Xanthophyllum lanceatum is a tree in the
Polygalaceae family. It grows across Southeast Asia from
Sumatera to Bangladesh. The leaves are used as a
hops-substitute in beer making and the wood as fuel. Fish in the
Mekong regularly eat the fruit, flowers and leaves.
Description
Xanthophyllum lanceatum is a tree that grows some 8-15m tall.[2]
Flowering occurs in February and March in Thailand and Cambodia, with fruit appearing from April to July in Thailand.[3][4]
The wood has an unusual anatomical feature in that amongst the
ray cells there are procumbent, square and upright cells mixed throughout.[5]
Distribution
Xanthophyllum lanceatum is found across Southeast Asia, from
Sumatera to Bangladesh. Countries and regions that it grows in include: Indonesia (Sumatera); Malaysia (
Peninsular); Thailand; Cambodia; Vietnam; Laos; Myanmar; and Bangladesh.
Habitat and ecology
It is found in wetland communities of Southeast Asia.[2]
Along the
Phra Prong River (
Sa Kaeo Province, eastern Thailand), the riparian vegetation community has large trees scattered along the river bank.[3]
The common taxa are Hydnocarpus castaneus, this species, Dipterocarpus alatus, and Crateva magna. They show low natural regeneration, with few saplings and seedling. The two species, H. castaneus and X. lanceatum do show strong tolerance for flooding.[6]
Seedlings of the two taxa showed no elongation or biomass suppression, and adventitious roots were found. This indicates that they may play a strong role in vegetation restoration. Elsewhere on the river is the Bodhivijjalaya College campus of
Srinakharinwirot University. The riparian forest associated with this campus has the following trees: H. castaneus, Garuga pinnata, C. magna, Hopea odorata, D. alatus, Streblus asper, Knema globularia, Nauclea orientalis, and X. lanceatum.[7]
In the vegetation communities alongside the Mekong in
Kratie and
Steung Treng Provinces, Cambodia, this taxa is rare in the dense diverse strand community (last to be flooded each year, first to drain).[4]
It grows on soils derived from metamorphic sandstone bedrock, at 20-25m altitude.
The fruit, flowers and leaves of this tree have been observed to be regularly eaten by fish by fishers in the Mekong at
Khong District,
Champasak Province, southern Laos, and the fruit was found amongst the stomach contents of Pangasius polyuranadon fish examined in that area.[8]
Vernacular names
In
Thai the tree is known as chumsaeng.[7]Kânsaëng and pumsaèn are names used in Cambodia (
Khmer).[2]. In
Lao the plant is called soum seng[8]
Uses
The leaves have been used as a
hops-substitute in beer making.[2] The wood is used as firewood. The bark is used in folk medicine to treat
chickenpox
The extract from the fruit displayed excellent inhibitory activity against the plant-pathogenic fungus Magnaporthe grisea[9]
Dy Phon, P. (2000). Dictionnaire des plantes utilisées au Cambodge: 1-915. chez l'auteur, Phnom Penh, Cambodia
Kress, W.J., DeFilipps, R.A., Farr, E. & Kyi, D.Y.Y. (2003). A Checklist of the Trees, Shrubs, Herbs and Climbers of Myanmar Contributions from the United States National Herbarium 45: 1-590. Smithsonian Institution
Lê, T.C. (2003). Danh lục các loài thục vật Việt Nam [Checklist of Plant Species of Vietnam] 3: 1–1248. Hà Noi : Nhà xu?t b?n Nông nghi?p
Mostaph, M.K. & Uddin, S.B. (2013). Dictionary of plant names of Bangladesh, Vasc. Pl.: 1-434. Janokalyan Prokashani, Chittagong, Bangladesh
Newman, M., Ketphanh, S., Svengsuksa, B., Thomas, P., Sengdala, K., Lamxay, V. & Armstrong, K. (2007). A checklist of the vascular plants of Lao PDR: 1-394. Royal Botanic Gardens, Edinburgh
Pendry, C.A. 2001. Polygalaceae. Pp. 498–538 in Santisuk, T. & Larsen, K. (eds.) (2001). Flora of Thailand 7(3): 351-654. The Forest Herbarium, Royal Forest Department
Pendry, C.A. 2014. Polygalaceae. Flora of Cambodia, Laos and Vietnam, Fasc. 34. 63 pp., 4 pl. Royal Botanic Garden Edinburgh, Edinburgh; Muséum National d'Histoire Naturelle, Paris
Turner, I.M. (1995 publ. 1997). A catalogue of the Vascular Plants of Malaya Gardens' Bulletin Singapore 47(2): 347-655
Van der Meijden, R. 1982. Systematics and evolution of Xanthophyllum (Polygalaceae). (Leiden Botanical Series 7). 159 pp. E. J. Brill/Leiden University Press, Leiden, The Netherlands.
ISBN90-04-06594-6
Van der Meijden, R. 1988. Polygalaceae. Pp. 455–539 in Van Steenis, C.G.G.J. & De Wilde, W.J.J.O. (eds.), Flora Malesiana, Ser. I, Vol. 10(3). Kluwer Academic Publishers, Dordrecht
Van Steenis, C.G.G.J. & De Wilde, W.J.J.O. (eds.) (1984-1989). Flora Malesiana 10: 1-748. Noordhoff-Kolff N.V., Djakarta