''Trigonobalanus verticillata'' is a species of
plant in the family
Fagaceae
The Fagaceae are a family of flowering plants that includes beeches, chestnuts and oaks, and comprises eight genera with about 927 species. Fagaceae in temperate regions are mostly deciduous, whereas in the tropics, many species occur as evergre ...
. It is a tree native to
Borneo,
Sumatra
Sumatra is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 473,481 km2 (182,812 mi.2), not including adjacent i ...
,
Sulawesi
Sulawesi (), also known as Celebes (), is an island in Indonesia. One of the four Greater Sunda Islands, and the world's eleventh-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Mindanao and the Sulu Ar ...
, the
Malay Peninsula
The Malay Peninsula (Malay: ''Semenanjung Tanah Melayu'') is a peninsula in Mainland Southeast Asia. The landmass runs approximately north–south, and at its terminus, it is the southernmost point of the Asian continental mainland. The area ...
, and
Hainan.
Description
''Trigonobalanus verticillata'' is a tree which grows 10 to 20 meters tall. The trunk has a diameter of 30 to 70 cm at breast height. It fruits between October and March.
[
]
Range and habitat
''Trigonobalanus verticillata'' is native to the highlands of Borneo, Sumatra, Sulawesi, the Malay Peninsula, and Hainan.[
It is found in tropical montane rain forest and evergreen broadleaf forest in Indonesia and Malaysia, and in tropical moist monsoon forest on Hainan, between 900 and 2,000 meters elevation.][
On Hainan its often found with the trees '']Castanopsis tonkinensis
''Castanopsis'', commonly called chinquapin or chinkapin, is a genus of evergreen trees belonging to the beech family, Fagaceae. The genus contains about 140 species, which are today restricted to tropical and subtropical eastern Asia. A tot ...
, Lithocarpus fenzelianus
''Lithocarpus'' is a genus in the beech family, Fagaceae. Trees in this genus are commonly known as the stone oaks and differ from ''Quercus'' primarily because they produce insect-pollinated flowers on erect spikes and the female flowers hav ...
, Liquidambar obovata
''Liquidambar'', commonly called sweetgum
(star gum in the UK),
gum, redgum, satin-walnut, or American storax, is the only genus in the flowering plant family Altingiaceae and has 15 species. They were formerly often treated in Hamamelidaceae. ...
'', and ''Dacrydium pectinatum
''Dacrydium pectinatum'' is a species of conifer in the family Podocarpaceae. It grows naturally in Hainan, Borneo, the Philippines and Sumatra
Sumatra is one of the Sunda Islands of western Indonesia. It is the largest island that is ful ...
''.[
]
Conservation
The species' conservation status is assessed as near threatened. It is threatened with habitat loss and fragmentation from deforestation, and its population is declining.[
]
References
{{Authority control
Fagaceae
Flora of Malesia
Flora of Hainan