1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Calamus L.
      1. Calamus sekundurensis (Rustiami & Zumaidar) W.J.Baker

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

    [PW]
    General Description
    Clustering small rattan up to 2 m tall. Leaf sheaths green, covered with jointed bases forming collar spines, scarcely, up to 3 cm long, sheath surface smooth with caducuous reddish-blackish scaly indumentum, leaf sheath mouth armed as the rest of sheath; knee present, very conspicuous, armed as the rest of sheath. Leaves to 3 m long including petiole to 25 cm, armed adaxially with short, erect, scattered spines to 4 mm long, abaxially armed with erect, solitary spines, rarely, up to 15 mm long; rachis unarmed, or armed only slightly proximally; cirrus up to 1.5 m long, armed with regularly arranged groups of grapnel-like spines, blackish at the tip; leaflets mostly arranged regularly, slightly irregular above, 30 on each side of the rachis, stiff, horizontal; leaflets lanceolate, papery, acute, 25-31 cm long, 2.5 cm wide, armed with scattered, reddish, short bristles along the main nerve on both surfaces. Inflorescences pendulous to 35 cm long, peduncle 13-16 cm long, armed distally with groups of spines; peduncular bracts leathery, erect, 17 cm long, 3 cm wide, ellipsoid oblong, covered by rusty indumentum, armed with scattered spines; partial inflorescences 6 each, bearing up to 11 rachillae; involucre pendulous, flat, just above the involucrophore, 5 mm long; involucrophore short, papery, 2 mm long. Female and male flowers unknown. Fruits diamond shape, slightly flat at the top of fruit, 1.5 x 1 cm, covered by 7 vertical rows of reddish brown dragon's blood encrusted scales. Seed ovoid, 18 x 7 mm, surface smooth.
    Biology
    Found on hill slopes in disturbed forest at an altitude of 800 m.
    Diagnostic
    Hie species differt ab alius ad collaris forma in geniculatus bases spinus in folium vaginae et rhomboideus fructus cum leviter complanatus in fructus apices.

    Distribution

    Native to:

    Sumatera

    Calamus sekundurensis (Rustiami & Zumaidar) W.J.Baker appears in other Kew resources:

    First published in Phytotaxa 197(2): 149 (2015)

    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