1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Calamus L.
      1. Calamus unijugus (J.Dransf.) W.J.Baker

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

    [PW]
    Distribution
    Known only from four collections from limestone hills near Kg Belimbing, Padawan, in the 1st Division. Endemic.
    General Description
    Clustering slender rattan with stems climbing to 20 m tall; stem without sheaths to c. 5 mm diam., with sheaths to c. 9 mm diam., internodes to 18 cm long. Sheath dull green, bearing rather sparse horizontal groups of minute black easily detached spicules knee conspicuous, unarmed. Leaf cirrate, to 70 cm long including the short petiole to 8 cm and the cirrus to 65 cm; leaflets comprising a single pair only, to 35 x 7 cm, usually less, rather stiff, the tips ± hooded, unarmed except for a few bristles along the margins near the tip, both surfaces mid green, transverse veinlets inconspicuous. Inflorescences usually sparsely produced, pendulous, slender, to 50 - 55 cm long; peduncle to c. 20 cm, rather sparsely armed with short spines; prophyll (known only in the male) to 9 x 1.5 cm, sparsely armed; partial inflorescences 5 - 6, to 6 cm in male, to 15 cm in the female. Mature fruit relatively large, ovoid, strongly beaked, to 30 x 20 mm, covered in 17 vertical rows of greenish brown scales. Seed c. 20 x 13 mm. irregularly ovoid; endosperm deeply ruminate. Seedling leaf not known (Fig. 31).

    Images

    Distribution

    Calamus unijugus (J.Dransf.) W.J.Baker appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Dransfield, J. [JD5894], Malaysia Daemonorops unijuga K000113957
    Dransfield, J. [JD5895], Malaysia Daemonorops unijuga K000113958
    Erwin [27478], Sarawak Daemonorops unijuga K000113956 holotype

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

    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