1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Calamus L.
      1. Calamus convallium J.Dransf.

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

    [PW]
    General Description
    Moderate clustering rattan tending to form rather low open thickets, occasionally high climbing to 20 m long; stem without sheaths 10-15 mm diam., with sheaths to 25 mm diam., internodes to 15 cm long. Sheaths dull green, armed with rather sparse brittle black flattened spines to 25 × 5 mm, spine margins conspicuously fringed with hairs, deciduous pale brown scales present between the spines; knee conspicuous, usually unarmed; ocrea scarcely developed. Flagellum absent in juveniles, reaching 1.3 m only in mature stems, sometimes reduced to a short vestige. Leaf curved, conspicuously subcirrate to 1.5 m including petiole to 30 cm, the petiole armed with distant reflexed black spines along the margins; leaflets lanceolate, somewhat acuminate, 12-20 on each side of the rachis, in the proximal part arranged in very distant pairs, strongly divergent within the pairs, less distinctly paired near the tip, the longest leaflets to 40 × 5 cm, those near the tip very much smaller, the smallest c. 4.5 × 0.4 cm; leaflets armed along the margins only, transverse veinlets conspicuous. Male inflorescence to 1.5 m, bearing 5 evenly spaced partial inflorescences to 16 cm, bracts tightly sheathing, armed with scattered spines, the margins fringed with hairs; rachillae conspicuouslyrecurved; male flowers globular. Female inflorescence much shorter than the male with 1-3 short partial inflorescences. Mature fruit ovoid c. 4 × 2.5 cm, with a conical beak and covered in c. 16 vertical rows of chestnut brown scales. Seedling leaf not known. (Fig. 46).
    Distribution
    Known from a single collection from Temburong. Otherwise known from scattered localities in Sabah and Sarawak. Endemic.
    [PW]
    Use
    None known, though the cane appears to be of good quality.

    Images

    Distribution

    Calamus convallium J.Dransf. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Aug 17, 2000 Boje, K.K. [50], Malaysia K000113431
    Jun 1, 1994 Soibeh [617], Malaysia K000113170
    Apr 22, 1993 Awa [S50472], Malaysia K000113168
    Oct 1, 1991 Wong, K.M. [WKM1917], Brunei K000113113
    Jul 25, 1991 Ching [S44663], Malaysia K000113200
    Jun 15, 1990 Lee Meng Hock [53847], Malaysia K000113107
    Dransfield, J. [JD6332], Malaysia K000113108
    Dransfield, J. [JD5543], Malaysia K000113109
    Dransfield, J. [JD6024], Malaysia K000113110
    Dransfield, J. [JD5773], Malaysia K000113111
    Dransfield, J. [JD6136], Malaysia K000113106
    Dransfield, J. [JD5750], Malaysia K000113174
    Dransfield, J. [JD6014], Malaysia K000113167
    Dransfield, J. [JD 5816], Sabah K000113166 holotype
    Hoare, A. [299], Malaysia K000114215
    Hoare, A. [59], Malaysia K000114223
    Hoare, A. [212], Malaysia K000114222
    Hoare, A. [108], Malaysia K000114221
    Van Valkenburg [JVV1124], Indonesia K000113169
    Awmack, C. [306], Indonesia K000113172
    Awmack, C. [305], Indonesia K000113173
    Awmack, C. [313], Indonesia K000113112
    Duaneh [120], Malaysia K000113171

    First published in Kew Bull. 36: 800 (1982)

    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.

    Literature

    Palmweb - Palms of the World Online
    • J. Dransfield, The Rattans of Brunei Darussalam. 1997

    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