Newsletter
Xanthophyllum affine Korth. ex Miq.
by Nor Ezzawanis Abdullah Thani
Newsletter
Xanthophyllum affine Korth. ex Miq.
by Nor Ezzawanis Abdullah Thani

Xanthophyllum affine is a member of the Polygalaceae, a family represented by 5 genera (Epirixanthes, Polygala, Salomonia, Securidaca and Xanthophyllum), 37 species and 4 subspecies in Peninsular Malaysia. The Polygalaceae is an interesting family because its flowers resemble those of the Leguminosae due to parallel evolutionary specialisation to insect pollination. The flowers of Xanthophyllum are weakly asymmetric and resemble those of the Caesalpinioideae, while the flowers of the other genera resemble those of the Papilionatae.

Xanthophyllum is derived from the Greek words ‘xanthos’ which means yellow and ‘phyllum’ meaning leaf and refers to the leaves that dry yellowish in many species. This coloration is due to the high aluminium content in the tissues. Most species occur in Malesia but also extend as far south as Australia and as far north as southern India. In Peninsular Malaysia, Xanthophyllum is popularly known by its Malay name ‘Minyak berok’, and for Xanthophyllum affine, the Malay names are ‘gading jantan’, ‘lima berok jantan’ and ‘lima berok puteh’.

Out of the 25 species of Xanthophyllum in Peninsular Malaysia, Xanthophyllum affine is the most common. It occurs throughout Peninsular Malaysia from the lowlands and freshwater swamps up to about 1700 m altitude in mountains. It favours forest margins, thickets and river-banks.

Xanthophyllum affine is characterised as a small to big tree (rarely a shrub elsewhere) up to 30 meters tall with a bole to 68 cm diameter. The grey bark is smooth with a rugulose to finely lenticellate surface. The twigs are mostly very densely minutely greyish hairy or glabrescent. The lamina is elliptic to oblong-elliptic (rarely ovate), 6–27 × 2.8–10 cm, with a narrowed base (rarely rounded) and acuminate apex. Pitted glands are nearly always present on the underside of the lamina. The midrib is prominent above and thicker than the 4 to 12 pairs of secondary veins. The tertiary veins are ladder-like. When dry, the lamina is grey-green to bright yellow-green. The inflorescences are racemes up to 20 cm long. The flowers are slightly asymmetric with one of the five petals developed into a keel. The petals are white or yellow (or rarely pink elsewhere) and the upper petal has an orange-yellow spot. The keel is hairy but the other petals are glabrous or only hairy towards the base. The young fruits are ovoid becoming round and creamy to brown when mature. They are single-seeded.

Regarding uses, the timbers of several Xanthophyllum species (including Xanthophyllum affine) are suitable for medium construction under cover. It is also suitable for flooring, planking, veneer and plywood, furniture, sport goods and tool handles.

References

  1. Boer, E. & Sosef, M.S.M. (1998). Xanthophyllum affine Korth. ex Miq.. Plant Resources of South-East Asia (PROSEA): Timber trees: Lesser-known timbers , volume 5 (3). pp. 585
  2. Identification and Utilization of Lesser-Known Commercial Timbers in Peninsular Malaysia 10: Meraga, Merbau Kera, Merbau Lalat and Minyak Berok. Timber Technology Bulletin (46), 2008. Forest Research Institute Malaysia (FRIM), Malaysia.
  3. Stearn, W.T. (1966). Botanical Latin. Nelson, London, England. pp. 566.
  4. Turner, I. (1995). A Catalogue of the Vascular Plants of Malaya. The Gardens' Bulletin Singapore 47 (1 & 2): pp. 265
  5. Van Steenis, C.G.G.J. & de Wilde, W.J.J.O. (1989). Flora Malesiana. Series 1 - Spermatophyta, Volume 10, Issue/No. 4. Kluwer Academic Publishers, Netherlands. pp. 748.
  6. Whitmore, T.C. (1972). Tree Flora of Malaya: A Manual for Foresters, Volume 1. Forest Department, Ministry of Agriculture and Lands, Malaysia. pp. 273.
QR Code
Scan QR code for mobile experience

Other articles

Rhacophorus norhayatii Chan and Grismer, 2010

Nur Athirah Binti Fauzi & Kaviarasu Munian   •   31 Jul 2019   •   238 views

Zosterops palpebrosus Temminck, 1824

Nur Alwani Binti Zakaria   •   30 Jun 2019   •   160 views

Lepisanthes rubiginosa (Roxb.) Leenh. (Sapindaceae)

Syazwani Bt. Azeman   •   31 May 2019   •   161 views

Sandoricum koetjape (Burm.f.) Merr. (Meliaceae)

Norzielawati Bt. Salleh   •   30 Apr 2019   •   262 views

Platycerium coronarium (Konig ex Muller) Desv. (Polypodiaceae)

Syahida Emiza Suhaimi & Ahmad Syahir Zaini   •   31 Mar 2019   •   317 views
Experience the beauty of our rainforest at the 'Hutan Kita' exhibition, starting August 24 till September 22, 2019 at Menara Kuala Lumpur. #JourneyThroughOurRainforest
Admission is free
Malaysia Biodiversity Information System (MyBIS)
Copyright © 2019, Ministry of Water, Land and Natural Resources (KATS). All rights reserved. DISCLAIMER - The Malaysian Government, and Ministry of Water, Land and Natural Resources (KATS) shall not be liable for any loss or damage caused by the usage of any information obtained from this website. By entering this site, you acknowledge and agree that no portion of this site, including but not limited to names, logos, trademarks, patents, sound, graphics, charts, text, audio, video, information or images are either MyBIS property or the property permitted by third-party and shall not be used without prior written approval from the owner(s).
Best viewed using latest Mozila Firefox, Google Chrome and Internet Explorer 10 with Resolution 1024 x 768px or above. Version 2.0 / 2016