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

        This species is accepted, and its native range is S. Peninsula Thailand to N. Sumatera.

    [PW]
    Distribution
    Kedah, Perak, Kelantan, Trengganu, Pahang, Selangor, Negri Sembilan, Johore: Endemic.
    General Description
    Solitary acaulescent or short stemmed palm, hardly climbing rarely more than 2 m tall. Stem without sheaths to about 4.5 cm in diameter with internodes 2-3 cm long. Stem with sheaths up to 6 cm in diameter. Sheaths dull green, densely covered in paler green spines of varying length, usually up to 4 cm long but much longer round the leaf sheath mouth where up to 20 cm long and upward pointing; sheath also densely covered with brownish scales between the spines; knee absent; spines usually sparser just below petiole. Ocrea ill-defined. Leaf ecirrate to 3 m long. Petiole 60-100 cm long armed with robust lateral spines to 4 cm long and scattered smaller spines on upper and lower surfaces. Leaflets 20-30 on each side of rachis, rather distant, broad and rather conspicuously plicate, to 50 cm long by 5 cm wide in mid-section of leaf, decreasing above, the uppermost pair about 15 cm long by 2 cm wide, markedly diverging. Inflorescence without flagellum, confusingly variable; peduncle often to 60 cm or more in length; in both male and female primary bracts exceeding and partly enclosing the whole inflorescence, bright mid-brown in colour armed with spines at the base only, densely scaly outside, shiny darker brown inside. Flowers small and densely crowded. Sometimes inflorescence very short, not more than 20 cm long including peduncle. Mature fruit rounded relatively small, to 8 mm diameter covered in 15-18 vertical rows of bright red-brown scales. Seed round with thin sweet sarcotesta; endosperm homogeneous. Seedling leaf bifid, with noticeably divergent leaflets.
    Vernacular
    rotan duduk
    [PW]
    Use
    Stem rarely used in making walking sticks.

    Images

    Distribution

    Native to:

    Malaya, Sumatera, Thailand

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

    First published in Kew Bull. 33: 528 (1979)

    Accepted by

    • Barfod, A.S. & Dransfield, J. (2013). Flora of Thailand 11(3): 323-498. The Forest Herbarium, National Park, Wildlife and Plant Conservation Department, Bangkok.
    • Henderson, A. (2009). Palms of Southern Asia: 1-197. Princeton university press, Princeton and Oxford.
    • 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, A Manual of the rattans of the Malay Peninsula. Malayan Forest Recirds 29.. 1979

    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