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

        This species is accepted, and its native range is N. Sumatera.

    [PW]
    Diagnostic
    quoad habitus, vaginam folii et foliola C. ornati similis sed ocrea conspicua, rachillis staminatis cylindricis floribus spiraliter dispositis, staminibus 6 bene distincta.
    General Description
    Very robust clustering short-stemmed rattan to 4 m only. Stem with sheaths to 8 cm diam., without sheaths to 3 cm diam., internodes 15 - 30 cm long. Leaf subcirrate; sheaths dark green, with brown indumentum and sparse scattered and grouped flat triangular spines 20 - 35 x 5 - 10 mm, with yellowish swollen bases and black tips, the margins bearing caducous hairs; knee conspicuously swollen, c. 10 mm high, paler than the rest of the sheath, unarmed; ocrea conspicuous, triangular, to 7.5 cm long, attached to one side of the petiole, splitting longitudinally and tattering; flagellum to 1 m; petiole to 100 cm long, 3 - 4 cm wide and 1.5 cm thick at the base, abaxially rounded, ? flattened adaxially, adaxially unarmed, armed along edges and abaxially with robust triangular yellowish spines to 21 x 6 mm, some scattered, others arranged in a central row and two marginal rows; leaflets to 20 on each side of the rachis, regularly arranged, 7 - 13 cm apart along the rachis, the longest near the base to 60 x 5.5 cm, mid-leaf leaflets to 48 x 5 cm, the apical to 8 x 1 cm, unarmed except at the margins very near the tips, transverse veinlets conspicuous, very close. Staminate inflorescences to 2 m long, branching to 3 orders with c. 8 evenly spaced first order branches; prophyll to 16.5 cm, bearing dense chocolate-brown indument, splitting irregularly, almost to the base and tattering, armed with a few short triangular spines; rachis bracts 17 - 30 cm long, similar to the prophyll, but rather densely armed with short triangular spines 3 - 7 x 2 - 5 mm, particularly in the basal unsplit part; first order branches relatively short, 20 - 35 cm long with up to 26 rachillae; rachillae cylindrical, almost catkin-like, 30 - 40 x 10 - 12 mm; rachilla bracts very congested, appearing to be spirally arranged, forming pits, bracts triangular, 8.5 x 7 mm, striate, abaxially densely covered with silvery chaffy hairs, adaxially glabrous; involucre ? tubular, 4 x 5 mm, shallowly irregularly lobed, abaxially very densely covered with silvery hairs. Staminate flower buds 9 x 4.1 mm; calyx tubular in basal 6 mm, with 3 lobes to 2 x 3 mm, densely covered with brown and silvery hairs; corolla 8.5 x 4 mm, tubular in basal 3 mm, distally covered in shining brown scales; stamens 6, filaments 1 x 0.5 mm, anthers 3 x 1 mm; pistillode trifid with 3 slender processes to 2 x 0.2 mm. Pistillate inflorescence branching to two orders; rachis bracts similar to those of staminate inflorescence but longer; rachillae (in available specimen) 8, 4.5 - 8 x 1 cm with congested, distichously arranged bracts; rachilla bracts triangular, to 12 x 10 mm, abaxially densely covered with silvery hairs; involucrophore c. 1 cm, abaxially densely covered with silvery hairs; involucre c. 8 mm, forming a cup 6 mm diam., densely covered with silvery hairs; scar of sterile staminate flower c. 3 mm diam. Pistillate flower (poorly preserved) 9 x 6 mm; calyx tubular in basal 3 mm, lobes 4 x 4.5 mm, abaxially densely covered with dark scales throughout; corolla tubular in basal 1 mm, with lobes 4 x 4 mm, striate with scattered scales; ovary obpyriform, c. 4 mm wide near the base, with 3 recurved stigmas. Immature fruit 14 x 7.5 mm, beaked, covered with 17 vertical rows of shiny black unchannelled scales with irregular margins.

    Distribution

    Native to:

    Sumatera

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

    First published in Kew Bull. 55: 717 (2000)

    Accepted by

    • Govaerts, R. & Dransfield, J. (2005). World Checklist of Palms: 1-223. The Board of Trustees of the Royal Botanic Gardens, Kew.

    Literature

    Palmweb - Palms of the World Online
    • J. Dransfield, Calamus mogeae (Arecaceae), a bizarre new species from Sumatra. 2000

    Sources

    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