1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Livistona R.Br.
      1. Livistona halongensis T.H.Nguyên & Kiew

        This species is accepted, and its native range is NE. Vietnam (Ha Long Bay Islands).

    [PW]
    Habitat
    Confined to limestone islands, in soil-filled crevices on rocky limestone substrate, sometimes gregarious, 100-300 m alt. Flowers May-Jun; fruits July.
    Distribution
    Vietnam. Islands in Ha Long Bay.
    Conservation
    Lower risk, conservation dependent.
    General Description
    Hermaphroditic palm. Trunk to 10 m tall, ca 20 cm dbh, leaf scars conspicuous, internodes narrow. Leaves ca 40 in a ± globose crown; petiole 125-130 cm long, ca 2 cm wide at the base, ca 1.5 cm wide distally, adaxially flat, green with a light yellow band along the margin, margin with irregularly spaced triangular hooked dull orange spines along entire length but more aggregated proximally; leaf-base fibrous, appendage triangular,rich brown, fibrous, distally tattered into ribbons; hastula papery, to 2.5 cm high; lamina costapalmate, regularly segmented, circular, 75-80 cm long, undulate, adaxially dark green, abaxially lighter green; mid-leaf segments ca 4 cm wide where the segments diverge; lamina divided for 42-73% of its length, with 45-64 segments, depth of apical cleft ca. 40% of the segment length, apical lobes rigid to semi-pendulous; parallel veins 11-13 each side of midrib; transverse veins thinner than parallel veins; basal part of outer segment with a 2 cm long row of fine teeth on the margin. Inflorescences unbranched at the base, ca 340 cm long, erect, projecting vertically above the crown and extending well beyond the limit of the crown, branched to 3 orders; partial inflorescences 6-7, longest to 95 cm; peduncle ca 160 cm long, 2 cm diam.; prophyll to 33 cm long, basally 5 cm wide, distally to 3 cm wide; peduncular bracts 5, each ca 50 cm long, tightly tubular, thick, leathery-fibrous; rachis bracts ca 27 cm long, otherwise similar topeduncular bracts; rachillae 1.0-1.5 mm diam., cream, velvety tomentose. Flowers in pairs on pedicel ca 0.3 mm long, ovoid in bud, pale creamyellow; sepals basally fused with lobes ca 1 mm long, glabrous; petals ca 2 mm long; stamens ca 1 mm long, subulate, staminal tube rich brown, filament very short; anthers white, ca 0.3 mm long; carpel obovoid, deeply ridged, dark reddish brown, ca 1 mm long; style pale brown, ca 0.3 mm long; stigma minute. Fruit globose, 10-12 mm diam., epicarp smooth, glossy dark green; mesocarp leathery; endocarp crustaceous, brittle, ca 0.75 mm thick; endosperm intruded by seed coat to ca halfway through; pedicel 2-5 mm long. Eophyll not seen.

    Distribution

    Native to:

    Vietnam

    Livistona halongensis T.H.Nguyên & Kiew appears in other Kew resources:

    First published in Gard. Bull. Singapore 52: 198 (2000)

    Accepted by

    • Dowe, J.L. (2009). A taxonomic account of Livistona R.Br. (Arecaceae) Gardens' Bulletin Singapore 60: 185-344.
    • 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.

    Literature

    Palmweb - Palms of the World Online
    • Dowe, J.L., A taxonomic account of Livistona R.Br. (Arecaceae)

    Sources

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2018. 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 2018. 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