Poinciana (Delonix baccal)

Silhouette: T. Michael Keesey / License

Delonix baccal: Umbrella-Crowned Dryland Tree Species

Gracefully shaping the skyline of the Horn of Africa, Delonix baccal is renowned for its wide, umbrella-like canopy. This majestic tree is native to the arid bushlands of Ethiopia, Kenya, and Somalia, where it withstands harsh droughts. It is highly valued by local communities both for its ecological adaptability and for the utility of its wood and seed pods.

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 baccal (Poinciana)

Living Pulse

Powered by iNaturalist

Morphology

Delonix baccal grows into a large tree reaching heights of 6 to 18 meters, topped by a flat, umbrella-shaped crown. The bark is smooth and grey, with a papery outer layer that peels off in thin, delicate sheets.

The morphology of its foliage and flowers displays several distinguishing features:

  • Leaves: Double-pinnate structure with secondary segments bearing 10 to 20 rounded leaflets.
  • Flowers: Clustered in racemes of 4 to 9 blossoms, showing a striking color contrast where four petals are white with salmon-pink claws, and the fifth upper petal is bright yellow.
  • Stamens: Composed of yellow filaments measuring 3 to 4 centimeters in length and bright orange anthers.
  • Pods: Flat, woody seed pods that range from 15 to 24 centimeters long and 2.5 to 3.5 centimeters wide.

Applications

In dry, semi-arid regions, Delonix baccal is frequently planted as an ornamental and shade-giving tree due to its beautiful blossoms and wide canopy. Its ability to grow on shallow limestone soils makes it useful for land reclamation and agroforestry.

Local usage includes:

  • Household Utensils: The Borana people of Ethiopia harvest the wood to carve traditional cups, bowls, and other domestic implements.
  • Fuelwood: The large, dry seed pods are collected and burned as a highly efficient local fuel source.

Interesting facts

Growing on rugged limestone slopes and granite escarpments, Delonix baccal has adapted to flourish in soils that are too shallow or poor for most other tree species. It is commonly found growing alongside species of Commiphora and Acacia in deciduous dry bushlands.

Other interesting aspects of this species include:

  • Conservation status: It is currently classified as Near Threatened on the IUCN Red List, facing pressure from habitat degradation and localized wood cutting.
  • Altitudinal range: This tree occupies a wide elevation bracket, thriving anywhere from 180 meters up to 1,080 meters above sea level.

Geography of distribution

  • Ethiopia
  • Kenya
  • Somalia

Sources

Technical Information

External Databases: GBIF, POWO, Tropicos

See also