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  1. Family: Arecaceae Bercht. & J.Presl
    1. Genus: Areca L.
      1. Areca rheophytica J.Dransf.

        This species is accepted, and its native range is Borneo (Sabah).

    [PW]
    Diagnostic
    elegantissima, rheophytica, in ripis fluminum rivulorumque per petras serpentinas fluentium crescens, ad sectionem Arecellam (sensu Furtado) pertinens, a ceteris speciebus Borneen- sibus habitatione et foliolis plicarum singularium approximatis compositis, regulatim dispositis bene distincta; staminibus 6 et habitu solitario A. hutchinsonianae et A. vidalianae insularum Philippinarum affinis et vero a formis A. vidalianae quae foliola plicarum singularium composita habent, haud disting- uibilis, sed floribus pistillatis angustissimis, caule glabrato, habitatione et aspectu differt.
    Biology
    Growing as a rheophyte on the banks of fast-flowing rivers and streams in areas of ultrabasic rock, in the lowlands and up to about 400 m above sea level.
    General Description
    Solitary, short-stemmed, rheophytic, undergrowth palm, Stem to c. 2 m tall, usually less, 1-2 cm diam., pale brown except near the crownshaft where green, glabrous, internodes 2-4 cm, the nodal scars conspicuous c. 3-5 mm high. Crownshaft usually swollen, 15-30 x 2-4 cm, pale green. Leaves c. 7-8 in the crown; sheaths to 25 cm, usually less, smooth when fresh, drying ridged, bearing very sparse scattered scales; petiole 8-15 x 0.3-0.5 cm, channelled adaxially, rounded abaxially, bearing very sparse brown scales; leaflets 12-22 on each side of the rachis, dark green, close, regularly arranged, all single-fold except the apical pair and sometimes the basal pair which are 2-3-ribbed, concolorous, bearing very sparse, minute, brown scales scattered on both surfaces. Inflorescence erect at anthesis, to 22 cm, often less; prophyll to 25 x 3.5 cm, conspicuously winged, the wing margins somewhat erose and hairy towards the tip, the prophyll surface striate on drying, bearing scattered brown scales; peduncle 7-15 x 5 mm, winged at the very base; axis branching to 3 orders; rachillae slender, very numerous, to 120 x 1 mm, sometimes with a short bare portion at the base, usually with a basal triad, rarely with several triads, otherwise bearing paired staminate flowers in a single row on one side. Staminate flower narrow-ovoid, trigonous, creamy-white, citrus-scented; sepals 3, free, triangular, keeled, c. 0.8 x 0.4 mm; petals 3, striate, narrow-triangular, c. 2.2 x 0.7 mm; stamens 6, filaments very short, anthers elongate, c. 1.4 x 0.3 mm; pistillode trifid, conspicuous, exceeding the stamens, c. 1-8 X 0-3 mm. Pistillate flower at anthesis narrow, trigonous, c. 11 x 3 mm; sepals 3, free, imbricate, c. 7 x 4 mm; petals 3, exceeding the sepals, c. 10 x 6 mm, imbricate, with short triangular, valvate tips; ovary fusiform, c. 10 x 3 mm, tipped with 3 short stigmas. Fruit fusiform, pale green at first, at maturity becoming cherry-red, narrow-ellipsoidal, c. 20 x 7 mm; mesocarp becoming < 2-5 mm thick; seed fusiform, c. 15 x 5 mm.

    Images

    Distribution

    Other Data

    Areca rheophytica J.Dransf. appears in other Kew resources:

    Date Reference Identified As Barcode Type Status
    Dransfield, J. [JD5780], Malaysia K000207997 holotype

    Bibliography

    First published in Kew Bull. 39: 18 (1984)

    Accepted by

    • Govaerts, R. & Dransfield, J. (2005). World Checklist of Palms: 1-223. The Board of Trustees of the Royal Botanic Gardens, Kew.
    • Govaerts, R. (1995). World Checklist of Seed Plants 1(1, 2): 1-483, 1-529. MIM, Deurne.

    Literature

    Palmweb - Palms of the World Online

    • J. Dransfield, The genus Areca (Palmae: Arecoideae) in Borneo. 1984

    Sources

    Herbarium Catalogue Specimens
    'The Herbarium Catalogue, Royal Botanic Gardens, Kew. Published on the Internet http://www.kew.org/herbcat [accessed on Day Month Year]'. Please enter the date on which you consulted the system.
    Digital Image © Board of Trustees, RBG Kew http://creativecommons.org/licenses/by/3.0/

    Kew Backbone Distributions
    The International Plant Names Index and World Checklist of Selected Plant Families 2020. 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 2020. 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