Blume's roughleaf (Gironniera blumei)

Blume's gironniera Ki bulu
Silhouette: T. Michael Keesey / License

Gironniera blumei: Tree Characteristics, Habitat and Distribution

Growing in the dense, warm rain forests of Southeast Asia, Gironniera blumei stands out as a resilient canopy tree species. This plant occurs naturally in primary and secondary tropical forests, often colonizing disturbed habitats and riverbanks. It plays a vital role in maintaining the ecological balance of lowland forest ecosystems.

Taxonomy

  • ∟ царство Plantae
  • ∟ division Tracheophytes
  • ∟ subdivision Spermatophytes (Seed plants)
  • ∟ Angiosperms
  • ∟ mesangiosperms
  • ∟ eudicots
  • ∟ Superrosids
  • ∟ rosids
  • ∟ order Rosales
  • ∟ family Cannabaceae (Hemp family)
  • ∟ genus Gironniera (Gironnier tree)
  • ∟ species Gironniera blumei (Blume's roughleaf)

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Morphology

This species develops into a medium-to-large evergreen tree, reaching heights of up to 30 meters under optimal conditions. The trunk is supported by strong wood and a robust root system. Field identification relies on several distinct vegetative features:

  • Bark: The outer protective layer is smooth and greyish-brown.
  • Leaves: The foliage is arranged alternately along the branchlets.
  • Shape: Individual leaf blades exhibit an elliptic-oblong form with a serrulate apex.

The reproduction is characterized by small, inconspicuous flowers that cluster in axillary inflorescences. Female flowers give rise to ovoid drupes, which measure between 5 to 8 millimeters in diameter. These fruits turn orange-yellow or red when fully ripe, attracting local birds and small mammals that assist in seed dispersal.

Applications

In local communities, the dense wood of Gironniera blumei is occasionally harvested for minor construction projects. It serves as a reliable source of timber for temporary structures, farming implements, and firewood. However, the high silica content in the wood makes it challenging to process with standard woodworking tools.

Interesting facts

Botanists frequently study this tree to understand forest regeneration patterns in disturbed tropical landscapes. The species is named in honor of Carl Ludwig Blume, a celebrated German-Dutch botanist who made pioneering contributions to Southeast Asian botany. Its fruits are a critical food source for forest frugivores during periods of seasonal scarcity.

Geography of distribution

  • Indonesia
  • Malaysia
  • Thailand
  • Myanmar

Sources

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

Technical Information

External Databases: GBIF, POWO, Tropicos

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