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

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

    [PW]
    General Description
    Stout solitary erect rattan to 3 m tall; stem without sheaths to c. 25 mm diam., with sheaths to c. 50 mm diam.; internodes short, c. 50 mm long. Leaf ecirrate to 2.2 m long; leaf sheaths mid green, drying pale greenish brown, armed with rather dense but evenly spaced black spines to c. 1l mm long, with scarcely swollen bases and pale brown indumentum abundant and persistent between the spines, spines around the leaf sheath mouth conspicuously different from the rest, long and horizontal, c. 20-40 × 3 mm with conspicuous swollen bases and dark reddish brown curled whisker-like, flexible bristles, to 90 mm long and 1 mm wide at the base; knee absent; flagellum absent; petiole to 45 cm long, armed with scattered triangular spines to 9 mm long, usually less; rachis arcuate, armed with scattered very robust reflexed and curved spines to 6 × 4 mm with black tips; leaflets c. 60 on each side of the rachis, evenly spaced, linear-lanceolate, 3- 4 cm distant, the longest in mid leaf to 34 × 2.5 cm, apical leaflets to 13.5 × 1.0 cm, not divaricate, all drying dirty brown, armed with very sparse short spinules on both surfaces and along the margins near the tips, transverse veinlets conspicuous, sinuous. Inflorescence, only pistillate known, branching to 2 orders, erect or arcuate, to 2 m long, with 4 partial inflorescences; prophyll elongate, ± tubular throughout, c. 80 cm long, 2 cm wide, armed distally with short horizontal dark brown flattened spines to 4 mm long, and abundant soft, flexible, ± reflexed dark red brown whiskerlike spines to 70 mm long, scattered floccose indumentum abundant between the spines; rachis bracts similar to the prophyll, similarly covered towards their tips with whisker-like bristles, these much shorter in the distalmost rachis bracts; partial inflorescence emerging at the mouth of the subtending bract, the basal to at least 30 cm long, the distal shorter and the apical to c. 23 cm; bracts on first order branch c. 11 × 4 mm, with truncate apex, unarmed but covered with abundant brown scales; mid inflorescence partial inflorescence bearing 11-12 strictly distichous rachillae on each side; rachillae 40-60 × 2.5 mm, rachilla bracts tubular with triangular limbs to 1 mm long, striate, with scattered very short dark brown spinules and scattered indumentum; involucrophore and involucre explanate, striate, not pedicellate; scar of sterile staminate flower c. 0.5 mm diam. Pistillate flower c. 4 × 3 mm, ± conical in outline; calyx to 3 mm long, striate, glabrous, tubular in the basal 2 mm, with three short triangular lobes; petals 3 × 1.5 mm, smooth; staminodes c. 1.1 × 0.2 mm; ovary c. 1.5 mm diam., tipped with non-scaly columnar style to 2 × 1.5 mm and three reflexed stigmas to 2 × 1 mm. Other parts unknown.
    Diagnostic
    bracteis inflorescentiae Sectionem Platyspatham Furtado pertinens, a C. myriacantho et ceteris speciebus sectionis spinis vix trichomatiformibus curvatis egregie mollibus apice vaginae foliorum et bractearum inflorescentiae differt.
    Vernacular
    Wi Tulang (Ib.)
    Distribution
    Known only from Bukit Teraja and Ulu Ingei, on Bukit Batu Patam. Endemic to Brunei.

    Images

    Distribution

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

    Date Reference Identified As Barcode Type Status
    Dransfield, J. [JD7027], Brunei K000114121 holotype
    Dransfield, J. [6593], Brunei K000114120

    First published in Rattans Brunei: 193 (1997 publ. 1998)

    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 & H. Beentje, The Palms of Madagascar. 1995

    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