1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Calamus L.
      1. Calamus acamptostachys (Becc.) W.J.Baker

        This species is accepted, and its native range is Borneo (Sarawak).

    [PW]
    Vernacular
    widuduk (Ib.)
    General Description
    Solitary, stemless rattan; stem very short, subterranean or erect, without sheaths, c. 20 mm diam., with sheaths to 50 mm diam. or more, internodes very short. Sheath splitting opposite the petiole for much of its length, dull green, armed with neat whorls of large brown flattened spines, 1-3 cm long, brown indumentum abundant between the spines; knee absent. Leaf ecirrate or with a very short cirrus scarcely exceeding 30 cm long, the whole leaf c. 2 m long including the petiole 70 -100 cm long; petiole fiercely armed with large golden-yellow spines to 8 cm long, borne laterally, singly or in groups of 2 or 3; leaflets 15 - 25 on each side of the rachis, regularly arranged, or rarely somewhat irregularly, stiff, rather thick, linear, the longest to c. 40 x 2 cm, the tips somewhat asymmetrical, sparsely armed with short bristles along the main vein on the undersurface; transverse veinlets close, sinuous. Inflorescences usually erect at anthesis, very stiff, up to 1 m long, the male more highly branched than the female; peduncle to 50 cm, unarmed; prophyll dull dirty-brown to 50 x 6 cm, usually much less, rather thick and coriaceous, bearing sparse groups of slender spines along the wings or ± unarmed, and bearing abundant pale indumentum; subsequent primary bracts similar to the prophyll but smaller, soon falling or rotting; partial inflorescences 7-8, usually very crowded, especially in the male, erect, stiff; male rachillae dark brown, to 20 (40) x 3 mm, bearing strictly distichous crowded flowers; female rachillae to 40 x 3 mm bearing distichous flower pairs. Mature fruit rounded, c. 15 mm diam., beaked, covered in 16 vertical rows of mid brown scales with darker margins. Seed rounded, c. 10 mm diam.; endosperm ruminate. Seedling not known (Fig. 34).
    Distribution
    Known from 1st, 3rd and 4th Divisions. Endemic.

    Images

    Distribution

    Calamus acamptostachys (Becc.) W.J.Baker appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Aug 10, 1982 Dransfield, J. [JD6078], Malaysia Daemonorops acamptostachys K000520273
    Aug 10, 1982 Dransfield, J. [JD5918], Malaysia Daemonorops acamptostachys K000520275
    Aug 10, 1982 Dransfield, J. [JD5919], Malaysia Daemonorops acamptostachys K000520267
    Aug 10, 1982 Dransfield, J. [JD6081], Malaysia Daemonorops acamptostachys K000520270
    Jan 15, 1980 Moore, H.E. [9080], Malaysia Daemonorops acamptostachys K000520266
    Sep 28, 1978 Brunig, E.F. [S17520], Malaysia Daemonorops acamptostachys K000520269
    Aug 15, 1978 Ridley, H.N. [2], Malaysia Daemonorops acamptostachys K000520278
    Aug 15, 1978 Ridley, H.N. [1], Malaysia Daemonorops acamptostachys K000520276
    Aug 15, 1978 Tomlinson [1], Malaysia Daemonorops acamptostachys K000520281
    Aug 15, 1978 Tomlinson [5], Malaysia Daemonorops acamptostachys K000520282
    Aug 15, 1978 Moore, H.E. [9139], Malaysia Daemonorops acamptostachys K000520262
    Aug 15, 1978 Moore, H.E. [9096], Malaysia Daemonorops acamptostachys K000520268
    Aug 15, 1978 Moore, H.E. [9139], Malaysia Daemonorops acamptostachys K000520263
    Aug 15, 1978 Moore, H.E. [9139], Malaysia Daemonorops acamptostachys K000520264
    Aug 15, 1978 Moore, H.E. [9139], Malaysia Daemonorops acamptostachys K000520265
    Aug 15, 1978 Anderson [R8], Malaysia Daemonorops acamptostachys K000520260
    Aug 15, 1978 Anderson [R8], Malaysia Daemonorops acamptostachys K000520261
    Aug 15, 1978 Dransfield, J. [JD4918], Malaysia Daemonorops acamptostachys K000520274
    Aug 15, 1978 Dransfield, J. [JD4919], Malaysia Daemonorops acamptostachys K000520272
    Aug 15, 1978 Tiggi, A. [S3324], Malaysia Daemonorops acamptostachys K000520271
    May 19, 1975 Tiggi, A. [S3325], Malaysia Daemonorops acamptostachys K000520280
    Ridley, H.N. [12395], Borneo Daemonorops acamptostachys K000208086 holotype
    Baker, W.J. [703], Malaysia Daemonorops acamptostachys K000520277
    Anonymous [s.n.2] Daemonorops acamptostachys K000520292

    First published in Phytotaxa 197(2): 141 (2015)

    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.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

    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