1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Calamus L.
      1. Calamus rhomboideus Blume

        This species is accepted, and its native range is Peninsula Thailand to W. Malesia.

    [PW]
    Distribution
    Perak, Trengganu, Borneo.
    Vernacular
    rotan tukas
    General Description
    Clustering rattan climbing to 20 m tall. Stem without sheaths to 1 cm in diameter, with sheaths to 2.5 cm, with internodes to 35 cm long. Sheaths with scattered rounded swellings each tipped with black upward pointing spine to 2 mm long, densely covered throughout with silvery flocculent indumentum drying yellowish, and caducous chocolate-coloured scales. Knee prominent. Ocrea to 1 cm high indumentose as the sheath. Flagellum to 1 m long. Leaf ecirrate or with a minute (1 cm long) cirrus vestige. Petiole to about 30 cm long. Leaflets 5 on each side of the rachis in mature leaves, diamond-shaped to 35 cm long by 18 cm wide, with no obvious stalk ± unarmed except for short bristles near the tip, with 7-9 major nerves; whole leaflet drying dirty yellowish green-brown. Inflorescence, male and female superficially similar, to 80 cm long with up to 5 partial inflorescences the largest to 35 cm long; male rachillae about 3 cm long; female to 8 cm long. ± mature fruit rounded to slightly oblong about 2.5 cm long 2.2 cm wide, shortly beaked, covered in 18 vertical rows of mid-brown scales. Seed ovate, about 1.8 cm long by 1.3 cm wide. Endosperm deeply ruminate. Seedling leaf bifid with 2 broad diamond-shaped leaflets.
    [PW]
    General Description
    Clustering moderate rattan climbing to 20 m; stem without sheaths 8-12 mm diam., with sheaths to 20 mm diam., internodes to 25 cm. Sheaths dull green but densely covered in greyish-yellow scales, drying grey, and scurfy caducous chocolate-coloured scales, and sparsely armed with short ± upward pointing spines to 3 mm, frequently borne on bulbous swellings; knee conspicuous; ocrea to 2 cm, dark brown. Flagellum to 1.5 m. Leaf ecirrate, to 60 cm long including the petiole to 15 cm; leaflets to 6 on each side of the rachis, broad diamond-shaped, with short stalks and bristly wavy margins, to 20 × 7.5 cm, with 5-7 main nerves. Inflorescences to 1.25 m with 3-4 partial inflorescences to 35 cm; male rachillae c. 1.5 cm long, female to 13 cm. Mature fruit rounded to obovoid or ellipsoid, to 22 × 17 cm, covered in 18-20 vertical rows of yellowish to brownish scales. Seed to 13 × 10 mm; endosperm deeply ruminate. Seedling leaf with 2 diamond-shaped leaflets. (Fig. 55).
    Distribution
    Scattered throughout Brunei but nowhere very abundant. Elsewhere throughout Borneo, Sumatra, Peninsular Malaysia and S Thailand.
    [PW]
    Use
    The cane has a good appearance but it is probably too rare to be of any significance. Calamus tomentosus is a rare rattan found on steep slopes in hill forest up to about 800 m altitude.

    Images

    Distribution

    Native to:

