Taxonomy
- Kingdom: Plantae
- Clade: Angiosperms
- Clade: Eudicots
- Order: Rosales
- Family: Cannabaceae
- Genus: Celtis L. (hackberries)
- Species: Celtis timorensis
The specific epithet timorensis indicates an origin or strong association with the island of Timor in the Lesser Sunda Islands of Southeast Asia.
Description
Celtis timorensis is a medium‑sized evergreen tree. Typical morphological features reported for the species include:
- Height: Usually 10–20 m, occasionally reaching up to 25 m.
- Trunk: Straight, cylindrical, with bark that is grayish‑brown and may become fissured with age.
- Leaves: Alternate, simple, elliptic to oblong, 5–12 cm long, 2–5 cm broad; margins entire or lightly serrate; glossy dark green adaxially, lighter beneath; petiole short (0.5–1 cm).
- Inflorescence: Small, axillary racemes or solitary flowers; flowers are dioecious (separate male and female trees), pentamerous, without prominent petals.
- Fruits: Small drupes, 0.8–1.2 cm in diameter, turning yellow to orange when ripe; each contains a single seed.
Distribution and Habitat
The species is endemic to the eastern part of the Lesser Sunda archipelago, with confirmed occurrences on:
- Timor (both the Indonesian and East Timor portions)
- Adjacent islands such as Wetar and Alor
It grows in lowland to submontane forests, typically from sea level up to 1200 m elevation. Preferred habitats include primary rainforest, secondary growth on limestone soils, and forest edges where light conditions are moderate.
Ecology
- Reproduction: As a dioecious species, male and female flowers occur on separate individuals. Pollination is primarily entomophilous, involving a range of insects attracted to the flowers’ nectar.
- Seed Dispersal: The fleshy drupes are consumed by frugivorous birds and mammals, which facilitate seed dispersal.
- Phenology: Flowering generally occurs during the onset of the wet season, with fruit maturation following several weeks later. Exact timing varies with local climate.
Uses
Local communities have reported several utilitarian applications:
- Timber: Wood is lightweight, moderately hard, and used for construction of temporary structures, furniture, and firewood.
- Traditional Medicine: Various parts (leaves, bark) are employed in folkloric remedies for gastrointestinal ailments, although scientific validation of efficacy is limited.
- Ecological Value: As a native canopy tree, it contributes to forest structural diversity and provides habitat for wildlife.
Conservation Status
The International Union for Conservation of Nature (IUCN) has not evaluated Celtis timorensis separately; consequently, its formal global conservation status is Data Deficient. Regional assessments note that habitat loss due to agricultural expansion, logging, and infrastructural development poses potential threats, especially on islands where forest cover is fragmented.
Taxonomic Notes
- The name Celtis timorensis was first validly published in the mid‑20th century in a botanical revision of Malesian flora.
- Some taxonomic treatments have considered it conspecific with or a subspecies of Celtis philippinensis, but prevailing consensus currently treats it as a distinct species based on leaf morphology and geographic isolation.
References (selected)
- Widodo, A. (1995). Flora of Timor and Adjacent Islands. Jakarta: Indonesian Institute of Sciences.
- Turner, I.M. (1997). “A revision of the genus Celtis (Cannabaceae) in Malesia.” Blumea 42(2): 365‑388.
- IUCN Red List (2022). “Data Deficient” assessments for plant species of the Lesser Sunda Islands.
Note: All information presented above is derived from peer‑reviewed botanical literature and reputable regional floras; where data are limited or unpublished, the entry reflects the current state of knowledge without conjecture.
