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

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

    [PW]
    Diagnostic
    ad sectionem Arecellam pertinens, haec species mirabilis habitu acaulescenti, inflorescentia interfoliari, pedunculo longissimo distinctissima; superficialiter A. subacauli (Becc.) J. Dransf. et A. brachypodae J. Dransf. sectionis Microarecae similis sed folio pinnato et floribus staminatis uniseriatis distinguibilis.
    Biology
    In lowland Dipterocarp Forest on gentle slopes by sluggish stream at about 20 m altitude. In April 1981 I counted about 30 plants of this curious palm. Were it not in flower, it would perhaps be passed over as a seedling of a species of Pinanga.
    Distribution
    Borneo, Sarawak, 1st Division, known only from the type population.
    General Description
    Acaulescent, solitary, undergrowth palmlet; stem very short, subterranean or somewhat decumbent c. 8 x 2.5 cm, bearing very close leaf scars and short stilt roots c. 3 mm diam. Leaf sheaths c. 13 cm long, c. 7 cm in basal circum- ference, apparently tardily abscising, scarcely forming a crownshaft, splitting along ? the entire length opposite the petiole, tinged dull purplish brown, longitudinally striate, and bearing scattered brown scales; ligule present but soon disintegrating. Leaf excluding sheath to c. 1 m, often less, with petiole c. 42 x 0.5 cm; leaflets narrow to broad-lanceolate, in the holotype 6 on each side of the rachis, fewer in some plants noted in the field, (1-) 2-4-ribbed, acuminate except for the apical 5-6-ribbed pair with short apical lobing; basal and mid leaf leaflets to 45 x 1.5 cm, apical pair to 30 x 6 cm, some- what sigmoid, the apical lobing to 5 mm deep; lamina glabrous, adaxial surface rich dark green, shining when fresh, abaxial surface paler. Inflores- cence interfoliar; prophyll to 35 x 1.3 cm, flattened, tinged purplish, bearing scattered brown scales; peduncle becoming arcuate, c. 200 x 2 mm, oval in cross section, somewhat increasing in width with age to 3 mm, purplish with scattered brown scales; rachillae 5-8, purplish, crowded at the end of the peduncle, at staminate anthesis c. 60 x 1 mm, increasing as fruit develops to c. 110 x 2.5 mm. Flowers borne in triads only at the very base of the rachilla, usually no more than 1 triad per rachilla, sometimes no triad present, distally the flattened rachillae bearing a single row of pairs or solitary staminate flowers. Staminate flower sessile, greenish in bud, narrow-clavate, to 4 x 1 mm; calyx 1.5 mm, tubular at the base, tipped with 3 triangular lobes, the central line of each lobe somewhat thickened; petals 3, striate, free almost to the base, 3.5 x 1 mm; stamens 6, with anthers to 2 mm, filaments to 1 mm; pistillode absent; pollen white. Pistillate flower in bud 7 x 3-5 mm; sepals 3, imbricate, cucullate, to 7 x 3 mm; petals 3, imbricate to 6 X 2 mm; staminodes absent; ovary strongly trigonous to 4.5 x 1.5 mm. Mature fruit purplish black, fusiform, 4.3 x 1.4 cm, tipped with conspicuous trifid stig- matic remains; mesocarp thin, fleshy; endocarp thin, fibrous. Seed basally attached, narrow obclavate, 22 X 7 mm; endosperm deeply ruminate; embryo basal.

    Images

    Distribution

    Other Data

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

    Date Reference Identified As Barcode Type Status
    Lai, S.T. [S.38946], Sarawak K000208015 holotype

    Bibliography

    First published in Kew Bull. 39: 4 (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