1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Calamus L.
      1. Calamus tenuis Roxb.

        This species is accepted, and its native range is Uttarakhand to Indo-China, Sumatera to Jawa.

    wai nyair, nyair (Lao Loum).
    India (North-east and North-central), Bangladesh, Myanmar, Thailand (North), Laos (Central), Vietnam (Tonkin) and Indonesia (Sumatra and Java). Probably also Vietnam (Cochinchina) (Gagnepain & Conrard 1937).
    Unknown, but the wide range of the species suggests that it is likely to be secure in at least some areas. The Lao populations occur in densely-populated lowland floodplains and, although many plants remain, future intensification of land-use may reduce numbers greatly. The species is severely threatened in Java.
    Scrub, often in areas which flood regularly, at 200 - 300 m.
    General Description
    Probably a cluster-forming climber; stem unknown. Leaves ecirrate; petiole about 50 cm long; rachis subtrigonous on upper side, slightly concave below; leaflets equidistant, closely set on rachis, ensiform, 5-nerved; intermediate leaflets 32 - 35 cm long, 2 - 2.2 cm broad at middle, bristly at margins; midnerve and lateral nerves bristly. Female inflorescence slender; upper primary bract elongate, tubular at base; partial inflorescence 30 cm or more long with its base enclosed within the respective basal bract; rachillae distichous with their base attached to the axis on basal cushion just above the mouth of tubular, truncate respective basal bracts; basal rachillae about 6 cm long with about 90 flowers on each side; involucrophorum non-pedicelliform; female flowers 3 mm long; neuter flowers as long as female flowers. Fruits unknown.
    South India.
    The cane is of high quality for handicrafts and accepted in trade. The shoot is edible. The cultivation of this species for the production of edible shoots is becoming increasingly widespread in Laos (Belcher 1999, Sengdala & Evans 1999, Evans & Sengdala in press) and also occurs in North-east Thailand.



    Native to:

    Assam, Bangladesh, Cambodia, East Himalaya, India, Jawa, Laos, Myanmar, Sumatera, Thailand, Vietnam, West Himalaya

    Calamus tenuis Roxb. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Thompson [s.n.E93], India K000522022
    Griffith [s.n.E100], Bangladesh K000522033
    Griffith [s.n.E101], Bangladesh K000522034
    Griffith [s.n.E103], India K000522036
    Mann, G. [s.n.E102], India K000522037
    Mann, G. [s.n.E102], India K000522038
    unknown [21], India K000522023
    Henderson, A. [3121], Myanmar K000208532
    Henderson, A. [3173], Myanmar K000208569
    Gamble [24014], India K000522029
    Gamble [10112], India K000522025
    Gamble [7656], India K000522039
    Gamble [24014], India K000522030
    Gamble [7656], India K000522021
    Gamble [7656], India K000522031
    Haines, H.H. [5242], India K000522024
    Strachey and Winterbottom [s.n.E97], India K000522028
    Hooker and Thompson [s.n.E98], Bangladesh K000522018
    Hooker and Thompson [s.n.E99], Bangladesh K000522032
    Hooker and Thompson [s.n.E94], India K000522020
    Hooker and Thompson [s.n.E95], India K000522019
    Hooker and Thompson [s.n.E96], India K000522017
    Jenkins, J.D. [s.n.E104], India K000522035
    Harsakh [22851], India K000522026
    Harsakh [22851], India K000522027

    First published in Fl. Ind. ed. 1832, 3: 780 (1832)

    Accepted by

    • Bhattacharya, R.P., Pal, D.C. & Pati, B.R. (2014). A sytematic census of monocot climbers of Bihar anf Jharkhand states Indian Journal of Forestry 37: 317-324.
    • Peters, C.M. & Henderson, A. (2014). Systematics, ecology and management of Rattans in Cambodia, Laos and Vietnam: 1-222. Agricultural Printing House.
    • Barfod, A.S. & Dransfield, J. (2013). Flora of Thailand 11(3): 323-498. The Forest Herbarium, National Park, Wildlife and Plant Conservation Department, Bangkok.
    • Sarmah, K.K. & Borthakur, S.K. (2009). A checklist of angiospermic plants of Manas national park in Assam, India Pleione 3: 190-200.
    • 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.


    Palmweb - Palms of the World Online
    • T. Evans & K. Sengdala & B. Thammavong & O.V. Viengkham & J. Dransfield, A Synopsis of the Rattans (Arecaceae: Calamoideae) of Laos and Neighbouring Parts of Indochina. 2002


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    © Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0

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