1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Arenga Labill. ex DC.
      1. Arenga ryukyuensis A.J.Hend.

        This species is accepted, and its native range is Nansei-shoto.

    [PW]
    General Description
    Stems short and subterranean except for flowering stems, these reaching 2 m tall, 20 cm diameter. Leaves pinnate; sheaths fibrous; ocrea net-like, sheathing, to 30 cm long; petioles to 1 m long, covered with felt-like, light brown tomentum and dark brown, peltate scales; rachis to 2 m long, tomentose as the petiole; pinnae 32-48 per side of rachis, linear, strongly ribbed adaxially, notched along the distal margins, without ears at the base, or rarely ears present, regularly arranged and spreading in the same plane except for the basal few pinnae, these paired; middle pinnae 43-59 cm long, 1.7-3.5 cm wide. Inflorescences interfoliar, unisexual, not seen in their entirety; staminate rachillae 26-37 cm long, 2.9-4.6 mm diameter, numerous, glabrous; staminate flowers 8-9.5 mm long, spirally and distantly arranged; sepals 2.5-3.5 mm long; petals 7.5-9 mm long; filaments 0.5-1 mm long; anthers 5.5-6 mm long; stamens 35-59; pistillate inflorescences pendulous; rachillae 16-31 cm long, 3.4-6.8 mm diameter, glabrous; pistillate flowers spirally and distantly arranged, 16-27 cm long, 5 mm diameter, glabrous; pistillate flowers 2.5 mm long; sepals 2 mm long, broadly imbricate; petals 2.5 mm long, valvate for ca. two thirds their length; fruits globose, 1.2-1.8 cm diameter, orange or red.
    Vernacular
    Kuru-tsugu, mani.
    Biology
    Lowland forest or secondary forest along river margins, or scrub forest especially near the sea shore, at low elevations.
    Distribution
    Japan, Ryukyu Islands (Sakishima Group, Okinawa Group).
    Diagnostic
    Ab Arenga engleri differt: pinnis subter valde costatis, marginibus distalis lobatis; filamentis 0.5-1 mm longis; et staminibus 35-59.

    Distribution

    Native to:

    Nansei-shoto

    Introduced into:

    Japan, Ogasawara-shoto

    Arenga ryukyuensis A.J.Hend. appears in other Kew resources:

    First published in Taiwania 51: 298 (2006)

    Accepted by

    • 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., A New Species of Arenga (Palmae) in Taiwania 51(4). 2006
    Kew Backbone Distributions
    • Henderson, A. (2009). Palms of Southern Asia: 1-197. Princeton university press, Princeton and Oxford.

    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