Glaucous Quassia (Quassia glauca)

Paradise tree Dysentery-bark Bitterwood Aceituno
Silhouette: T. Michael Keesey / License

Quassia glauca: Guide to the Sacred Paradise Tree

Drifting through the warm breezes of Caribbean coastal hammocks, a bitter but sweet mystery lingers in the air where the majestic Quassia glauca rises. Historically revered by indigenous communities for its potent therapeutic virtues, this tropical canopy member has long played a vital role in traditional healing practices.

Beyond its medicinal allure, the species is a cornerstone of its native ecosystems, providing shelter and sustenance to various pollinators. Its resilience in poor soils highlights its adaptive genius, making it a subject of fascination for ecological restoration projects.

Taxonomy

  • ∟ царство Plantae
  • ∟ division Tracheophytes
  • ∟ subdivision Spermatophytes (Seed plants)
  • ∟ Angiosperms
  • ∟ mesangiosperms
  • ∟ eudicots
  • ∟ Superrosids
  • ∟ rosids
  • ∟ malvids
  • ∟ order Sapindales
  • ∟ family Simaroubaceae (Quassia family)
  • ∟ genus Quassia (Quassia Wood)
  • ∟ species Quassia glauca (Glaucous Quassia)

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Morphology

Quassia glauca is a medium-sized evergreen tree capable of reaching heights of up to 20 meters in its optimal tropical habitats. The trunk is straight with smooth, greyish-brown bark that becomes slightly fissured as the specimen matures.

The foliage is characterized by alternate, pinnately compound leaves consisting of numerous oblong leaflets. Each leaflet displays a dark green, lustrous upper surface contrasted by a pale, glaucous underside that gives the species its botanical name.

During the flowering season, the tree produces large terminal panicles of small, greenish-yellow flowers. These blossoms eventually develop into oval, fleshy drupes that transition from green to a deep purple or black shade upon reaching full maturity.

Flowering season

Typically flowers during the dry season from spring to early summer.

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Applications

In traditional medicine, preparations derived from the bark of Quassia glauca have been utilized to treat malaria, fevers, and gastrointestinal ailments like dysentery. The active bitter compounds, known as quassinoids, are responsible for these therapeutic properties.

The seeds are a rich source of edible oil, which is extracted and used in culinary applications as well as in the manufacturing of soaps and cosmetics. Additionally, the lightweight wood is utilized in local crafts, match production, and paper manufacturing.

Interesting facts

  • Natural Insecticide: The bark contains highly bitter quassinoids that act as a natural defense mechanism, deterring herbivorous insects and pests from feeding on the tree.
  • Wildlife Oasis: The ripe, colorful fruits are a favorite food source for tropical birds and monkeys, which play a crucial role in seed dispersal across the forest.
  • Biofuel Potential: Scientific investigations have explored the high oil content of the seeds as a sustainable raw material for biodiesel synthesis.

Geography of distribution

  • United States
  • Mexico
  • Cuba
  • Costa Rica
  • Guatemala

Sources

Technical Information

External Databases: GBIF, POWO, Tropicos

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