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.

[PW]
Use
No uses recorded.

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.

  • Kew Backbone Distributions

    The International Plant Names Index and World Checklist of Selected Plant Families 2022. 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 2022. 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

  • Kew Science Photographs

    Copyright applied to individual images

  • 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