naturebriefs
8:10in productionCh. 1 · Where it came from/ 8:10 · ceiling 15 min
Plants & trees · Evolution

Adansonia

A Madagascar-born genus that drinks like a camel, blooms like a flashbulb, and dies when the drought deepens — even in Africa.

Adansonia is a genus of eight deciduous trees native to Africa, Australia and Madagascar, with genomic evidence pointing to a Madagascan origin. It stores up to 120,000 litres of water in its trunk, sheds leaves in the dry season, and produces large flowers that open rapidly at dusk and remain reproductively active for no more than 15 hours — primarily pollinated by bats. In the early 21st century, southern African specimens died rapidly; blight and pests were ruled out, leaving mass dehydration as the leading hypothesis. All species occur in seasonally arid areas and share this drought-adapted physiology, though they differ in size, floral structure, fruit morphology and ploidy.

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Chapters & takeaways4
  1. 0:49
    Where it came from

    Eight species. Three continents. One origin: Madagascar.

  2. 2:22
    How it survives drought

    Stores up to 120,000 litres of water. Sheds leaves in the dry season. Diameter changes with rain.

  3. 3:32
    How it reproduces

    Flowers open visibly at dusk. Reproductive window: under 15 hours.

  4. 4:26
    Where it fails

    Southern African baobabs died rapidly in the early 21st century — likely from mass dehydration.

Worth your time?

Yes. See the whole thing.

4.5/ 5
What works
  • stores vast volumes of water in its trunk — proven by measurable diameter fluctuation with rainfall
  • times reproduction precisely: flowers open visibly at dusk and last under 15 hours, matching bat activity
  • occupies ecological niches no other tree fills: massive, long-lived, drought-deciduous, bat-pollinated, continent-spanning
What does not
  • tolerate sustained cold, flooding or year-round humidity
  • flower outside its native seasonal rhythm
  • resist rapid dehydration under rising temperatures and drought
See it if
  • field botanists
  • ecologists
  • naturalists working in seasonally arid zones of Africa, Australia or Madagascar
Skip it if
  • gardeners in temperate or humid climates
  • conservation managers lacking drought-monitoring capacity
The written brief1 min read

What the species is and where it came from

Adansonia is a genus of eight deciduous trees native to Africa, Australia and Madagascar. Genomic evidence indicates it originated in Madagascar.

How it works, in terms someone would actually use

Baobabs store water in their trunks — up to 120,000 litres — to survive seasonally arid conditions. They shed leaves in the dry season. Their flowers open rapidly at dusk and remain reproductively active for no more than 15 hours. Bats pollinate them.

What it gets right

It stores vast volumes of water in its trunk — proven by measurable diameter fluctuation with rainfall. It times reproduction precisely: flowers open visibly at dusk and last under 15 hours, matching bat activity. It occupies ecological niches no other tree fills: massive, long-lived, drought-deciduous, bat-pollinated, continent-spanning.

What it does not

It does not tolerate sustained cold, flooding or year-round humidity. It does not flower outside its native seasonal rhythm. It does not resist rapid dehydration under rising temperatures and drought — southern African specimens died en masse in the early 21st century, with blight and pests ruled out.

What it changed

The genus originated in Madagascar, then dispersed to Africa and Australia. Its eight species now occupy seasonally arid zones across those continents, each with distinct floral structure, fruit morphology and ploidy — but all share drought-adapted deciduousness and trunk-based water storage.

Who it is for, and who it is not

It is for field botanists, ecologists and naturalists working in seasonally arid zones of Africa, Australia or Madagascar. It is not for gardeners in temperate or humid climates, nor for conservation managers lacking drought-monitoring capacity.

Is it worth your time

Yes — if you are in Africa, Australia or Madagascar during the dry season and can locate a flowering individual at dusk. The flower’s visible opening and bat visitation are observable, discrete events. Elsewhere, most specimens are introduced and non-flowering.

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