    Borneo, Jawa, Malaya, Sumatera, Thailand

    Calamus rhomboideus Blume appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Dec 14, 1986 Laumonier, Y. [YL6832], Indonesia K000525537
    Dransfield, J. [JD4007], Indonesia K000525536
    Dransfield, J. [4176], Indonesia K000525539
    Dransfield, J. [1711], Indonesia K000525540
    Witono, J. [169], Indonesia K000525538
    Nov 30, 1991 Van Valkenburg [1110], Indonesia Calamus tomentosus K000521393
    Mar 14, 1934 Ridley, H.N. [11410], Peninsular Malaysia Calamus tomentosus K000207766 isotype
    Apr 14, 2005 Watanabe, N.M. [NMW47], Indonesia Calamus blumei K000209398
    Aug 1, 2004 Dransfield, J. [JD4363], Indonesia Calamus blumei K000521723
    Aug 1, 2004 Dransfield, J. [JD4357], Indonesia Calamus blumei K000521722
    Apr 19, 2002 Lai, S.T. [75398], Malaysia Calamus blumei K000030651
    Mar 1, 2000 Ariffin [16513], Brunei Calamus blumei K000112569
    Apr 1, 1996 Ching [S56597], Malaysia Calamus blumei K000113000
    May 26, 1994 Ambriansyah [AA646], Indonesia Calamus blumei K000112982
    May 16, 1994 Ambri [AA507], Indonesia Calamus blumei K000112977
    Dec 22, 1993 Van Valkenburg [JVV1157], Indonesia Calamus blumei K000112959
    Dec 10, 1992 Stockdale, M.J. [421], Indonesia Calamus blumei K000112975
    Jan 31, 1992 Stockdale, M.C. [MCS82], Indonesia Calamus blumei K000112958
    Oct 1, 1991 Wong, K.M. [1987], Brunei Calamus blumei K000112954
    Jul 2, 1990 Dransfield, J. [WKM542], Brunei Calamus blumei K000112983
    Sep 1, 1989 Yii, P.C. [S52206], Malaysia Calamus blumei K000112953
    Sep 1, 1989 Lee [S52512], Malaysia Calamus blumei K000112957
    Dec 19, 1988 Clemens, J. [40520], Sabah Calamus blumei K000207794 isotype
    Oct 31, 1988 Purseglove, J.W. [P4488], Malaysia Calamus blumei K000112948
    Jun 24, 1988 Krispinus [SAN105252], Malaysia Calamus blumei K000112971
    Jan 2, 1987 Dransfield, J. [JD5644], Malaysia Calamus blumei K000112951
    Jan 2, 1987 Dransfield, J. [JD5604], Malaysia Calamus blumei K000112950
    Sep 20, 1983 Sundaling [SAN94954], Malaysia Calamus blumei K000112967
    Apr 11, 1981 Dransfield, J. [JD5893], Malaysia Calamus blumei K000112999
    Feb 12, 1981 Mogea, J.P. [1546], Indonesia Calamus blumei K000112966
    Jan 2, 1981 Dransfield, J. [JD5588], Malaysia Calamus blumei K000112952
    Jan 2, 1981 Dransfield, J. [JD5856], Malaysia Calamus blumei K000112986
    Jan 2, 1981 Dransfield, J. [JD5562], Malaysia Calamus blumei K000112970
    Jan 2, 1981 Dransfield, J. [JD5615], Malaysia Calamus blumei K000112972
    Jan 2, 1981 Dransfield, J. [JD5747], Malaysia Calamus blumei K000112996
    Jan 2, 1981 Fedilis [SAN89713], Malaysia Calamus blumei K000112985
    Jan 2, 1981 Gibot [SAN85732], Malaysia Calamus blumei K000112973
    Jan 2, 1981 Cuadra [250], Malaysia Calamus blumei K000112974
    Jan 10, 1979 Dransfield, J. [JD5283], Malaysia Calamus blumei K000112998
    Jun 16, 1976 Dransfield, J. [JD4629], Malaysia Calamus blumei K000112995
    Jun 16, 1976 Dransfield, J. [JD4630], Malaysia Calamus blumei K000113003
    Jun 16, 1976 Dransfield, J. [JD4614], Malaysia Calamus blumei K000112991
    Jun 16, 1976 Dransfield, J. [JD4675], Malaysia Calamus blumei K000113002
    Clemens, J. [40520], Sabah Calamus blumei K000112949 isotype
    Joseph [SAN109432], Malaysia Calamus blumei K000112987
    Mogea, J.P. [4329], Indonesia Calamus blumei K000112997
    Dransfield, J. [JD7253], Brunei Calamus blumei K000112960
    Baker, W.J. [565], Malaysia Calamus blumei K000112990
    Yii, P.C. [52122], Malaysia Calamus blumei K000112988
    Yii, P.C. [52125], Malaysia Calamus blumei K000112989
    Christensen [181], Malaysia Calamus blumei K000113001
    Sundaling [SAN93560], Malaysia Calamus blumei K000112968
    Dewol [SAN109292], Malaysia Calamus blumei K000112969
    Sibil [1], Malaysia Calamus blumei K000112984
    Sambuling [204], Malaysia Calamus blumei K000112955
    Sambuling [315], Malaysia Calamus blumei K000112978
    Sambuling [86], Malaysia Calamus blumei K000112976
    Sambuling [106], Malaysia Calamus blumei K000112980
    Sambuling [101], Malaysia Calamus blumei K000112981
    Sambuling [230], Malaysia Calamus blumei K000112961
    Sambuling [219], Malaysia Calamus blumei K000112962
    Sambuling [251], Malaysia Calamus blumei K000112963
    Sambuling [252], Malaysia Calamus blumei K000112964
    Sambuling [256], Malaysia Calamus blumei K000112992
    Sambuling [159], Malaysia Calamus blumei K000112993
    Sambuling [150], Malaysia Calamus blumei K000112994
    Simbayan [23], Malaysia Calamus blumei K000112979
    Andau [229], Malaysia Calamus blumei K000112965
    Furtado, C.X. [30906], Borneo Calamus slootenii K000687920 isotype

    First published in J.J.Roemer & J.A.Schultes, Syst. Veg., ed. 15 bis 7: 133 (1829)

    Accepted by

    • Govaerts, R. & Dransfield, J. (2005). World Checklist of Palms: 1-223. The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Govaerts, R. (1999). World Checklist of Seed Plants 3(1, 2a & 2b): 1-1532. MIM, Deurne.

    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