Baobab Delonix (Delonix adansonioides)

Silhouette: T. Michael Keesey / License

Delonix adansonioides - Madagascar Baobab-like Tree Profile

Standing as a striking silhouette against the arid landscapes of southwestern Madagascar, this pachycaul tree displays an extraordinary adaptation to drought. It is highly valued by botanists for its unique growth form that resembles a miniature baobab.

The species occupies a highly localized ecological niche within dry deciduous forests and spiny thicket formations. Due to ongoing environmental pressures, its wild populations are increasingly vulnerable to habitat degradation.

Taxonomy

  • ∟ царство Plantae
  • ∟ division Tracheophytes (Vascular Plants)
  • ∟ subdivision Spermatophytes (Seed plants)
  • ∟ Angiosperms
  • ∟ mesangiosperms (Core angiosperms)
  • ∟ eudicots
  • ∟ Superrosids
  • ∟ rosids
  • ∟ order Fabales
  • ∟ family Fabaceae
  • ∟ subfamily Caesalpinioideae
  • ∟ genus Delonix (Flamboyant tree)
  • ∟ species Delonix adansonioides (Baobab Delonix)

Living Pulse

Powered by iNaturalist

Morphology

The most defining characteristic of this tree is its swollen, water-storing trunk, which allows it to survive prolonged dry seasons. It typically reaches a height of 10 to 12 meters with a wide, spreading canopy.

Key morphological features include:

  • Trunk: Thickened and pachycaul, functioning as a primary reservoir for moisture during droughts.
  • Foliage: Alternate, bipinnately compound leaves that are shed during the dry season to prevent transpiration.
  • Flowers: Pale yellow to white blooms that appear during the onset of the rainy season to attract pollinators.
  • Fruit: Large, woody pods containing hard seeds that are adapted to withstand environmental extremes.

Flowering season

Wet season, typically late spring to early summer

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Name
Dec

Applications

In its native ecosystems, this tree plays a vital role by providing shade and stabilizing the fragile soils of arid environments. Its water-rich wood is sometimes utilized by local wildlife during severe droughts.

Major ecological and minor local uses include:

  • Soil stabilization: Deep root systems help prevent erosion in sandy and limestone soils.
  • Ecological support: Flowers serve as a crucial food source for native insects and lemurs.

Interesting facts

The evolutionary adaptation of its trunk mimicking the baobab is an example of convergent evolution in drought-prone regions. This structure allows the tree to maintain its physiological functions when surrounding vegetation has withered.

Fascinating facts include:

  • Water storage: The spongy wood in the trunk holds large quantities of water, acting as a living reservoir.
  • Deciduous behavior: It sheds all its leaves quickly at the end of the wet season to conserve internal moisture.

Geography of distribution

  • Madagascar

Sources

  • POWO: Plants of the World Online
  • WFO: World Flora Online
  • GBIF: Global Biodiversity Information Facility

Technical Information

External Databases: GBIF, POWO, Tropicos

See also