An initiative of Earthwatch Institute

  1. 137 Leaves and fruit photo by Berkeley Fitzhardinge
  2. 137_0 Photo by Berkeley Fitzhardinge
  3. 137_1 Photo by Berkeley Fitzhardinge
  4. 137_2 Photo by Berkeley Fitzhardinge
  5. 137_3 Flowers and leaves photo by Berkeley Fitzhardinge
  6. 137_4 Flower photo by Berkeley Fitzhardinge


Adansonia gregorii


  • Deciduous tree with bottle-shaped trunk.
  • Size: 5 – 15 m high.
  • Flowers: Large, white to cream flowers that open at night.
  • Fruit: oval-shaped fruit, up to 18 cm long and contains numerous seeds.

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)
  • Seeds dropped to the ground (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)
  • Fruit fully ripened / turned brown (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

  • December to May, for flowering and leaf appearance.

Where To Look

  • In the Kimberley region of Western Australia.


Boab Occurrence Map


  1. Search Species

  1. Did You Know?

    Its genus name Adansonia is named after M. Adanson, a French naturalist.

    The species name gregorii honours the Australian explorer Augustus Gregory.