victorian_christmas_bush_prostanthera_lasianthos_-_rbg_melb_-_credit_to_rachel_maitland Empty seed pods by Rachel Maitland
  3. 053_victorian_christmas_bush_-_by_nuytsia_tas_on_flickr_shrub Full flowering by Nuytsia@Tas on Flickr

Victorian Christmas Bush

Prostanthera lasianthos

Appearance

  • Evergreen shrub or small tree.
  • Size: 1 – 6 m high.
  • Leaves: bright yellow-green to dark green and paler underneath. They are 4 – 15 cm long, 1 – 3 cm wide, and generally have a toothed or curved edge.
  • Flowers: funnel-shaped and white, or pink to pale mauve, with purple and orange spots inside. They are about 2 cm long and grow in clusters at the end of branches. They are slightly scented.
  • Fruit/seed: known as a mericarp, it is 2 mm long and contains one seed which is about 1mm long. 

What to Observe

  • First fully open single flower
  • Full flowering (record all days)
  • End of flowering (when 95% of the flowers have faded)
  • Seeds dropped to the ground (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 late spring through summer.
  • Flowers appear from November to March.
  • Fruit appears after flowering. 

Where To Look

  • In coastal and sub-alpine areas, from southern Queensland to Tasmania.
  • In rainforests, forests and woodlands, commonly along watercourses and in moist gullies. It is also found in urban areas, particularly in gardens.

Victorian Christmas Bush distribution map - ANBG

Victorian Christmas Bush distribution map - ANBG

Where To Look

Maps of Habitat Suitability

Prostanthera_lasianthos-victorian_christmas_bush

Current probability
of occurrence
2070 probability
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.

Sightings

References

Australian Biological Resources Study 1982. Flora of Australia Volume 31. CSIRO Publishing / Australian Biological Resources Study.

Walther G, Post E, Convey P, Menzel A, Parmesan C, Beebee TJC, Fromentin J, Hoegh-Guldberg O, and Bairlein F 2002. Ecological responses to recent climate change. Nature 416: 389–395.

Links

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  1. What Else?

    Another Prostanthera species (“mint bush”): won’t have fine hairs on the inside and outside of the flowers, which can be seen with a magnifier on the Victorian Christmas Bush.

  1. Did You Know?

    The leaves have a minty smell when crushed.

    It is known by Indigenous Australians as Coranderrk (Wurrundjeri) and its flower stems were used as fire sticks.