Xanthophyllum longum
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Fabales
Family: Polygalaceae
Genus: Xanthophyllum
Species:
X. longum
Binomial name
Xanthophyllum longum
W.J.de Wilde & Duyfjes[2]

Xanthophyllum longum is a tree in the family Polygalaceae. The specific epithet longum is from the Latin meaning "long", referring to the petioles.[3]

Description

Xanthophyllum longum grows up to 5 metres (20 ft) tall with a trunk diameter of up to 10 centimetres (4 in). The bark is pale greenish or blackish. The brownish fruits are round and measure up to 1.7 cm (1 in) in diameter.[3]

Range and habitat

Xanthophyllum longum is endemic to Borneo and known only from Sabah, where it is known only from Sg Pinangah Forest Reserve. The species' current estimated extent of occurrence (EOO) and area of occupancy (AOO) are 4 km2. It grows in lowland rain forests along streams and on hillsides on undulating land between 350 and 500 metres elevation.[1]

Conservation

Urbanization and habitat loss have reduced its area of occupancy by 67%, and its extent of occurrence (EOO) by over 90%. The species' remaining population is within a commercial forest reserve, which is open to logging. Its conservation status is assessed as critically endangered.[1]

References

  1. 1 2 3 Tanggaraju, S.; Hor, C.S.; Sugau, J.; Nilus, R.; Maycock, C.R.; Matusin, Dg Ku Rozianah, M.; Khoo, E.; Damit, A.; Mohd Yusof, Nur Adillah, M.Y.; Tsen, S.; Pereira, J.T. (2021). "Xanthophyllum longum". IUCN Red List of Threatened Species. 2021: e.T162025212A162033764. doi:10.2305/IUCN.UK.2021-1.RLTS.T162025212A162033764.en. Retrieved 5 April 2023.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  2. ↑ "Xanthophyllum longum W.J.de Wilde & Duyfjes". The Plant List. Retrieved 25 March 2014.
  3. 1 2 De Wilde, W. J. J. O.; Duyfjes, Brigitta E. E. (March 2007). "Xanthophyllum longum W.J.de Wilde & Duyfjes" (PDF). In Soepadmo, E.; Saw, L. G.; Chung, R. C. K.; Kiew, Ruth (eds.). Tree Flora of Sabah and Sarawak. (free online from the publisher, lesser resolution scan PDF versions). Vol. 6. Forest Research Institute Malaysia. p. 261. ISBN 978-983-2181-89-7. Retrieved 25 March 2014.


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