1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Calamus L.
      1. Calamus evansii A.J.Hend.

        This species is accepted, and its native range is Central Laos.

    [PW]
    Diagnostic
    A Calamo kingiano differt pinnis longioribus et inflorescentiis bracteis primariis dense spinosis
    Distribution
    Lao (Khammuane).
    Biology
    Lowland forest, at 520-530 m elevation.
    Vernacular
    Leum, wai leum (Lao)
    General Description
    Stems clustered, 2.5-7 m long and 0.6-1.3 cm diameter (with leaf sheaths). Leaf sheaths green, with patchy, white tomentum initially, sparsely to densely covered with brown, black-tipped, flattened, horizontally spreading spines to 1 cm long, sometimes with many short spines interspersed; knees present; ocreas present, less than 0.5 cm long, densely covered with short, black bristles; flagella present; petioles 15-21 cm long, sparsely covered laterally and abaxially with recurved spines to 0.5 cm long; rachis 41-43 cm long, laterally and abaxially with few, recurved, solitary spines; pinnae 3-6 per side of rachis, lanceolate, arranged in distant groups or solitary, 30-43 cm long, 2.0-3.5 cm wide, without spines on the margins, minutely spiny at the apex, the apical pair of pinnae free or only briefly joined at their bases; cirri absent. Inflorescences 1.5-3 m long, flagellate; partial inflorescences inserted below the mouth of the partial inflorescence bracts; partial inflorescence bracts closely sheathing the main axis, briefly split at the apex, not bristly at the apex, densely covered with recurved spines; staminate inflorescences branched to three orders, with 5-7 partial inflorescences; rachillae 2-3 cm long; rachillae bracts distichously arranged, to 1 mm long, glabrous; floral bracteoles to 0.5 mm long, glabrous; staminate flowers not seen, arranged alternately and distichously along the rachillae; pistillate inflorescences branched to two orders, with 3-10 partial inflorescences, each with up to 19 rachillae; rachillae 3-8 cm long; rachillae bracts distichously arranged, to 2 mm long, glabrous; pistillate flowers to 12 per rachilla, borne alternately and distichously along the rachillae; sepals to 1.5 mm long, connate basally for ca. two-thirds their length, lobed above; petals to 2 mm long, free; fruits not seen.
    [PW]
    Use
    The stems are used for handicrafts

    Distribution

    Calamus evansii A.J.Hend. appears in other Kew resources:

    First published in Taiwania 52: 152 (2007)

    Accepted by

    • Peters, C.M. & Henderson, A. (2014). Systematics, ecology and management of Rattans in Cambodia, Laos and Vietnam: 1-222. Agricultural Printing House.
    • Henderson, A. (2009). Palms of Southern Asia: 1-197. Princeton university press, Princeton and Oxford.

    Literature

    Palmweb - Palms of the World Online
    • Henderson, A.J., New Species of Calamus (Palmae) from Lao and Myanmar in Taiwania 52(2). 2007

    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