1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Trachycarpus H.Wendl.
      1. Trachycarpus oreophilus Gibbons & Spanner

        This species is accepted, and its native range is N. Thailand.

    [PW]
    Biology
    Forming large colonies on steep, rocky hillsides and exposed cliffs among lichen- and moss-covered shrubs and stunted trees on the mountain's several peaks, between 1700 and 2150 m.
    General Description
    Solitary, very lightly armed, dioecious palm to about 9 m tall; trunk slender, erect, bare, brown, conspicuously ringed, 10-16 cm in diam., in young plants occasionally clothed in persistent, fibrous leaf sheaths. Leaves about 20, forming a dense upright, rather flat crown; marcescent leaves few, leafblade, petiole and leafsheath soon deciduous, the thick, almost bulbous leaf bases persistent at first, covering the trunk for about 50 cm below the crown, eventually deciduous; leafsheath fibrous, about 30 cm long, brown, fine, soft, rapidly disintegrating thinly tomentose below, separated into short single threads towards the apex, not forming an appendage petiole about 50 cm long, stiff, robust, 2 cm wide near the middle, flattish above, depressedly triangular to rounded below, margins minutely toothed and thinly tomentose base thick and robust; adaxial hastula prominent, to 3 cm long, triangular, acute; leafblade palmate, 3/4 to nearly 4/4 orbicular, about 70 cm long from the hastula and about 100 cm wide, leathery, green above, glaucous below, parted to a nearly even depth for more than 1/2 its length into about 60 stiff, deeply folded, linear segments, tapering towards the apex from their broadest point; central segments about 70 cm long, lateral segments gradually shorter to 40 cm, apex acute-notcheds, hortly bifid for a few centimeters. Inflorescence about 4, solitary, interfoliar, 90-100 cm long; staminate inflorescence erect, peduncle short; prophyll two-keeled, 25 cm long; peduncular and rachis bracts five, 15-25 cm long, base tubular, inflated distally, apex acute; rachillae short; flowers globose, very small; sepals very small, ovate, joined at the base for 1/4 to 1/5 of their length; petals rounded with a blunt tip, 2.5 times as long as the sepals; stamens 6; filaments ventricose; anthers broadly ovate-sagittate with nearly disjoint cells, not apiculate; pistillodes (2-) 3, half as long as the stamens; pistillate inflorescence stiff, slightly arching or nearly horizontal in fruit, densely branched to three orders; peduncle about 50 cm long oval in cross section, 3.5 X 2 cm; prophyll two-keeled, apex acute; peduncular bracts three, 35 cm long, long and tubular; rachis bracts two, the basal one 25 cm long, similar to peduncular bracts, the distal one small and much reduced; rachillae 3-10 cm long, greenish (in fruit); flowers not seen. Fruit on short stalks, reniform, wider than long, epicarp thin, green, not seen when fully mature; mesocar? thin, fibrous; seed reniform, wider than long, 6 mm long, ll mm wide; endocarpv ery thin, with a crustaceoussa nd like layer of small, irregular scales; endosperm homogenous. Germination remote-tubular, eophyll simple, plicate, papery, 1 cm wide. Seedling leaves narrow, erect and very finely divided.
    Distribution
    NW-THAILAND: Doi Chiang Dao, a large, isolated limestone mountain about 70 km N of Chiang Mai.
    Conservation
    The population on Doi Chiang Dao is the only one known in Thailand and there is no evidence to suggest that it might occur in similar sites outside Thailand, in Burma for instance. The Doi Chiang Dao population consists of a few thousand trees and is protected in a forestry reserve. It appears to be in a good state though all the more accessible sites have long since been cleared of palms by tribes of people and there are no seedlings and few young plants present at them. However, the vast majority of the palms grow in very steep, practically inaccessible sites and as pressure on these stands by man or beast is negligible, their future seems secure.W e would categorizeit as rare. Trctchycarpus oreophilus has only very recently been introduced into cultivation. There are no mature palms of this species outside its native habitat.
    Diagnostic
    Habitu, forma fructu T. fortunei, T. principi, T. takil et T. wagneriano similis sed vaginis foliorum brevibus, celeriter fatiscentibus et caducis, sine appendiculo, base petioli crassa, hastula prominentissima, lamina regulariter divisa, infra glauca, pedunculo inflorescentiae pistillatae longa differt.

    Distribution

    Native to:

    Thailand

    Trachycarpus oreophilus Gibbons & Spanner appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    May 5, 1998 Niyomdham [4949], Thailand K000522277

    First published in Principes 41: 205 (1997)

    Accepted by

    • Barfod, A.S. & Dransfield, J. (2013). Flora of Thailand 11(3): 323-498. The Forest Herbarium, National Park, Wildlife and Plant Conservation Department, Bangkok.
    • Henderson, A. (2009). Palms of Southern Asia: 1-197. Princeton university press, Princeton and Oxford.
    • Govaerts, R. & Dransfield, J. (2005). World Checklist of Palms: 1-223. The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Pooma, R. (ed.) (2005). A preliminary check-list of threatened plants in Thailand: 1-193. National Park, Wildlife and Plant Conservation Department, Bangkok.

    Literature

    Palmweb - Palms of the World Online
    • M. Gibbons, Trachycarpus oreophilus - The Thailand Trachycarpus. 1997
    Kew Backbone Distributions
    • Henderson, A. (2009). Palms of Southern Asia: 1-197. Princeton university press, Princeton and Oxford.

    Sources

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Kew Names and Taxonomic Backbone
    The International Plant Names Index and World Checklist of Selected Plant Families 2019. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

    Palmweb - Palms of the World Online
    Palmweb 2011. Palmweb: Palms of the World Online. Published on the internet http://www.palmweb.org. Accessed on 21/04/2013
    Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License http://creativecommons.org/licenses/by-nc-sa/3.0