1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Calamus L.
      1. Calamus dumetosus (J.Dransf.) A.J.Hend. & Floda

        This species is accepted, and its native range is Borneo.

    [PW]
    Vernacular
    Uwai Belalong (Dus.)
    Distribution
    Known from two collections. Elsewhere in Sarawak, Kalimantan and Sabah; endemic to Borneo.
    General Description
    Robust thicket-forming dioecious, pleonanthic rattan with short massive stems, rarely exceeding 8 m long, but in Brunei to 15 m or more; stem without sheaths to 7 cm diam., with to 10 cm diam., usually less; bare stem dark green with short internodes to 10 cm and conspicuous nodes, also sometimes with bulbil shoots and adventitious roots. Sheaths without knee, dull green, densely armed with black flattened spines of length varying from 1.5-60 mm, the larger with paler bases and arranged in oblique partly reflexed combs, pale brown tomentum also abundant; ocrea conspicuous on emerging sheaths, soon disintegrating. Leaf curved, ecirrate, to almost 4 m long; petiole to 60 cm, conspicuously channelled and armed with lateral spine groups; leaflets c. 80 on each side of the rachis, very regular, dark green, armed with black bristles along the margins and lower surface of the main vein. Inflorescence male and female superficially similar, pendulous to c. 1 m with few branches; main axis and branches covered in tubular net-like bracts, pale straw-coloured, the main bracts also armed with black spine whorls; ultimate bracts to 8 cm long, distichous and imbricate, each enclosing a short catkin-like flower-bearing branch. Fruit developing inside the net-like bracts, the nets expanding to accommodate the enlarging fruit; fruit ovoid to obpyriform to 20 × 18 mm, bright green with brown scale margins, ripening to yellowish-brown with darker margins. Seed solitary, obscurely angled; sarcotesta sweet; endosperm homogenous. Seedling leaf pinnate with ciliate hairy leaflets. (Figs. 76-78, Pl. 15A, 15B)

    Images

    Distribution

    Calamus dumetosus (J.Dransf.) A.J.Hend. & Floda appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Dransfield, J. [2840] Retispatha dumetosa 43730.000
    Mogea, J.P. [2735], Indonesia Retispatha dumetosa K000522348
    Dransfield, J. [6602], Brunei Retispatha dumetosa K000522352
    Dransfield, J. [7073], Brunei Retispatha dumetosa K000522356
    Dransfield, J. [5827], Malaysia Retispatha dumetosa K000522351
    Dransfield, J. [5599], Malaysia Retispatha dumetosa K000522349
    Dransfield, J. [4632], Malaysia Retispatha dumetosa K000522357
    Dransfield, J. [5985], Malaysia Retispatha dumetosa K000522355
    Dransfield, J. [4410], Indonesia Retispatha dumetosa K000522354
    Dransfield, J. [5595], Malaysia Retispatha dumetosa K000522299
    Dransfield, J. [4403], Kalimantan Retispatha dumetosa K000522353 holotype
    Dransfield, J. [6082], Malaysia Retispatha dumetosa K000522346
    Dransfield, J. [4726], Malaysia Retispatha dumetosa K000522347
    Baker, W.J. [530], Brunei Retispatha dumetosa K000522350
    Awa [51200], Malaysia Retispatha dumetosa K000522358
    Chai [39630], Malaysia Retispatha dumetosa K000522298

    First published in Phytotaxa 192(1): 59 (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