West Indian elm (Theobroma guazuma)

Elm-leaved guazuma

Silhouette: T. Michael Keesey / License

Theobroma guazuma - Botanical Profile, Synonyms, and Information

Deep in the tropical forests of the Americas grows a woody plant historically designated as Theobroma guazuma. This species has transitioned through various taxonomic classifications over the centuries.

Botanists widely associate this name with the widely distributed tree known in modern nomenclature as Guazuma ulmifolia. It thrives in secondary forests and disturbed areas across tropical regions.

Taxonomy

∟ царство Plantae
∟ division Tracheophytes (Vascular Plants)
∟ subdivision Spermatophytes (Seed plants)
∟ Angiosperms
∟ mesangiosperms (Core angiosperms)
∟ eudicots
∟ Superrosids
∟ rosids
∟ malvids
∟ order Malvales
∟ family Malvaceae
∟ subfamily Byttnerioideae
∟ genus Theobroma (Cacao trees)
∟ species Theobroma guazuma (West Indian elm)

Morphology

This tree typically reaches a height of 10 to 30 meters, characterized by a spreading canopy and dark grey bark. The bark is rough and often fissures with age, releasing a mucilaginous substance when cut.

Key morphological features include:

Leaves: Alternate, ovate-oblong in shape, with finely serrated margins and asymmetric bases that resemble elm foliage.
Flowers: Small, pale yellow or cream-colored blossoms grouped in axillary clusters, emitting a sweet, honey-like fragrance.
Fruits: Woody, rounded, tuberculate capsules that turn black upon maturity and contain numerous small, hard seeds.

Flowering season

Mainly from April to October, depending on local rainfall patterns

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Applications

Various parts of this tree serve multiple practical uses in tropical rural communities. The wood is lightweight and highly valued for producing charcoal, firewood, and basic agricultural implements.

Other notable applications include:

Traditional Medicine: Decoctions prepared from the inner bark and leaves are used in folk remedies to address digestive issues and skin ailments.
Livestock Feed: The foliage and sweetish immature seedpods provide nutritious fodder for cattle and horses during dry seasons.
Ecological Restoration: Its fast growth rate and tolerance to poor soils make it an excellent pioneer species for reforesting degraded pasturelands.

Interesting facts

The historical association with the genus Theobroma links this species to the group containing the cacao tree. The name itself reflects the high esteem in which early botanists held these tropical forest plants.

Intriguing facts about the tree include:

Seed Dispersal: Livestock and wild mammals consume the mature, hard seedpods and assist in dispersing the seeds across pastures.
Mucilage Production: The bark contains a high concentration of slimy mucilage, which has historically been utilized in clarifying cane juice during sugar production.